2 Advanced Linux Sound Architecture - Driver
3 ==========================================
10 To enable ALSA support you need at least to build the kernel with
11 primary sound card support (CONFIG_SOUND). Since ALSA can emulate OSS,
12 you don't have to choose any of the OSS modules.
14 Enable "OSS API emulation" (CONFIG_SND_OSSEMUL) and both OSS mixer and
15 PCM supports if you want to run OSS applications with ALSA.
17 If you want to support the WaveTable functionality on cards such as
18 SB Live! then you need to enable "Sequencer support"
19 (CONFIG_SND_SEQUENCER).
21 To make ALSA debug messages more verbose, enable the "Verbose printk"
22 and "Debug" options. To check for memory leaks, turn on "Debug memory"
23 too. "Debug detection" will add checks for the detection of cards.
25 Please note that all the ALSA ISA drivers support the Linux isapnp API
26 (if the card supports ISA PnP). You don't need to configure the cards
33 This depends on your distribution, but normally you use the /dev/MAKEDEV
34 script to create the necessary device nodes. On some systems you use a
35 script named 'snddevices'.
41 The user can load modules with options. If the module supports more than
42 one card and you have more than one card of the same type then you can
43 specify multiple values for the option separated by commas.
45 Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
50 The core ALSA module. It is used by all ALSA card drivers.
51 It takes the following options which have global effects.
53 major - major number for sound driver
56 - limiting card index for auto-loading (1-8)
58 - For auto-loading more than one card, specify this
59 option together with snd-card-X aliases.
60 slots - Reserve the slot index for the given driver.
61 This option takes multiple strings.
62 See "Module Autoloading Support" section for details.
67 The PCM OSS emulation module.
68 This module takes options which change the mapping of devices.
70 dsp_map - PCM device number maps assigned to the 1st OSS device.
72 adsp_map - PCM device number maps assigned to the 2st OSS device.
75 - Don't block opening busy PCM devices. Default: 1
77 For example, when dsp_map=2, /dev/dsp will be mapped to PCM #2 of
78 the card #0. Similarly, when adsp_map=0, /dev/adsp will be mapped
79 to PCM #0 of the card #0.
80 For changing the second or later card, specify the option with
81 commas, such like "dsp_map=0,1".
83 nonblock_open option is used to change the behavior of the PCM
84 regarding opening the device. When this option is non-zero,
85 opening a busy OSS PCM device won't be blocked but return
86 immediately with EAGAIN (just like O_NONBLOCK flag).
91 This module takes options which change the mapping of devices.
92 similar to those of the snd-pcm-oss module.
94 midi_map - MIDI device number maps assigned to the 1st OSS device.
96 amidi_map - MIDI device number maps assigned to the 2st OSS device.
99 Common parameters for top sound card modules
100 --------------------------------------------
102 Each of top level sound card module takes the following options.
104 index - index (slot #) of sound card
105 - Values: 0 through 31 or negative
106 - If nonnegative, assign that index number
107 - if negative, interpret as a bitmask of permissible
108 indices; the first free permitted index is assigned
110 id - card ID (identifier or name)
111 - Can be up to 15 characters long
112 - Default: the card type
113 - A directory by this name is created under /proc/asound/
114 containing information about the card
115 - This ID can be used instead of the index number in
118 - Default: enabled, for PCI and ISA PnP cards
123 Module for AdLib FM cards.
125 port - port # for OPL chip
127 This module supports multiple cards. It does not support autoprobe, so
128 the port must be specified. For actual AdLib FM cards it will be 0x388.
129 Note that this card does not have PCM support and no mixer; only FM
132 Make sure you have "sbiload" from the alsa-tools package available and,
133 after loading the module, find out the assigned ALSA sequencer port
134 number through "sbiload -l". Example output:
136 Port Client name Port name
137 64:0 OPL2 FM synth OPL2 FM Port
139 Load the std.sb and drums.sb patches also supplied by sbiload:
141 sbiload -p 64:0 std.sb drums.sb
143 If you use this driver to drive an OPL3, you can use std.o3 and drums.o3
144 instead. To have the card produce sound, use aplaymidi from alsa-utils:
146 aplaymidi -p 64:0 foo.mid
151 Module for sound cards based on Analog Devices AD1816A/AD1815 ISA chips.
153 clockfreq - Clock frequency for AD1816A chip (default = 0, 33000Hz)
155 This module supports multiple cards, autoprobe and PnP.
160 Module for sound cards based on AD1848/AD1847/CS4248 ISA chips.
162 port - port # for AD1848 chip
163 irq - IRQ # for AD1848 chip
164 dma1 - DMA # for AD1848 chip (0,1,3)
166 This module supports multiple cards. It does not support autoprobe
167 thus main port must be specified!!! Other ports are optional.
169 The power-management is supported.
174 Module for Analog Devices AD1889 chips.
176 ac97_quirk - AC'97 workaround for strange hardware
177 See the description of intel8x0 module for details.
179 This module supports multiple cards.
184 Module for ALi M5451 PCI chip.
186 pcm_channels - Number of hardware channels assigned for PCM
187 spdif - Support SPDIF I/O
190 This module supports one chip and autoprobe.
192 The power-management is supported.
197 Module for sound cards based on Avance Logic ALS100/ALS120 ISA chips.
199 This module supports multiple cards, autoprobe and PnP.
201 The power-management is supported.
206 Module for Avance Logic ALS300 and ALS300+
208 This module supports multiple cards.
210 The power-management is supported.
215 Module for sound cards based on Avance Logic ALS4000 PCI chip.
217 joystick_port - port # for legacy joystick support.
218 0 = disabled (default), 1 = auto-detect
220 This module supports multiple cards, autoprobe and PnP.
222 The power-management is supported.
227 Module for ATI IXP 150/200/250/400 AC97 controllers.
229 ac97_clock - AC'97 clock (default = 48000)
230 ac97_quirk - AC'97 workaround for strange hardware
231 See "AC97 Quirk Option" section below.
232 ac97_codec - Workaround to specify which AC'97 codec
233 instead of probing. If this works for you
234 file a bug with your `lspci -vn` output.
236 -1 -- Default behavior.
237 0-2 -- Use the specified codec.
238 spdif_aclink - S/PDIF transfer over AC-link (default = 1)
240 This module supports one card and autoprobe.
242 ATI IXP has two different methods to control SPDIF output. One is
243 over AC-link and another is over the "direct" SPDIF output. The
244 implementation depends on the motherboard, and you'll need to
245 choose the correct one via spdif_aclink module option.
247 The power-management is supported.
249 Module snd-atiixp-modem
250 -----------------------
252 Module for ATI IXP 150/200/250 AC97 modem controllers.
254 This module supports one card and autoprobe.
256 Note: The default index value of this module is -2, i.e. the first
259 The power-management is supported.
261 Module snd-au8810, snd-au8820, snd-au8830
262 -----------------------------------------
264 Module for Aureal Vortex, Vortex2 and Advantage device.
266 pcifix - Control PCI workarounds
267 0 = Disable all workarounds
268 1 = Force the PCI latency of the Aureal card to 0xff
269 2 = Force the Extend PCI#2 Internal Master for Efficient
270 Handling of Dummy Requests on the VIA KT133 AGP Bridge
271 3 = Force both settings
272 255 = Autodetect what is required (default)
274 This module supports all ADB PCM channels, ac97 mixer, SPDIF, hardware
275 EQ, mpu401, gameport. A3D and wavetable support are still in development.
276 Development and reverse engineering work is being coordinated at
277 http://savannah.nongnu.org/projects/openvortex/
278 SPDIF output has a copy of the AC97 codec output, unless you use the
279 "spdif" pcm device, which allows raw data passthru.
280 The hardware EQ hardware and SPDIF is only present in the Vortex2 and
283 Note: Some ALSA mixer applications don't handle the SPDIF sample rate
284 control correctly. If you have problems regarding this, try
285 another ALSA compliant mixer (alsamixer works).
290 Module for sound cards based on Aztech System AZT2320 ISA chip (PnP only).
292 This module supports multiple cards, PnP and autoprobe.
294 The power-management is supported.
299 Module for sound cards based on Aztech AZF3328 PCI chip.
301 joystick - Enable joystick (default off)
303 This module supports multiple cards.
308 Module for video cards based on Bt87x chips.
310 digital_rate - Override the default digital rate (Hz)
311 load_all - Load the driver even if the card model isn't known
313 This module supports multiple cards.
315 Note: The default index value of this module is -2, i.e. the first
321 Module for Creative Audigy LS and SB Live 24bit
323 This module supports multiple cards.
329 Module for sound cards based on C-Media CMI8330 ISA chips.
331 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
333 with isapnp=0, the following options are available:
335 wssport - port # for CMI8330 chip (WSS)
336 wssirq - IRQ # for CMI8330 chip (WSS)
337 wssdma - first DMA # for CMI8330 chip (WSS)
338 sbport - port # for CMI8330 chip (SB16)
339 sbirq - IRQ # for CMI8330 chip (SB16)
340 sbdma8 - 8bit DMA # for CMI8330 chip (SB16)
341 sbdma16 - 16bit DMA # for CMI8330 chip (SB16)
343 This module supports multiple cards and autoprobe.
345 The power-management is supported.
350 Module for C-Media CMI8338/8738/8768/8770 PCI sound cards.
352 mpu_port - port address of MIDI interface (8338 only):
353 0x300,0x310,0x320,0x330 = legacy port,
354 0 = disable (default)
355 fm_port - port address of OPL-3 FM synthesizer (8x38 only):
357 1 = integrated PCI port (default on 8738),
359 soft_ac3 - Software-conversion of raw SPDIF packets (model 033 only)
361 joystick_port - Joystick port address (0 = disable, 1 = auto-detect)
363 This module supports autoprobe and multiple cards.
365 The power-management is supported.
370 Module for sound cards based on CS4231 ISA chips.
372 port - port # for CS4231 chip
373 mpu_port - port # for MPU-401 UART (optional), -1 = disable
374 irq - IRQ # for CS4231 chip
375 mpu_irq - IRQ # for MPU-401 UART
376 dma1 - first DMA # for CS4231 chip
377 dma2 - second DMA # for CS4231 chip
379 This module supports multiple cards. This module does not support autoprobe
380 thus main port must be specified!!! Other ports are optional.
382 The power-management is supported.
387 Module for sound cards based on CS4232/CS4232A ISA chips.
389 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
391 with isapnp=0, the following options are available:
393 port - port # for CS4232 chip (PnP setup - 0x534)
394 cport - control port # for CS4232 chip (PnP setup - 0x120,0x210,0xf00)
395 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
396 fm_port - FM port # for CS4232 chip (PnP setup - 0x388), -1 = disable
397 irq - IRQ # for CS4232 chip (5,7,9,11,12,15)
398 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
399 dma1 - first DMA # for CS4232 chip (0,1,3)
400 dma2 - second DMA # for Yamaha CS4232 chip (0,1,3), -1 = disable
402 This module supports multiple cards. This module does not support autoprobe
403 (if ISA PnP is not used) thus main port must be specified!!! Other ports are
406 The power-management is supported.
411 Module for sound cards based on CS4235/CS4236/CS4236B/CS4237B/
412 CS4238B/CS4239 ISA chips.
414 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
416 with isapnp=0, the following options are available:
418 port - port # for CS4236 chip (PnP setup - 0x534)
419 cport - control port # for CS4236 chip (PnP setup - 0x120,0x210,0xf00)
420 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
421 fm_port - FM port # for CS4236 chip (PnP setup - 0x388), -1 = disable
422 irq - IRQ # for CS4236 chip (5,7,9,11,12,15)
423 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
424 dma1 - first DMA # for CS4236 chip (0,1,3)
425 dma2 - second DMA # for CS4236 chip (0,1,3), -1 = disable
427 This module supports multiple cards. This module does not support autoprobe
428 (if ISA PnP is not used) thus main port and control port must be
429 specified!!! Other ports are optional.
431 The power-management is supported.
436 Module for Cirrus Logic CS4281 soundchip.
438 dual_codec - Secondary codec ID (0 = disable, default)
440 This module supports multiple cards.
442 The power-management is supported.
447 Module for PCI sound cards based on CS4610/CS4612/CS4614/CS4615/CS4622/
448 CS4624/CS4630/CS4280 PCI chips.
450 external_amp - Force to enable external amplifier.
451 thinkpad - Force to enable Thinkpad's CLKRUN control.
452 mmap_valid - Support OSS mmap mode (default = 0).
454 This module supports multiple cards and autoprobe.
455 Usually external amp and CLKRUN controls are detected automatically
456 from PCI sub vendor/device ids. If they don't work, give the options
459 The power-management is supported.
464 Module for Cyrix/NatSemi Geode 5530 chip.
466 Module snd-cs5535audio
467 ----------------------
469 Module for multifunction CS5535 companion PCI device
471 The power-management is supported.
476 Module for Echoaudio Darla20
478 This module supports multiple cards.
479 The driver requires the firmware loader support on kernel.
484 Module for Echoaudio Darla24
486 This module supports multiple cards.
487 The driver requires the firmware loader support on kernel.
492 Module for Diamond Technologies DT-019X / Avance Logic ALS-007 (PnP
495 This module supports multiple cards. This module is enabled only with
498 The power-management is supported.
503 Module for the dummy sound card. This "card" doesn't do any output
504 or input, but you may use this module for any application which
505 requires a sound card (like RealPlayer).
507 The power-management is supported.
512 Module for Echoaudio 3G cards (Gina3G/Layla3G)
514 This module supports multiple cards.
515 The driver requires the firmware loader support on kernel.
520 Module for EMU10K1/EMU10k2 based PCI sound cards.
521 * Sound Blaster Live!
522 * Sound Blaster PCI 512
523 * Emu APS (partially supported)
524 * Sound Blaster Audigy
526 extin - bitmap of available external inputs for FX8010 (see bellow)
527 extout - bitmap of available external outputs for FX8010 (see bellow)
528 seq_ports - allocated sequencer ports (4 by default)
529 max_synth_voices - limit of voices used for wavetable (64 by default)
530 max_buffer_size - specifies the maximum size of wavetable/pcm buffers
531 given in MB unit. Default value is 128.
532 enable_ir - enable IR
534 This module supports multiple cards and autoprobe.
536 Input & Output configurations [extin/extout]
537 * Creative Card wo/Digital out [0x0003/0x1f03]
538 * Creative Card w/Digital out [0x0003/0x1f0f]
539 * Creative Card w/Digital CD in [0x000f/0x1f0f]
540 * Creative Card wo/Digital out + LiveDrive [0x3fc3/0x1fc3]
541 * Creative Card w/Digital out + LiveDrive [0x3fc3/0x1fcf]
542 * Creative Card w/Digital CD in + LiveDrive [0x3fcf/0x1fcf]
543 * Creative Card wo/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
544 * Creative Card w/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
545 * Creative Card w/Digital CD in + Digital I/O 2 [0x0fcf/0x1f0f]
546 * Creative Card 5.1/w Digital out + LiveDrive [0x3fc3/0x1fff]
547 * Creative Card 5.1 (c) 2003 [0x3fc3/0x7cff]
548 * Creative Card all ins and outs [0x3fff/0x7fff]
550 The power-management is supported.
555 Module for Creative Emu10k1X (SB Live Dell OEM version)
557 This module supports multiple cards.
562 Module for Ensoniq AudioPCI ES1370 PCI sound cards.
563 * SoundBlaster PCI 64
564 * SoundBlaster PCI 128
566 joystick - Enable joystick (default off)
568 This module supports multiple cards and autoprobe.
570 The power-management is supported.
575 Module for Ensoniq AudioPCI ES1371 PCI sound cards.
576 * SoundBlaster PCI 64
577 * SoundBlaster PCI 128
578 * SoundBlaster Vibra PCI
580 joystick_port - port # for joystick (0x200,0x208,0x210,0x218),
581 0 = disable (default), 1 = auto-detect
583 This module supports multiple cards and autoprobe.
585 The power-management is supported.
590 Module for sound cards based on ESS ES968 chip (PnP only).
592 This module supports multiple cards, PnP and autoprobe.
594 The power-management is supported.
599 Module for ESS AudioDrive ES-1688 and ES-688 sound cards.
601 port - port # for ES-1688 chip (0x220,0x240,0x260)
602 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
603 irq - IRQ # for ES-1688 chip (5,7,9,10)
604 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
605 dma8 - DMA # for ES-1688 chip (0,1,3)
607 This module supports multiple cards and autoprobe (without MPU-401 port).
612 Module for ESS AudioDrive ES-18xx sound cards.
614 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
616 with isapnp=0, the following options are available:
618 port - port # for ES-18xx chip (0x220,0x240,0x260)
619 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
620 fm_port - port # for FM (optional, not used)
621 irq - IRQ # for ES-18xx chip (5,7,9,10)
622 dma1 - first DMA # for ES-18xx chip (0,1,3)
623 dma2 - first DMA # for ES-18xx chip (0,1,3)
625 This module supports multiple cards, ISA PnP and autoprobe (without MPU-401
626 port if native ISA PnP routines are not used).
627 When dma2 is equal with dma1, the driver works as half-duplex.
629 The power-management is supported.
634 Module for sound cards based on ESS Solo-1 (ES1938,ES1946) chips.
636 This module supports multiple cards and autoprobe.
638 The power-management is supported.
643 Module for sound cards based on ESS Maestro-1/2/2E (ES1968/ES1978) chips.
645 total_bufsize - total buffer size in kB (1-4096kB)
646 pcm_substreams_p - playback channels (1-8, default=2)
647 pcm_substreams_c - capture channels (1-8, default=0)
648 clock - clock (0 = auto-detection)
649 use_pm - support the power-management (0 = off, 1 = on,
651 enable_mpu - enable MPU401 (0 = off, 1 = on, 2 = auto (default))
652 joystick - enable joystick (default off)
654 This module supports multiple cards and autoprobe.
656 The power-management is supported.
661 Module for ForteMedia FM801 based PCI sound cards.
663 tea575x_tuner - Enable TEA575x tuner
664 - 1 = MediaForte 256-PCS
665 - 2 = MediaForte 256-PCPR
666 - 3 = MediaForte 64-PCR
667 - High 16-bits are video (radio) device number + 1
668 - example: 0x10002 (MediaForte 256-PCPR, device 1)
670 This module supports multiple cards and autoprobe.
672 The power-management is supported.
677 Module for Echoaudio Gina20
679 This module supports multiple cards.
680 The driver requires the firmware loader support on kernel.
685 Module for Echoaudio Gina24
687 This module supports multiple cards.
688 The driver requires the firmware loader support on kernel.
690 Module snd-gusclassic
691 ---------------------
693 Module for Gravis UltraSound Classic sound card.
695 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
696 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
697 dma1 - DMA # for GF1 chip (1,3,5,6,7)
698 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
699 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
700 voices - GF1 voices limit (14-32)
701 pcm_voices - reserved PCM voices
703 This module supports multiple cards and autoprobe.
705 Module snd-gusextreme
706 ---------------------
708 Module for Gravis UltraSound Extreme (Synergy ViperMax) sound card.
710 port - port # for ES-1688 chip (0x220,0x230,0x240,0x250,0x260)
711 gf1_port - port # for GF1 chip (0x210,0x220,0x230,0x240,0x250,0x260,0x270)
712 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable
713 irq - IRQ # for ES-1688 chip (5,7,9,10)
714 gf1_irq - IRQ # for GF1 chip (3,5,9,11,12,15)
715 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
716 dma8 - DMA # for ES-1688 chip (0,1,3)
717 dma1 - DMA # for GF1 chip (1,3,5,6,7)
718 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
719 voices - GF1 voices limit (14-32)
720 pcm_voices - reserved PCM voices
722 This module supports multiple cards and autoprobe (without MPU-401 port).
727 Module for Gravis UltraSound MAX sound card.
729 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
730 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
731 dma1 - DMA # for GF1 chip (1,3,5,6,7)
732 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
733 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
734 voices - GF1 voices limit (14-32)
735 pcm_voices - reserved PCM voices
737 This module supports multiple cards and autoprobe.
742 Module for Intel HD Audio (ICH6, ICH6M, ESB2, ICH7, ICH8),
743 ATI SB450, SB600, RS600,
747 [Multiple options for each card instance]
748 model - force the model name
749 position_fix - Fix DMA pointer (0 = auto, 1 = none, 2 = POSBUF, 3 = FIFO size)
750 probe_mask - Bitmask to probe codecs (default = -1, meaning all slots)
752 [Single (global) options]
753 single_cmd - Use single immediate commands to communicate with
754 codecs (for debugging only)
755 enable_msi - Enable Message Signaled Interrupt (MSI) (default = off)
756 power_save - Automatic power-saving timtout (in second, 0 =
758 power_save_controller - Reset HD-audio controller in power-saving mode
761 This module supports multiple cards and autoprobe.
763 Each codec may have a model table for different configurations.
764 If your machine isn't listed there, the default (usually minimal)
765 configuration is set up. You can pass "model=<name>" option to
766 specify a certain model in such a case. There are different
767 models depending on the codec chip.
769 Model name Description
770 ---------- -----------
772 3stack 3-jack in back and a headphone out
773 3stack-digout 3-jack in back, a HP out and a SPDIF out
774 5stack 5-jack in back, 2-jack in front
775 5stack-digout 5-jack in back, 2-jack in front, a SPDIF out
776 6stack 6-jack in back, 2-jack in front
777 6stack-digout 6-jack with a SPDIF out
779 z71v 3-jack (HP shared SPDIF)
780 asus 3-jack (ASUS Mobo)
782 asus-dig ASUS with SPDIF out
783 asus-dig2 ASUS with SPDIF out (using GPIO2)
785 fujitsu Fujitsu Laptops (Pi1536)
787 lg LG laptop (m1 express dual)
788 lg-lw LG LW20/LW25 laptop
790 clevo Clevo laptops (m520G, m665n)
791 test for testing/debugging purpose, almost all controls can be
792 adjusted. Appearing only when compiled with
794 auto auto-config reading BIOS (default)
798 hp-3013 HP machines (3013-variant)
799 fujitsu Fujitsu S7020
801 will Will laptops (PB V7900)
802 replacer Replacer 672V
803 basic fixed pin assignment (old default model)
804 test for testing/debugging purpose, almost all controls can
805 adjusted. Appearing only when compiled with
807 auto auto-config reading BIOS (default)
810 fujitsu Fujitsu Laptop
811 hp-bpc HP xw4400/6400/8400/9400 laptops
812 hp-bpc-d7000 HP BPC D7000
813 hp-tc-t5735 HP Thin Client T5735
817 hippo Hippo (ATI) with jack detection, Sony UX-90s
818 hippo_1 Hippo (Benq) with jack detection
819 sony-assamd Sony ASSAMD
820 ultra Samsung Q1 Ultra Vista model
821 basic fixed pin assignment w/o SPDIF
822 auto auto-config reading BIOS (default)
828 dell Dell OEM laptops (Vostro 1200)
830 test for testing/debugging purpose, almost all controls can
831 adjusted. Appearing only when compiled with
833 auto auto-config reading BIOS (default)
836 3stack-dig 3-stack (2-channel) with SPDIF
837 3stack-6ch 3-stack (6-channel)
838 3stack-6ch-dig 3-stack (6-channel) with SPDIF
839 6stack-dig 6-stack with SPDIF
840 lenovo-101e Lenovo laptop
841 eeepc-p701 ASUS Eeepc P701
842 eeepc-ep20 ASUS Eeepc EP20
843 auto auto-config reading BIOS (default)
846 3stack-dig 3-jack with SPDIF I/O
847 6stack-dig 6-jack digital with SPDIF I/O
849 targa Targa T8, MSI-1049 T8
852 macpro MacPro support
853 mbp3 Macbook Pro rev3
854 imac24 iMac 24'' with jack detection
856 auto auto-config reading BIOS (default)
859 3stack-dig 3-jack with SPDIF I/O
860 6stack-dig 6-jack digital with SPDIF I/O
861 3stack-6ch 3-jack 6-channel
862 3stack-6ch-dig 3-jack 6-channel with SPDIF I/O
863 6stack-dig-demo 6-jack digital for Intel demo board
864 acer Acer laptops (Travelmate 3012WTMi, Aspire 5600, etc)
865 acer-aspire Acer Aspire 9810
866 medion Medion Laptops
867 medion-md2 Medion MD2
869 targa-2ch-dig Targs/MSI with 2-channel
870 laptop-eapd 3-jack with SPDIF I/O and EAPD (Clevo M540JE, M550JE)
871 lenovo-101e Lenovo 101E
872 lenovo-nb0763 Lenovo NB0763
873 lenovo-ms7195-dig Lenovo MS7195
875 6stack-hp HP machines with 6stack (Nettle boards)
876 3stack-hp HP machines with 3stack (Lucknow, Samba boards)
877 6stack-dell Dell machines with 6stack (Inspiron 530)
879 auto auto-config reading BIOS (default)
883 3stack-dig 3-jack with SPDIF I/O
884 6stack-dig 6-jack with SPDIF I/O
885 3stack-660 3-jack (for ALC660)
886 uniwill-m31 Uniwill M31 laptop
887 toshiba Toshiba laptop support
888 asus Asus laptop support
889 asus-laptop ASUS F2/F3 laptops
890 auto auto-config reading BIOS (default)
894 3stack-dig 3-jack with SPDIF OUT
895 6stack-dig 6-jack with SPDIF OUT
896 3stack-660 3-jack (for ALC660VD)
897 3stack-660-digout 3-jack with SPDIF OUT (for ALC660VD)
898 lenovo Lenovo 3000 C200
899 dallas Dallas laptops
901 auto auto-config reading BIOS (default)
904 minimal 3-jack in back
905 min_fp 3-jack in back, 2-jack in front
906 full 6-jack in back, 2-jack in front
907 full_dig 6-jack in back, 2-jack in front, SPDIF I/O
908 allout 5-jack in back, 2-jack in front, SPDIF out
909 auto auto-config reading BIOS (default)
912 3stack 3-stack mode (default)
915 AD1884A / AD1883 / AD1984A / AD1984B
916 desktop 3-stack desktop (default)
917 laptop laptop with HP jack sensing
923 basic 3-jack (default)
925 thinkpad Lenovo Thinkpad T60/X60/Z60
932 basic default configuration
933 thinkpad Lenovo Thinkpad T61/X61
937 6stack 6-jack, separate surrounds (default)
938 3stack 3-stack, shared surrounds
939 laptop 2-channel only (FSC V2060, Samsung M50)
940 laptop-eapd 2-channel with EAPD (Samsung R65, ASUS A6J)
941 laptop-automute 2-channel with EAPD and HP-automute (Lenovo N100)
942 ultra 2-channel with EAPD (Samsung Ultra tablet PC)
946 6stack-dig ditto with SPDIF
948 3stack-dig ditto with SPDIF
949 laptop 3-jack with hp-jack automute
950 laptop-dig ditto with SPDIF
951 auto auto-config reading BIOS (default)
954 laptop-hpsense Laptop with HP sense (old model laptop)
955 laptop-micsense Laptop with Mic sense (old model fujitsu)
956 laptop-hpmicsense Laptop with HP and Mic senses
958 test for testing/debugging purpose, almost all controls
959 can be adjusted. Appearing only when compiled with
963 laptop Basic Laptop config
964 laptop-hp Laptop config for some HP models (subdevice 30A5)
965 laptop-eapd Laptop config with EAPD support
966 test for testing/debugging purpose, almost all controls
967 can be adjusted. Appearing only when compiled with
971 laptop Basic Laptop config (default)
976 dell-d21 Dell (unknown)
977 dell-d22 Dell (unknown)
978 dell-d23 Dell (unknown)
979 dell-m21 Dell Inspiron 630m, Dell Inspiron 640m
980 dell-m22 Dell Latitude D620, Dell Latitude D820
981 dell-m23 Dell XPS M1710, Dell Precision M90
982 dell-m24 Dell Latitude 120L
983 dell-m25 Dell Inspiron E1505n
984 dell-m26 Dell Inspiron 1501
985 dell-m27 Dell Inspiron E1705/9400
986 gateway Gateway laptops with EAPD control
990 dell-m42 Dell (unknown)
991 dell-m43 Dell Precision
992 dell-m44 Dell Inspiron
997 5stack D945 5stack + SPDIF
998 intel-mac-v1 Intel Mac Type 1
999 intel-mac-v2 Intel Mac Type 2
1000 intel-mac-v3 Intel Mac Type 3
1001 intel-mac-v4 Intel Mac Type 4
1002 intel-mac-v5 Intel Mac Type 5
1003 macmini Intel Mac Mini (equivalent with type 3)
1004 macbook Intel Mac Book (eq. type 5)
1005 macbook-pro-v1 Intel Mac Book Pro 1st generation (eq. type 3)
1006 macbook-pro Intel Mac Book Pro 2nd generation (eq. type 3)
1007 imac-intel Intel iMac (eq. type 2)
1008 imac-intel-20 Intel iMac (newer version) (eq. type 3)
1009 dell-d81 Dell (unknown)
1010 dell-d82 Dell (unknown)
1011 dell-m81 Dell (unknown)
1012 dell-m82 Dell XPS M1210
1015 ref Reference board, base config
1016 m2-2 Some Gateway MX series laptops
1017 m6 Some Gateway NX series laptops
1018 pa6 Gateway NX860 series
1020 STAC9227/9228/9229/927x
1023 5stack D965 5stack + SPDIF
1024 dell-3stack Dell Dimension E520
1027 vaio Setup for VAIO FE550G/SZ110
1028 vaio-ar Setup for VAIO AR
1030 The model name "genric" is treated as a special case. When this
1031 model is given, the driver uses the generic codec parser without
1032 "codec-patch". It's sometimes good for testing and debugging.
1034 If the default configuration doesn't work and one of the above
1035 matches with your device, report it together with the PCI
1036 subsystem ID (output of "lspci -nv") to ALSA BTS or alsa-devel
1037 ML (see the section "Links and Addresses").
1039 power_save and power_save_controller options are for power-saving
1040 mode. See powersave.txt for details.
1042 Note 2: If you get click noises on output, try the module option
1043 position_fix=1 or 2. position_fix=1 will use the SD_LPIB
1044 register value without FIFO size correction as the current
1045 DMA pointer. position_fix=2 will make the driver to use
1046 the position buffer instead of reading SD_LPIB register.
1047 (Usually SD_LPLIB register is more accurate than the
1050 NB: If you get many "azx_get_response timeout" messages at
1051 loading, it's likely a problem of interrupts (e.g. ACPI irq
1052 routing). Try to boot with options like "pci=noacpi". Also, you
1053 can try "single_cmd=1" module option. This will switch the
1054 communication method between HDA controller and codecs to the
1055 single immediate commands instead of CORB/RIRB. Basically, the
1056 single command mode is provided only for BIOS, and you won't get
1057 unsolicited events, too. But, at least, this works independently
1058 from the irq. Remember this is a last resort, and should be
1059 avoided as much as possible...
1061 MORE NOTES ON "azx_get_response timeout" PROBLEMS:
1062 On some hardwares, you may need to add a proper probe_mask option
1063 to avoid the "azx_get_response timeout" problem above, instead.
1064 This occurs when the access to non-existing or non-working codec slot
1065 (likely a modem one) causes a stall of the communication via HD-audio
1066 bus. You can see which codec slots are probed by enabling
1067 CONFIG_SND_DEBUG_DETECT, or simply from the file name of the codec
1068 proc files. Then limit the slots to probe by probe_mask option.
1069 For example, probe_mask=1 means to probe only the first slot, and
1070 probe_mask=4 means only the third slot.
1072 The power-management is supported.
1077 Module for RME Hammerfall DSP audio interface(s)
1079 This module supports multiple cards.
1081 Note: The firmware data can be automatically loaded via hotplug
1082 when CONFIG_FW_LOADER is set. Otherwise, you need to load
1083 the firmware via hdsploader utility included in alsa-tools
1085 The firmware data is found in alsa-firmware package.
1087 Note: snd-page-alloc module does the job which snd-hammerfall-mem
1088 module did formerly. It will allocate the buffers in advance
1089 when any HDSP cards are found. To make the buffer
1090 allocation sure, load snd-page-alloc module in the early
1091 stage of boot sequence. See "Early Buffer Allocation"
1097 Module for RME HDSP MADI board.
1099 precise_ptr - Enable precise pointer, or disable.
1100 line_outs_monitor - Send playback streams to analog outs by default.
1101 enable_monitor - Enable Analog Out on Channel 63/64 by default.
1103 See hdspm.txt for details.
1108 Module for the MediaTek/TempoTec HiFier Fantasia sound card.
1110 This module supports autoprobe and multiple cards.
1112 Power management is _not_ supported.
1117 Module for Envy24 (ICE1712) based PCI sound cards.
1118 * MidiMan M Audio Delta 1010
1119 * MidiMan M Audio Delta 1010LT
1120 * MidiMan M Audio Delta DiO 2496
1121 * MidiMan M Audio Delta 66
1122 * MidiMan M Audio Delta 44
1123 * MidiMan M Audio Delta 410
1124 * MidiMan M Audio Audiophile 2496
1127 * TerraTec EWX 24/96
1128 * TerraTec DMX 6Fire
1130 * Hoontech SoundTrack DSP 24
1131 * Hoontech SoundTrack DSP 24 Value
1132 * Hoontech SoundTrack DSP 24 Media 7.1
1133 * Event Electronics, EZ8
1135 * Lionstracs, Mediastaton
1137 model - Use the given board model, one of the following:
1138 delta1010, dio2496, delta66, delta44, audiophile, delta410,
1139 delta1010lt, vx442, ewx2496, ews88mt, ews88mt_new, ews88d,
1140 dmx6fire, dsp24, dsp24_value, dsp24_71, ez8,
1141 phase88, mediastation
1142 omni - Omni I/O support for MidiMan M-Audio Delta44/66
1143 cs8427_timeout - reset timeout for the CS8427 chip (S/PDIF transceiver)
1144 in msec resolution, default value is 500 (0.5 sec)
1146 This module supports multiple cards and autoprobe. Note: The consumer part
1147 is not used with all Envy24 based cards (for example in the MidiMan Delta
1150 Note: The supported board is detected by reading EEPROM or PCI
1151 SSID (if EEPROM isn't available). You can override the
1152 model by passing "model" module option in case that the
1153 driver isn't configured properly or you want to try another
1159 Module for Envy24HT (VT/ICE1724), Envy24PT (VT1720) based PCI sound cards.
1160 * MidiMan M Audio Revolution 5.1
1161 * MidiMan M Audio Revolution 7.1
1162 * MidiMan M Audio Audiophile 192
1164 * TerraTec Aureon 5.1 Sky
1165 * TerraTec Aureon 7.1 Space
1166 * TerraTec Aureon 7.1 Universe
1169 * AudioTrak Prodigy 7.1
1170 * AudioTrak Prodigy 7.1LT
1171 * AudioTrak Prodigy 192
1173 * Albatron K8X800 Pro II
1174 * Chaintech ZNF3-150
1175 * Chaintech ZNF3-250
1182 model - Use the given board model, one of the following:
1183 revo51, revo71, amp2000, prodigy71, prodigy71lt,
1184 prodigy192, aureon51, aureon71, universe, ap192,
1185 k8x800, phase22, phase28, ms300, av710, se200pci,
1188 This module supports multiple cards and autoprobe.
1190 Note: The supported board is detected by reading EEPROM or PCI
1191 SSID (if EEPROM isn't available). You can override the
1192 model by passing "model" module option in case that the
1193 driver isn't configured properly or you want to try another
1199 Module for Echoaudio Indigo
1201 This module supports multiple cards.
1202 The driver requires the firmware loader support on kernel.
1207 Module for Echoaudio Indigo DJ
1209 This module supports multiple cards.
1210 The driver requires the firmware loader support on kernel.
1215 Module for Echoaudio Indigo IO
1217 This module supports multiple cards.
1218 The driver requires the firmware loader support on kernel.
1223 Module for AC'97 motherboards from Intel and compatibles.
1224 * Intel i810/810E, i815, i820, i830, i84x, MX440
1225 ICH5, ICH6, ICH7, ESB2
1226 * SiS 7012 (SiS 735)
1227 * NVidia NForce, NForce2, NForce3, MCP04, CK804
1229 * AMD AMD768, AMD8111
1232 ac97_clock - AC'97 codec clock base (0 = auto-detect)
1233 ac97_quirk - AC'97 workaround for strange hardware
1234 See "AC97 Quirk Option" section below.
1235 buggy_irq - Enable workaround for buggy interrupts on some
1236 motherboards (default yes on nForce chips,
1238 buggy_semaphore - Enable workaround for hardwares with buggy
1239 semaphores (e.g. on some ASUS laptops)
1241 spdif_aclink - Use S/PDIF over AC-link instead of direct connection
1242 from the controller chip
1243 (0 = off, 1 = on, -1 = default)
1245 This module supports one chip and autoprobe.
1247 Note: the latest driver supports auto-detection of chip clock.
1248 if you still encounter too fast playback, specify the clock
1249 explicitly via the module option "ac97_clock=41194".
1251 Joystick/MIDI ports are not supported by this driver. If your
1252 motherboard has these devices, use the ns558 or snd-mpu401
1253 modules, respectively.
1255 The power-management is supported.
1257 Module snd-intel8x0m
1258 --------------------
1260 Module for Intel ICH (i8x0) chipset MC97 modems.
1261 * Intel i810/810E, i815, i820, i830, i84x, MX440
1263 * SiS 7013 (SiS 735)
1264 * NVidia NForce, NForce2, NForce2s, NForce3
1268 ac97_clock - AC'97 codec clock base (0 = auto-detect)
1270 This module supports one card and autoprobe.
1272 Note: The default index value of this module is -2, i.e. the first
1275 The power-management is supported.
1277 Module snd-interwave
1278 --------------------
1280 Module for Gravis UltraSound PnP, Dynasonic 3-D/Pro, STB Sound Rage 32
1281 and other sound cards based on AMD InterWave (tm) chip.
1283 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
1284 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
1285 pcm_voices - reserved PCM voices for the synthesizer (default 2)
1286 effect - 1 = InterWave effects enable (default 0);
1288 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1290 with isapnp=0, the following options are available:
1292 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
1293 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
1294 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
1295 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
1297 This module supports multiple cards, autoprobe and ISA PnP.
1299 Module snd-interwave-stb
1300 ------------------------
1302 Module for UltraSound 32-Pro (sound card from STB used by Compaq)
1303 and other sound cards based on AMD InterWave (tm) chip with TEA6330T
1304 circuit for extended control of bass, treble and master volume.
1306 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
1307 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
1308 pcm_voices - reserved PCM voices for the synthesizer (default 2)
1309 effect - 1 = InterWave effects enable (default 0);
1311 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1313 with isapnp=0, the following options are available:
1315 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
1316 port_tc - tone control (i2c bus) port # for TEA6330T chip (0x350,0x360,0x370,0x380)
1317 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
1318 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
1319 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
1321 This module supports multiple cards, autoprobe and ISA PnP.
1326 Module for Korg 1212 IO PCI card
1328 This module supports multiple cards.
1333 Module for Echoaudio Layla20
1335 This module supports multiple cards.
1336 The driver requires the firmware loader support on kernel.
1341 Module for Echoaudio Layla24
1343 This module supports multiple cards.
1344 The driver requires the firmware loader support on kernel.
1349 Module for Allegro/Maestro3 chips
1351 external_amp - enable external amp (enabled by default)
1352 amp_gpio - GPIO pin number for external amp (0-15) or
1353 -1 for default pin (8 for allegro, 1 for
1356 This module supports autoprobe and multiple chips.
1358 Note: the binding of amplifier is dependent on hardware.
1359 If there is no sound even though all channels are unmuted, try to
1360 specify other gpio connection via amp_gpio option.
1361 For example, a Panasonic notebook might need "amp_gpio=0x0d"
1364 The power-management is supported.
1369 Module for Echoaudio Mia
1371 This module supports multiple cards.
1372 The driver requires the firmware loader support on kernel.
1377 Module for Miro soundcards: miroSOUND PCM 1 pro,
1379 miroSOUND PCM 20 Radio.
1381 port - Port # (0x530,0x604,0xe80,0xf40)
1382 irq - IRQ # (5,7,9,10,11)
1383 dma1 - 1st dma # (0,1,3)
1384 dma2 - 2nd dma # (0,1)
1385 mpu_port - MPU-401 port # (0x300,0x310,0x320,0x330)
1386 mpu_irq - MPU-401 irq # (5,7,9,10)
1387 fm_port - FM Port # (0x388)
1388 wss - enable WSS mode
1389 ide - enable onboard ide support
1394 Module for Digigram miXart8 sound cards.
1396 This module supports multiple cards.
1397 Note: One miXart8 board will be represented as 4 alsa cards.
1398 See MIXART.txt for details.
1400 When the driver is compiled as a module and the hotplug firmware
1401 is supported, the firmware data is loaded via hotplug automatically.
1402 Install the necessary firmware files in alsa-firmware package.
1403 When no hotplug fw loader is available, you need to load the
1404 firmware via mixartloader utility in alsa-tools package.
1409 Module for Echoaudio Mona
1411 This module supports multiple cards.
1412 The driver requires the firmware loader support on kernel.
1417 Module for MPU-401 UART devices.
1419 port - port number or -1 (disable)
1420 irq - IRQ number or -1 (disable)
1421 pnp - PnP detection - 0 = disable, 1 = enable (default)
1423 This module supports multiple devices and PnP.
1428 Module for MOTU MidiTimePiece AV multiport MIDI (on the parallel
1431 port - I/O port # for MTPAV (0x378,0x278, default=0x378)
1432 irq - IRQ # for MTPAV (7,5, default=7)
1433 hwports - number of supported hardware ports, default=8.
1435 Module supports only 1 card. This module has no enable option.
1440 Module for Ego Systems (ESI) Miditerminal 4140
1442 This module supports multiple devices.
1443 Requires parport (CONFIG_PARPORT).
1448 Module for NeoMagic NM256AV/ZX chips
1450 playback_bufsize - max playback frame size in kB (4-128kB)
1451 capture_bufsize - max capture frame size in kB (4-128kB)
1452 force_ac97 - 0 or 1 (disabled by default)
1453 buffer_top - specify buffer top address
1454 use_cache - 0 or 1 (disabled by default)
1455 vaio_hack - alias buffer_top=0x25a800
1456 reset_workaround - enable AC97 RESET workaround for some laptops
1457 reset_workaround2 - enable extended AC97 RESET workaround for some
1460 This module supports one chip and autoprobe.
1462 The power-management is supported.
1464 Note: on some notebooks the buffer address cannot be detected
1465 automatically, or causes hang-up during initialization.
1466 In such a case, specify the buffer top address explicitly via
1467 the buffer_top option.
1469 Sony F250: buffer_top=0x25a800
1470 Sony F270: buffer_top=0x272800
1471 The driver supports only ac97 codec. It's possible to force
1472 to initialize/use ac97 although it's not detected. In such a
1473 case, use force_ac97=1 option - but *NO* guarantee whether it
1476 Note: The NM256 chip can be linked internally with non-AC97
1477 codecs. This driver supports only the AC97 codec, and won't work
1478 with machines with other (most likely CS423x or OPL3SAx) chips,
1479 even though the device is detected in lspci. In such a case, try
1480 other drivers, e.g. snd-cs4232 or snd-opl3sa2. Some has ISA-PnP
1481 but some doesn't have ISA PnP. You'll need to specify isapnp=0
1482 and proper hardware parameters in the case without ISA PnP.
1484 Note: some laptops need a workaround for AC97 RESET. For the
1485 known hardware like Dell Latitude LS and Sony PCG-F305, this
1486 workaround is enabled automatically. For other laptops with a
1487 hard freeze, you can try reset_workaround=1 option.
1489 Note: Dell Latitude CSx laptops have another problem regarding
1490 AC97 RESET. On these laptops, reset_workaround2 option is
1491 turned on as default. This option is worth to try if the
1492 previous reset_workaround option doesn't help.
1494 Note: This driver is really crappy. It's a porting from the
1495 OSS driver, which is a result of black-magic reverse engineering.
1496 The detection of codec will fail if the driver is loaded *after*
1497 X-server as described above. You might be able to force to load
1498 the module, but it may result in hang-up. Hence, make sure that
1499 you load this module *before* X if you encounter this kind of
1505 Module for Yamaha OPL3-SA2/SA3 sound cards.
1507 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1509 with isapnp=0, the following options are available:
1511 port - control port # for OPL3-SA chip (0x370)
1512 sb_port - SB port # for OPL3-SA chip (0x220,0x240)
1513 wss_port - WSS port # for OPL3-SA chip (0x530,0xe80,0xf40,0x604)
1514 midi_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1515 fm_port - FM port # for OPL3-SA chip (0x388), -1 = disable
1516 irq - IRQ # for OPL3-SA chip (5,7,9,10)
1517 dma1 - first DMA # for Yamaha OPL3-SA chip (0,1,3)
1518 dma2 - second DMA # for Yamaha OPL3-SA chip (0,1,3), -1 = disable
1520 This module supports multiple cards and ISA PnP. It does not support
1521 autoprobe (if ISA PnP is not used) thus all ports must be specified!!!
1523 The power-management is supported.
1525 Module snd-opti92x-ad1848
1526 -------------------------
1528 Module for sound cards based on OPTi 82c92x and Analog Devices AD1848 chips.
1529 Module works with OAK Mozart cards as well.
1531 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1533 with isapnp=0, the following options are available:
1535 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1536 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1537 fm_port - port # for OPL3 device (0x388)
1538 irq - IRQ # for WSS chip (5,7,9,10,11)
1539 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1540 dma1 - first DMA # for WSS chip (0,1,3)
1542 This module supports only one card, autoprobe and PnP.
1544 Module snd-opti92x-cs4231
1545 -------------------------
1547 Module for sound cards based on OPTi 82c92x and Crystal CS4231 chips.
1549 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1551 with isapnp=0, the following options are available:
1553 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1554 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1555 fm_port - port # for OPL3 device (0x388)
1556 irq - IRQ # for WSS chip (5,7,9,10,11)
1557 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1558 dma1 - first DMA # for WSS chip (0,1,3)
1559 dma2 - second DMA # for WSS chip (0,1,3)
1561 This module supports only one card, autoprobe and PnP.
1566 Module for sound cards based on OPTi 82c93x chips.
1568 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1570 with isapnp=0, the following options are available:
1572 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1573 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1574 fm_port - port # for OPL3 device (0x388)
1575 irq - IRQ # for WSS chip (5,7,9,10,11)
1576 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1577 dma1 - first DMA # for WSS chip (0,1,3)
1578 dma2 - second DMA # for WSS chip (0,1,3)
1580 This module supports only one card, autoprobe and PnP.
1585 Module for sound cards based on the C-Media CMI8788 chip:
1587 * AuzenTech X-Meridian
1589 * Club3D Theatron DTS
1591 * Razer Barracuda AC-1
1594 This module supports autoprobe and multiple cards.
1596 Power management is _not_ supported.
1601 Module for Digigram PCXHR boards
1603 This module supports multiple cards.
1605 Module snd-portman2x4
1606 ---------------------
1608 Module for Midiman Portman 2x4 parallel port MIDI interface
1610 This module supports multiple cards.
1612 Module snd-powermac (on ppc only)
1613 ---------------------------------
1615 Module for PowerMac, iMac and iBook on-board soundchips
1617 enable_beep - enable beep using PCM (enabled as default)
1619 Module supports autoprobe a chip.
1621 Note: the driver may have problems regarding endianess.
1623 The power-management is supported.
1625 Module snd-pxa2xx-ac97 (on arm only)
1626 ------------------------------------
1628 Module for AC97 driver for the Intel PXA2xx chip
1630 For ARM architecture only.
1632 The power-management is supported.
1637 Module for Conexant Riptide chip
1639 joystick_port - Joystick port # (default: 0x200)
1640 mpu_port - MPU401 port # (default: 0x330)
1641 opl3_port - OPL3 port # (default: 0x388)
1643 This module supports multiple cards.
1644 The driver requires the firmware loader support on kernel.
1645 You need to install the firmware file "riptide.hex" to the standard
1646 firmware path (e.g. /lib/firmware).
1651 Module for RME Digi32, Digi32 Pro and Digi32/8 (Sek'd Prodif32,
1652 Prodif96 and Prodif Gold) sound cards.
1654 This module supports multiple cards.
1659 Module for RME Digi96, Digi96/8 and Digi96/8 PRO/PAD/PST sound cards.
1661 This module supports multiple cards.
1666 Module for RME Digi9652 (Hammerfall, Hammerfall-Light) sound cards.
1668 precise_ptr - Enable precise pointer (doesn't work reliably).
1671 This module supports multiple cards.
1673 Note: snd-page-alloc module does the job which snd-hammerfall-mem
1674 module did formerly. It will allocate the buffers in advance
1675 when any RME9652 cards are found. To make the buffer
1676 allocation sure, load snd-page-alloc module in the early
1677 stage of boot sequence. See "Early Buffer Allocation"
1680 Module snd-sa11xx-uda1341 (on arm only)
1681 ---------------------------------------
1683 Module for Philips UDA1341TS on Compaq iPAQ H3600 sound card.
1685 Module supports only one card.
1686 Module has no enable and index options.
1688 The power-management is supported.
1693 Module for 8-bit SoundBlaster cards: SoundBlaster 1.0,
1697 port - port # for SB DSP chip (0x220,0x240,0x260)
1698 irq - IRQ # for SB DSP chip (5,7,9,10)
1699 dma8 - DMA # for SB DSP chip (1,3)
1701 This module supports multiple cards and autoprobe.
1703 The power-management is supported.
1705 Module snd-sb16 and snd-sbawe
1706 -----------------------------
1708 Module for 16-bit SoundBlaster cards: SoundBlaster 16 (PnP),
1709 SoundBlaster AWE 32 (PnP),
1710 SoundBlaster AWE 64 PnP
1712 mic_agc - Mic Auto-Gain-Control - 0 = disable, 1 = enable (default)
1713 csp - ASP/CSP chip support - 0 = disable (default), 1 = enable
1714 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1716 with isapnp=0, the following options are available:
1718 port - port # for SB DSP 4.x chip (0x220,0x240,0x260)
1719 mpu_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1720 awe_port - base port # for EMU8000 synthesizer (0x620,0x640,0x660)
1721 (snd-sbawe module only)
1722 irq - IRQ # for SB DSP 4.x chip (5,7,9,10)
1723 dma8 - 8-bit DMA # for SB DSP 4.x chip (0,1,3)
1724 dma16 - 16-bit DMA # for SB DSP 4.x chip (5,6,7)
1726 This module supports multiple cards, autoprobe and ISA PnP.
1728 Note: To use Vibra16X cards in 16-bit half duplex mode, you must
1729 disable 16bit DMA with dma16 = -1 module parameter.
1730 Also, all Sound Blaster 16 type cards can operate in 16-bit
1731 half duplex mode through 8-bit DMA channel by disabling their
1734 The power-management is supported.
1739 Module for Gallant SC-6000 soundcard.
1741 port - Port # (0x220 or 0x240)
1742 mss_port - MSS Port # (0x530 or 0xe80)
1743 irq - IRQ # (5,7,9,10,11)
1744 mpu_irq - MPU-401 IRQ # (5,7,9,10) ,0 - no MPU-401 irq
1747 This module supports multiple cards.
1749 This card is also known as Audio Excel DSP 16 or Zoltrix AV302.
1754 Module for Aztech Sound Galaxy sound card.
1756 sbport - Port # for SB16 interface (0x220,0x240)
1757 wssport - Port # for WSS interface (0x530,0xe80,0xf40,0x604)
1758 irq - IRQ # (7,9,10,11)
1761 This module supports multiple cards.
1763 The power-management is supported.
1768 Module for ENSONIQ SoundScape PnP cards.
1770 port - Port # (PnP setup)
1771 wss_port - WSS Port # (PnP setup)
1772 irq - IRQ # (PnP setup)
1773 mpu_irq - MPU-401 IRQ # (PnP setup)
1774 dma - DMA # (PnP setup)
1775 dma2 - 2nd DMA # (PnP setup, -1 to disable)
1777 This module supports multiple cards. ISA PnP must be enabled.
1778 You need sscape_ctl tool in alsa-tools package for loading
1781 Module snd-sun-amd7930 (on sparc only)
1782 --------------------------------------
1784 Module for AMD7930 sound chips found on Sparcs.
1786 This module supports multiple cards.
1788 Module snd-sun-cs4231 (on sparc only)
1789 -------------------------------------
1791 Module for CS4231 sound chips found on Sparcs.
1793 This module supports multiple cards.
1795 Module snd-sun-dbri (on sparc only)
1796 -----------------------------------
1798 Module for DBRI sound chips found on Sparcs.
1800 This module supports multiple cards.
1802 Module snd-wavefront
1803 --------------------
1805 Module for Turtle Beach Maui, Tropez and Tropez+ sound cards.
1807 use_cs4232_midi - Use CS4232 MPU-401 interface
1808 (inaccessibly located inside your computer)
1809 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1811 with isapnp=0, the following options are available:
1813 cs4232_pcm_port - Port # for CS4232 PCM interface.
1814 cs4232_pcm_irq - IRQ # for CS4232 PCM interface (5,7,9,11,12,15).
1815 cs4232_mpu_port - Port # for CS4232 MPU-401 interface.
1816 cs4232_mpu_irq - IRQ # for CS4232 MPU-401 interface (9,11,12,15).
1817 ics2115_port - Port # for ICS2115
1818 ics2115_irq - IRQ # for ICS2115
1819 fm_port - FM OPL-3 Port #
1820 dma1 - DMA1 # for CS4232 PCM interface.
1821 dma2 - DMA2 # for CS4232 PCM interface.
1823 The below are options for wavefront_synth features:
1824 wf_raw - Assume that we need to boot the OS (default:no)
1825 If yes, then during driver loading, the state of the board is
1826 ignored, and we reset the board and load the firmware anyway.
1827 fx_raw - Assume that the FX process needs help (default:yes)
1828 If false, we'll leave the FX processor in whatever state it is
1829 when the driver is loaded. The default is to download the
1830 microprogram and associated coefficients to set it up for
1831 "default" operation, whatever that means.
1832 debug_default - Debug parameters for card initialization
1833 wait_usecs - How long to wait without sleeping, usecs
1835 This magic number seems to give pretty optimal throughput
1836 based on my limited experimentation.
1837 If you want to play around with it and find a better value, be
1838 my guest. Remember, the idea is to get a number that causes us
1839 to just busy wait for as many WaveFront commands as possible,
1840 without coming up with a number so large that we hog the whole
1842 Specifically, with this number, out of about 134,000 status
1843 waits, only about 250 result in a sleep.
1844 sleep_interval - How long to sleep when waiting for reply
1846 sleep_tries - How many times to try sleeping during a wait
1848 ospath - Pathname to processed ICS2115 OS firmware
1849 (default:wavefront.os)
1850 The path name of the ISC2115 OS firmware. In the recent
1851 version, it's handled via firmware loader framework, so it
1852 must be installed in the proper path, typically,
1854 reset_time - How long to wait for a reset to take effect
1856 ramcheck_time - How many seconds to wait for the RAM test
1858 osrun_time - How many seconds to wait for the ICS2115 OS
1861 This module supports multiple cards and ISA PnP.
1863 Note: the firmware file "wavefront.os" was located in the earlier
1864 version in /etc. Now it's loaded via firmware loader, and
1865 must be in the proper firmware path, such as /lib/firmware.
1866 Copy (or symlink) the file appropriately if you get an error
1867 regarding firmware downloading after upgrading the kernel.
1869 Module snd-sonicvibes
1870 ---------------------
1872 Module for S3 SonicVibes PCI sound cards.
1873 * PINE Schubert 32 PCI
1875 reverb - Reverb Enable - 1 = enable, 0 = disable (default)
1876 - SoundCard must have onboard SRAM for this.
1877 mge - Mic Gain Enable - 1 = enable, 0 = disable (default)
1879 This module supports multiple cards and autoprobe.
1881 Module snd-serial-u16550
1882 ------------------------
1884 Module for UART16550A serial MIDI ports.
1886 port - port # for UART16550A chip
1887 irq - IRQ # for UART16550A chip, -1 = poll mode
1888 speed - speed in bauds (9600,19200,38400,57600,115200)
1890 base - base for divisor in bauds (57600,115200,230400,460800)
1892 outs - number of MIDI ports in a serial port (1-4)
1894 adaptor - Type of adaptor.
1895 0 = Soundcanvas, 1 = MS-124T, 2 = MS-124W S/A,
1896 3 = MS-124W M/B, 4 = Generic
1898 This module supports multiple cards. This module does not support autoprobe
1899 thus the main port must be specified!!! Other options are optional.
1904 Module for Trident 4DWave DX/NX sound cards.
1905 * Best Union Miss Melody 4DWave PCI
1907 * Warpspeed ONSpeed 4DWave PCI
1910 * CHIC True Sound 4Dwave
1911 * Shark Predator4D-PCI
1912 * Jaton SonicWave 4D
1914 pcm_channels - max channels (voices) reserved for PCM
1915 wavetable_size - max wavetable size in kB (4-?kb)
1917 This module supports multiple cards and autoprobe.
1919 The power-management is supported.
1921 Module snd-usb-audio
1922 --------------------
1924 Module for USB audio and USB MIDI devices.
1926 vid - Vendor ID for the device (optional)
1927 pid - Product ID for the device (optional)
1928 device_setup - Device specific magic number (optional)
1929 - Influence depends on the device
1932 This module supports multiple devices, autoprobe and hotplugging.
1934 Module snd-usb-caiaq
1935 --------------------
1937 Module for caiaq UB audio interfaces,
1938 * Native Instruments RigKontrol2
1939 * Native Instruments Kore Controller
1940 * Native Instruments Audio Kontrol 1
1941 * Native Instruments Audio 8 DJ
1943 This module supports multiple devices, autoprobe and hotplugging.
1945 Module snd-usb-usx2y
1946 --------------------
1948 Module for Tascam USB US-122, US-224 and US-428 devices.
1950 This module supports multiple devices, autoprobe and hotplugging.
1952 Note: you need to load the firmware via usx2yloader utility included
1953 in alsa-tools and alsa-firmware packages.
1958 Module for AC'97 motherboards based on VIA 82C686A/686B, 8233,
1959 8233A, 8233C, 8235, 8237 (south) bridge.
1961 mpu_port - 0x300,0x310,0x320,0x330, otherwise obtain BIOS setup
1963 joystick - Enable joystick (default off) [VIA686A/686B only]
1964 ac97_clock - AC'97 codec clock base (default 48000Hz)
1965 dxs_support - support DXS channels,
1966 0 = auto (default), 1 = enable, 2 = disable,
1967 3 = 48k only, 4 = no VRA, 5 = enable any sample
1968 rate and different sample rates on different
1970 [VIA8233/C, 8235, 8237 only]
1971 ac97_quirk - AC'97 workaround for strange hardware
1972 See "AC97 Quirk Option" section below.
1974 This module supports one chip and autoprobe.
1976 Note: on some SMP motherboards like MSI 694D the interrupts might
1977 not be generated properly. In such a case, please try to
1978 set the SMP (or MPS) version on BIOS to 1.1 instead of
1979 default value 1.4. Then the interrupt number will be
1980 assigned under 15. You might also upgrade your BIOS.
1982 Note: VIA8233/5/7 (not VIA8233A) can support DXS (direct sound)
1983 channels as the first PCM. On these channels, up to 4
1984 streams can be played at the same time, and the controller
1985 can perform sample rate conversion with separate rates for
1987 As default (dxs_support = 0), 48k fixed rate is chosen
1988 except for the known devices since the output is often
1989 noisy except for 48k on some mother boards due to the
1991 Please try once dxs_support=5 and if it works on other
1992 sample rates (e.g. 44.1kHz of mp3 playback), please let us
1993 know the PCI subsystem vendor/device id's (output of
1995 If dxs_support=5 does not work, try dxs_support=4; if it
1996 doesn't work too, try dxs_support=1. (dxs_support=1 is
1997 usually for old motherboards. The correct implemented
1998 board should work with 4 or 5.) If it still doesn't
1999 work and the default setting is ok, dxs_support=3 is the
2000 right choice. If the default setting doesn't work at all,
2001 try dxs_support=2 to disable the DXS channels.
2002 In any cases, please let us know the result and the
2003 subsystem vendor/device ids. See "Links and Addresses"
2006 Note: for the MPU401 on VIA823x, use snd-mpu401 driver
2007 additionally. The mpu_port option is for VIA686 chips only.
2009 The power-management is supported.
2011 Module snd-via82xx-modem
2012 ------------------------
2014 Module for VIA82xx AC97 modem
2016 ac97_clock - AC'97 codec clock base (default 48000Hz)
2018 This module supports one card and autoprobe.
2020 Note: The default index value of this module is -2, i.e. the first
2023 The power-management is supported.
2028 Module for virtual rawmidi devices.
2029 This module creates virtual rawmidi devices which communicate
2030 to the corresponding ALSA sequencer ports.
2032 midi_devs - MIDI devices # (1-4, default=4)
2034 This module supports multiple cards.
2039 Module for sound cards based on the Asus AV200 chip, i.e.,
2040 Xonar D2 and Xonar D2X.
2042 This module supports autoprobe and multiple cards.
2044 Power management is _not_ supported.
2049 Module for Digigram VX-Pocket VX222, V222 v2 and Mic cards.
2051 mic - Enable Microphone on V222 Mic (NYI)
2052 ibl - Capture IBL size. (default = 0, minimum size)
2054 This module supports multiple cards.
2056 When the driver is compiled as a module and the hotplug firmware
2057 is supported, the firmware data is loaded via hotplug automatically.
2058 Install the necessary firmware files in alsa-firmware package.
2059 When no hotplug fw loader is available, you need to load the
2060 firmware via vxloader utility in alsa-tools package. To invoke
2061 vxloader automatically, add the following to /etc/modprobe.conf
2063 install snd-vx222 /sbin/modprobe --first-time -i snd-vx222 && /usr/bin/vxloader
2065 (for 2.2/2.4 kernels, add "post-install /usr/bin/vxloader" to
2066 /etc/modules.conf, instead.)
2067 IBL size defines the interrupts period for PCM. The smaller size
2068 gives smaller latency but leads to more CPU consumption, too.
2069 The size is usually aligned to 126. As default (=0), the smallest
2070 size is chosen. The possible IBL values can be found in
2071 /proc/asound/cardX/vx-status proc file.
2073 The power-management is supported.
2078 Module for Digigram VX-Pocket VX2 and 440 PCMCIA cards.
2080 ibl - Capture IBL size. (default = 0, minimum size)
2082 This module supports multiple cards. The module is compiled only when
2083 PCMCIA is supported on kernel.
2085 With the older 2.6.x kernel, to activate the driver via the card
2086 manager, you'll need to set up /etc/pcmcia/vxpocket.conf. See the
2087 sound/pcmcia/vx/vxpocket.c. 2.6.13 or later kernel requires no
2088 longer require a config file.
2090 When the driver is compiled as a module and the hotplug firmware
2091 is supported, the firmware data is loaded via hotplug automatically.
2092 Install the necessary firmware files in alsa-firmware package.
2093 When no hotplug fw loader is available, you need to load the
2094 firmware via vxloader utility in alsa-tools package.
2096 About capture IBL, see the description of snd-vx222 module.
2098 Note: snd-vxp440 driver is merged to snd-vxpocket driver since
2101 The power-management is supported.
2106 Module for Yamaha PCI chips (YMF72x, YMF74x & YMF75x).
2108 mpu_port - 0x300,0x330,0x332,0x334, 0 (disable) by default,
2109 1 (auto-detect for YMF744/754 only)
2110 fm_port - 0x388,0x398,0x3a0,0x3a8, 0 (disable) by default
2111 1 (auto-detect for YMF744/754 only)
2112 joystick_port - 0x201,0x202,0x204,0x205, 0 (disable) by default,
2114 rear_switch - enable shared rear/line-in switch (bool)
2116 This module supports autoprobe and multiple chips.
2118 The power-management is supported.
2120 Module snd-pdaudiocf
2121 --------------------
2123 Module for Sound Core PDAudioCF sound card.
2125 The power-management is supported.
2131 The ac97_quirk option is used to enable/override the workaround for
2132 specific devices on drivers for on-board AC'97 controllers like
2133 snd-intel8x0. Some hardware have swapped output pins between Master
2134 and Headphone, or Surround (thanks to confusion of AC'97
2135 specifications from version to version :-)
2137 The driver provides the auto-detection of known problematic devices,
2138 but some might be unknown or wrongly detected. In such a case, pass
2139 the proper value with this option.
2141 The following strings are accepted:
2142 - default Don't override the default setting
2143 - none Disable the quirk
2144 - hp_only Bind Master and Headphone controls as a single control
2145 - swap_hp Swap headphone and master controls
2146 - swap_surround Swap master and surround controls
2147 - ad_sharing For AD1985, turn on OMS bit and use headphone
2148 - alc_jack For ALC65x, turn on the jack sense mode
2149 - inv_eapd Inverted EAPD implementation
2150 - mute_led Bind EAPD bit for turning on/off mute LED
2152 For backward compatibility, the corresponding integer value -1, 0,
2153 ... are accepted, too.
2155 For example, if "Master" volume control has no effect on your device
2156 but only "Headphone" does, pass ac97_quirk=hp_only module option.
2159 Configuring Non-ISAPNP Cards
2160 ============================
2162 When the kernel is configured with ISA-PnP support, the modules
2163 supporting the isapnp cards will have module options "isapnp".
2164 If this option is set, *only* the ISA-PnP devices will be probed.
2165 For probing the non ISA-PnP cards, you have to pass "isapnp=0" option
2166 together with the proper i/o and irq configuration.
2168 When the kernel is configured without ISA-PnP support, isapnp option
2169 will be not built in.
2172 Module Autoloading Support
2173 ==========================
2175 The ALSA drivers can be loaded automatically on demand by defining
2176 module aliases. The string 'snd-card-%1' is requested for ALSA native
2177 devices where %i is sound card number from zero to seven.
2179 To auto-load an ALSA driver for OSS services, define the string
2180 'sound-slot-%i' where %i means the slot number for OSS, which
2181 corresponds to the card index of ALSA. Usually, define this
2182 as the same card module.
2184 An example configuration for a single emu10k1 card is like below:
2185 ----- /etc/modprobe.conf
2186 alias snd-card-0 snd-emu10k1
2187 alias sound-slot-0 snd-emu10k1
2188 ----- /etc/modprobe.conf
2190 The available number of auto-loaded sound cards depends on the module
2191 option "cards_limit" of snd module. As default it's set to 1.
2192 To enable the auto-loading of multiple cards, specify the number of
2193 sound cards in that option.
2195 When multiple cards are available, it'd better to specify the index
2196 number for each card via module option, too, so that the order of
2197 cards is kept consistent.
2199 An example configuration for two sound cards is like below:
2201 ----- /etc/modprobe.conf
2203 options snd cards_limit=2
2204 alias snd-card-0 snd-interwave
2205 alias snd-card-1 snd-ens1371
2206 options snd-interwave index=0
2207 options snd-ens1371 index=1
2209 alias sound-slot-0 snd-interwave
2210 alias sound-slot-1 snd-ens1371
2211 ----- /etc/modprobe.conf
2213 In this example, the interwave card is always loaded as the first card
2214 (index 0) and ens1371 as the second (index 1).
2216 Alternative (and new) way to fixate the slot assignment is to use
2217 "slots" option of snd module. In the case above, specify like the
2220 options snd slots=snd-interwave,snd-ens1371
2222 Then, the first slot (#0) is reserved for snd-interwave driver, and
2223 the second (#1) for snd-ens1371. You can omit index option in each
2224 driver if slots option is used (although you can still have them at
2225 the same time as long as they don't conflict).
2227 The slots option is especially useful for avoiding the possible
2228 hot-plugging and the resultant slot conflict. For example, in the
2229 case above again, the first two slots are already reserved. If any
2230 other driver (e.g. snd-usb-audio) is loaded before snd-interwave or
2231 snd-ens1371, it will be assigned to the third or later slot.
2234 ALSA PCM devices to OSS devices mapping
2235 =======================================
2237 /dev/snd/pcmC0D0[c|p] -> /dev/audio0 (/dev/audio) -> minor 4
2238 /dev/snd/pcmC0D0[c|p] -> /dev/dsp0 (/dev/dsp) -> minor 3
2239 /dev/snd/pcmC0D1[c|p] -> /dev/adsp0 (/dev/adsp) -> minor 12
2240 /dev/snd/pcmC1D0[c|p] -> /dev/audio1 -> minor 4+16 = 20
2241 /dev/snd/pcmC1D0[c|p] -> /dev/dsp1 -> minor 3+16 = 19
2242 /dev/snd/pcmC1D1[c|p] -> /dev/adsp1 -> minor 12+16 = 28
2243 /dev/snd/pcmC2D0[c|p] -> /dev/audio2 -> minor 4+32 = 36
2244 /dev/snd/pcmC2D0[c|p] -> /dev/dsp2 -> minor 3+32 = 39
2245 /dev/snd/pcmC2D1[c|p] -> /dev/adsp2 -> minor 12+32 = 44
2247 The first number from /dev/snd/pcmC{X}D{Y}[c|p] expression means
2248 sound card number and second means device number. The ALSA devices
2249 have either 'c' or 'p' suffix indicating the direction, capture and
2250 playback, respectively.
2252 Please note that the device mapping above may be varied via the module
2253 options of snd-pcm-oss module.
2256 Proc interfaces (/proc/asound)
2257 ==============================
2259 /proc/asound/card#/pcm#[cp]/oss
2260 -------------------------------
2261 String "erase" - erase all additional informations about OSS applications
2262 String "<app_name> <fragments> <fragment_size> [<options>]"
2264 <app_name> - name of application with (higher priority) or without path
2265 <fragments> - number of fragments or zero if auto
2266 <fragment_size> - size of fragment in bytes or zero if auto
2267 <options> - optional parameters
2268 - disable the application tries to open a pcm device for
2269 this channel but does not want to use it.
2270 (Cause a bug or mmap needs)
2271 It's good for Quake etc...
2272 - direct don't use plugins
2273 - block force block mode (rvplayer)
2274 - non-block force non-block mode
2275 - whole-frag write only whole fragments (optimization affecting
2277 - no-silence do not fill silence ahead to avoid clicks
2278 - buggy-ptr Returns the whitespace blocks in GETOPTR ioctl
2279 instead of filled blocks
2281 Example: echo "x11amp 128 16384" > /proc/asound/card0/pcm0p/oss
2282 echo "squake 0 0 disable" > /proc/asound/card0/pcm0c/oss
2283 echo "rvplayer 0 0 block" > /proc/asound/card0/pcm0p/oss
2286 Early Buffer Allocation
2287 =======================
2289 Some drivers (e.g. hdsp) require the large contiguous buffers, and
2290 sometimes it's too late to find such spaces when the driver module is
2291 actually loaded due to memory fragmentation. You can pre-allocate the
2292 PCM buffers by loading snd-page-alloc module and write commands to its
2293 proc file in prior, for example, in the early boot stage like
2294 /etc/init.d/*.local scripts.
2296 Reading the proc file /proc/drivers/snd-page-alloc shows the current
2297 usage of page allocation. In writing, you can send the following
2298 commands to the snd-page-alloc driver:
2300 - add VENDOR DEVICE MASK SIZE BUFFERS
2302 VENDOR and DEVICE are PCI vendor and device IDs. They take
2303 integer numbers (0x prefix is needed for the hex).
2304 MASK is the PCI DMA mask. Pass 0 if not restricted.
2305 SIZE is the size of each buffer to allocate. You can pass
2306 k and m suffix for KB and MB. The max number is 16MB.
2307 BUFFERS is the number of buffers to allocate. It must be greater
2308 than 0. The max number is 4.
2312 This will erase the all pre-allocated buffers which are not in
2319 ALSA project homepage
2320 http://www.alsa-project.org
2322 ALSA Bug Tracking System
2323 https://bugtrack.alsa-project.org/bugs/
2326 mailto:alsa-devel@alsa-project.org
git://ftp.safe.ca / safe / jmp / linux-2.6 / blob