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.
61 - permission mask for dynamic sound device filesystem
62 - This is available only when DEVFS is enabled
64 - E.g.: device_mode=0660
70 The PCM OSS emulation module.
71 This module takes options which change the mapping of devices.
73 dsp_map - PCM device number maps assigned to the 1st OSS device.
75 adsp_map - PCM device number maps assigned to the 2st OSS device.
78 - Don't block opening busy PCM devices. Default: 1
80 For example, when dsp_map=2, /dev/dsp will be mapped to PCM #2 of
81 the card #0. Similarly, when adsp_map=0, /dev/adsp will be mapped
82 to PCM #0 of the card #0.
83 For changing the second or later card, specify the option with
84 commas, such like "dsp_map=0,1".
86 nonblock_open option is used to change the behavior of the PCM
87 regarding opening the device. When this option is non-zero,
88 opening a busy OSS PCM device won't be blocked but return
89 immediately with EAGAIN (just like O_NONBLOCK flag).
94 This module takes options which change the mapping of devices.
95 similar to those of the snd-pcm-oss module.
97 midi_map - MIDI device number maps assigned to the 1st OSS device.
99 amidi_map - MIDI device number maps assigned to the 2st OSS device.
102 Common parameters for top sound card modules
103 --------------------------------------------
105 Each of top level sound card module takes the following options.
107 index - index (slot #) of sound card
108 - Values: 0 through 31 or negative
109 - If nonnegative, assign that index number
110 - if negative, interpret as a bitmask of permissible
111 indices; the first free permitted index is assigned
113 id - card ID (identifier or name)
114 - Can be up to 15 characters long
115 - Default: the card type
116 - A directory by this name is created under /proc/asound/
117 containing information about the card
118 - This ID can be used instead of the index number in
121 - Default: enabled, for PCI and ISA PnP cards
126 Module for sound cards based on Analog Devices AD1816A/AD1815 ISA chips.
128 port - port # for AD1816A chip (PnP setup)
129 mpu_port - port # for MPU-401 UART (PnP setup)
130 fm_port - port # for OPL3 (PnP setup)
131 irq - IRQ # for AD1816A chip (PnP setup)
132 mpu_irq - IRQ # for MPU-401 UART (PnP setup)
133 dma1 - first DMA # for AD1816A chip (PnP setup)
134 dma2 - second DMA # for AD1816A chip (PnP setup)
135 clockfreq - Clock frequency for AD1816A chip (default = 0, 33000Hz)
137 This module supports multiple cards, autoprobe and PnP.
142 Module for sound cards based on AD1848/AD1847/CS4248 ISA chips.
144 port - port # for AD1848 chip
145 irq - IRQ # for AD1848 chip
146 dma1 - DMA # for AD1848 chip (0,1,3)
148 This module supports multiple cards. It does not support autoprobe
149 thus main port must be specified!!! Other ports are optional.
151 The power-management is supported.
156 Module for Analog Devices AD1889 chips.
158 ac97_quirk - AC'97 workaround for strange hardware
159 See the description of intel8x0 module for details.
161 This module supports multiple cards.
166 Module for ALi M5451 PCI chip.
168 pcm_channels - Number of hardware channels assigned for PCM
169 spdif - Support SPDIF I/O
172 This module supports one chip and autoprobe.
174 The power-management is supported.
179 Module for sound cards based on Avance Logic ALS100/ALS120 ISA chips.
181 port - port # for ALS100 (SB16) chip (PnP setup)
182 irq - IRQ # for ALS100 (SB16) chip (PnP setup)
183 dma8 - 8-bit DMA # for ALS100 (SB16) chip (PnP setup)
184 dma16 - 16-bit DMA # for ALS100 (SB16) chip (PnP setup)
185 mpu_port - port # for MPU-401 UART (PnP setup)
186 mpu_irq - IRQ # for MPU-401 (PnP setup)
187 fm_port - port # for OPL3 FM (PnP setup)
189 This module supports multiple cards, autoprobe and PnP.
191 The power-management is supported.
196 Module for sound cards based on Avance Logic ALS4000 PCI chip.
198 joystick_port - port # for legacy joystick support.
199 0 = disabled (default), 1 = auto-detect
201 This module supports multiple cards, autoprobe and PnP.
203 The power-management is supported.
208 Module for ATI IXP 150/200/250/400 AC97 controllers.
210 ac97_clock - AC'97 clock (default = 48000)
211 ac97_quirk - AC'97 workaround for strange hardware
212 See "AC97 Quirk Option" section below.
213 spdif_aclink - S/PDIF transfer over AC-link (default = 1)
215 This module supports one card and autoprobe.
217 ATI IXP has two different methods to control SPDIF output. One is
218 over AC-link and another is over the "direct" SPDIF output. The
219 implementation depends on the motherboard, and you'll need to
220 choose the correct one via spdif_aclink module option.
222 The power-management is supported.
224 Module snd-atiixp-modem
225 -----------------------
227 Module for ATI IXP 150/200/250 AC97 modem controllers.
229 This module supports one card and autoprobe.
231 Note: The default index value of this module is -2, i.e. the first
234 The power-management is supported.
236 Module snd-au8810, snd-au8820, snd-au8830
237 -----------------------------------------
239 Module for Aureal Vortex, Vortex2 and Advantage device.
241 pcifix - Control PCI workarounds
242 0 = Disable all workarounds
243 1 = Force the PCI latency of the Aureal card to 0xff
244 2 = Force the Extend PCI#2 Internal Master for Efficient
245 Handling of Dummy Requests on the VIA KT133 AGP Bridge
246 3 = Force both settings
247 255 = Autodetect what is required (default)
249 This module supports all ADB PCM channels, ac97 mixer, SPDIF, hardware
250 EQ, mpu401, gameport. A3D and wavetable support are still in development.
251 Development and reverse engineering work is being coordinated at
252 http://savannah.nongnu.org/projects/openvortex/
253 SPDIF output has a copy of the AC97 codec output, unless you use the
254 "spdif" pcm device, which allows raw data passthru.
255 The hardware EQ hardware and SPDIF is only present in the Vortex2 and
258 Note: Some ALSA mixer applications don't handle the SPDIF sample rate
259 control correctly. If you have problems regarding this, try
260 another ALSA compliant mixer (alsamixer works).
265 Module for sound cards based on Aztech System AZT2320 ISA chip (PnP only).
267 port - port # for AZT2320 chip (PnP setup)
268 wss_port - port # for WSS (PnP setup)
269 mpu_port - port # for MPU-401 UART (PnP setup)
270 fm_port - FM port # for AZT2320 chip (PnP setup)
271 irq - IRQ # for AZT2320 (WSS) chip (PnP setup)
272 mpu_irq - IRQ # for MPU-401 UART (PnP setup)
273 dma1 - 1st DMA # for AZT2320 (WSS) chip (PnP setup)
274 dma2 - 2nd DMA # for AZT2320 (WSS) chip (PnP setup)
276 This module supports multiple cards, PnP and autoprobe.
278 The power-management is supported.
283 Module for sound cards based on Aztech AZF3328 PCI chip.
285 joystick - Enable joystick (default off)
287 This module supports multiple cards.
292 Module for video cards based on Bt87x chips.
294 digital_rate - Override the default digital rate (Hz)
295 load_all - Load the driver even if the card model isn't known
297 This module supports multiple cards.
299 Note: The default index value of this module is -2, i.e. the first
305 Module for Creative Audigy LS and SB Live 24bit
307 This module supports multiple cards.
313 Module for sound cards based on C-Media CMI8330 ISA chips.
315 wssport - port # for CMI8330 chip (WSS)
316 wssirq - IRQ # for CMI8330 chip (WSS)
317 wssdma - first DMA # for CMI8330 chip (WSS)
318 sbport - port # for CMI8330 chip (SB16)
319 sbirq - IRQ # for CMI8330 chip (SB16)
320 sbdma8 - 8bit DMA # for CMI8330 chip (SB16)
321 sbdma16 - 16bit DMA # for CMI8330 chip (SB16)
323 This module supports multiple cards and autoprobe.
325 The power-management is supported.
330 Module for C-Media CMI8338 and 8738 PCI sound cards.
332 mpu_port - 0x300,0x310,0x320,0x330, 0 = disable (default)
333 fm_port - 0x388 (default), 0 = disable (default)
334 soft_ac3 - Software-conversion of raw SPDIF packets (model 033 only)
336 joystick_port - Joystick port address (0 = disable, 1 = auto-detect)
338 This module supports autoprobe and multiple cards.
340 The power-management is supported.
345 Module for sound cards based on CS4231 ISA chips.
347 port - port # for CS4231 chip
348 mpu_port - port # for MPU-401 UART (optional), -1 = disable
349 irq - IRQ # for CS4231 chip
350 mpu_irq - IRQ # for MPU-401 UART
351 dma1 - first DMA # for CS4231 chip
352 dma2 - second DMA # for CS4231 chip
354 This module supports multiple cards. This module does not support autoprobe
355 thus main port must be specified!!! Other ports are optional.
357 The power-management is supported.
362 Module for sound cards based on CS4232/CS4232A ISA chips.
364 port - port # for CS4232 chip (PnP setup - 0x534)
365 cport - control port # for CS4232 chip (PnP setup - 0x120,0x210,0xf00)
366 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
367 fm_port - FM port # for CS4232 chip (PnP setup - 0x388), -1 = disable
368 irq - IRQ # for CS4232 chip (5,7,9,11,12,15)
369 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
370 dma1 - first DMA # for CS4232 chip (0,1,3)
371 dma2 - second DMA # for Yamaha CS4232 chip (0,1,3), -1 = disable
372 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
374 This module supports multiple cards. This module does not support autoprobe
375 thus main port must be specified!!! Other ports are optional.
377 The power-management is supported.
382 Module for sound cards based on CS4235/CS4236/CS4236B/CS4237B/
383 CS4238B/CS4239 ISA chips.
385 port - port # for CS4236 chip (PnP setup - 0x534)
386 cport - control port # for CS4236 chip (PnP setup - 0x120,0x210,0xf00)
387 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
388 fm_port - FM port # for CS4236 chip (PnP setup - 0x388), -1 = disable
389 irq - IRQ # for CS4236 chip (5,7,9,11,12,15)
390 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
391 dma1 - first DMA # for CS4236 chip (0,1,3)
392 dma2 - second DMA # for CS4236 chip (0,1,3), -1 = disable
393 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
395 This module supports multiple cards. This module does not support autoprobe
396 (if ISA PnP is not used) thus main port and control port must be
397 specified!!! Other ports are optional.
399 The power-management is supported.
404 Module for Cirrus Logic CS4281 soundchip.
406 dual_codec - Secondary codec ID (0 = disable, default)
408 This module supports multiple cards.
410 The power-management is supported.
415 Module for PCI sound cards based on CS4610/CS4612/CS4614/CS4615/CS4622/
416 CS4624/CS4630/CS4280 PCI chips.
418 external_amp - Force to enable external amplifier.
419 thinkpad - Force to enable Thinkpad's CLKRUN control.
420 mmap_valid - Support OSS mmap mode (default = 0).
422 This module supports multiple cards and autoprobe.
423 Usually external amp and CLKRUN controls are detected automatically
424 from PCI sub vendor/device ids. If they don't work, give the options
427 The power-management is supported.
429 Module snd-cs5535audio
430 ----------------------
432 Module for multifunction CS5535 companion PCI device
434 This module supports multiple cards.
439 Module for Diamond Technologies DT-019X / Avance Logic ALS-007 (PnP
442 port - Port # (PnP setup)
443 mpu_port - Port # for MPU-401 (PnP setup)
444 fm_port - Port # for FM OPL-3 (PnP setup)
445 irq - IRQ # (PnP setup)
446 mpu_irq - IRQ # for MPU-401 (PnP setup)
447 dma8 - DMA # (PnP setup)
449 This module supports multiple cards. This module is enabled only with
452 The power-management is supported.
457 Module for the dummy sound card. This "card" doesn't do any output
458 or input, but you may use this module for any application which
459 requires a sound card (like RealPlayer).
461 The power-management is supported.
466 Module for EMU10K1/EMU10k2 based PCI sound cards.
467 * Sound Blaster Live!
468 * Sound Blaster PCI 512
469 * Emu APS (partially supported)
470 * Sound Blaster Audigy
472 extin - bitmap of available external inputs for FX8010 (see bellow)
473 extout - bitmap of available external outputs for FX8010 (see bellow)
474 seq_ports - allocated sequencer ports (4 by default)
475 max_synth_voices - limit of voices used for wavetable (64 by default)
476 max_buffer_size - specifies the maximum size of wavetable/pcm buffers
477 given in MB unit. Default value is 128.
478 enable_ir - enable IR
480 This module supports multiple cards and autoprobe.
482 Input & Output configurations [extin/extout]
483 * Creative Card wo/Digital out [0x0003/0x1f03]
484 * Creative Card w/Digital out [0x0003/0x1f0f]
485 * Creative Card w/Digital CD in [0x000f/0x1f0f]
486 * Creative Card wo/Digital out + LiveDrive [0x3fc3/0x1fc3]
487 * Creative Card w/Digital out + LiveDrive [0x3fc3/0x1fcf]
488 * Creative Card w/Digital CD in + LiveDrive [0x3fcf/0x1fcf]
489 * Creative Card wo/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
490 * Creative Card w/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
491 * Creative Card w/Digital CD in + Digital I/O 2 [0x0fcf/0x1f0f]
492 * Creative Card 5.1/w Digital out + LiveDrive [0x3fc3/0x1fff]
493 * Creative Card 5.1 (c) 2003 [0x3fc3/0x7cff]
494 * Creative Card all ins and outs [0x3fff/0x7fff]
496 The power-management is supported.
501 Module for Creative Emu10k1X (SB Live Dell OEM version)
503 This module supports multiple cards.
508 Module for Ensoniq AudioPCI ES1370 PCI sound cards.
509 * SoundBlaster PCI 64
510 * SoundBlaster PCI 128
512 joystick - Enable joystick (default off)
514 This module supports multiple cards and autoprobe.
516 The power-management is supported.
521 Module for Ensoniq AudioPCI ES1371 PCI sound cards.
522 * SoundBlaster PCI 64
523 * SoundBlaster PCI 128
524 * SoundBlaster Vibra PCI
526 joystick_port - port # for joystick (0x200,0x208,0x210,0x218),
527 0 = disable (default), 1 = auto-detect
529 This module supports multiple cards and autoprobe.
531 The power-management is supported.
536 Module for sound cards based on ESS ES968 chip (PnP only).
538 port - port # for ES968 (SB8) chip (PnP setup)
539 irq - IRQ # for ES968 (SB8) chip (PnP setup)
540 dma1 - DMA # for ES968 (SB8) chip (PnP setup)
542 This module supports multiple cards, PnP and autoprobe.
544 The power-management is supported.
549 Module for ESS AudioDrive ES-1688 and ES-688 sound cards.
551 port - port # for ES-1688 chip (0x220,0x240,0x260)
552 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
553 irq - IRQ # for ES-1688 chip (5,7,9,10)
554 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
555 dma8 - DMA # for ES-1688 chip (0,1,3)
557 This module supports multiple cards and autoprobe (without MPU-401 port).
562 Module for ESS AudioDrive ES-18xx sound cards.
564 port - port # for ES-18xx chip (0x220,0x240,0x260)
565 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
566 fm_port - port # for FM (optional, not used)
567 irq - IRQ # for ES-18xx chip (5,7,9,10)
568 dma1 - first DMA # for ES-18xx chip (0,1,3)
569 dma2 - first DMA # for ES-18xx chip (0,1,3)
570 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
572 This module supports multiple cards, ISA PnP and autoprobe (without MPU-401
573 port if native ISA PnP routines are not used).
574 When dma2 is equal with dma1, the driver works as half-duplex.
576 The power-management is supported.
581 Module for sound cards based on ESS Solo-1 (ES1938,ES1946) chips.
583 This module supports multiple cards and autoprobe.
585 The power-management is supported.
590 Module for sound cards based on ESS Maestro-1/2/2E (ES1968/ES1978) chips.
592 total_bufsize - total buffer size in kB (1-4096kB)
593 pcm_substreams_p - playback channels (1-8, default=2)
594 pcm_substreams_c - capture channels (1-8, default=0)
595 clock - clock (0 = auto-detection)
596 use_pm - support the power-management (0 = off, 1 = on,
598 enable_mpu - enable MPU401 (0 = off, 1 = on, 2 = auto (default))
599 joystick - enable joystick (default off)
601 This module supports multiple cards and autoprobe.
603 The power-management is supported.
608 Module for ForteMedia FM801 based PCI sound cards.
610 tea575x_tuner - Enable TEA575x tuner
611 - 1 = MediaForte 256-PCS
612 - 2 = MediaForte 256-PCPR
613 - 3 = MediaForte 64-PCR
614 - High 16-bits are video (radio) device number + 1
615 - example: 0x10002 (MediaForte 256-PCPR, device 1)
617 This module supports multiple cards and autoprobe.
619 The power-management is supported.
621 Module snd-gusclassic
622 ---------------------
624 Module for Gravis UltraSound Classic sound card.
626 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
627 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
628 dma1 - DMA # for GF1 chip (1,3,5,6,7)
629 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
630 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
631 voices - GF1 voices limit (14-32)
632 pcm_voices - reserved PCM voices
634 This module supports multiple cards and autoprobe.
636 Module snd-gusextreme
637 ---------------------
639 Module for Gravis UltraSound Extreme (Synergy ViperMax) sound card.
641 port - port # for ES-1688 chip (0x220,0x230,0x240,0x250,0x260)
642 gf1_port - port # for GF1 chip (0x210,0x220,0x230,0x240,0x250,0x260,0x270)
643 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable
644 irq - IRQ # for ES-1688 chip (5,7,9,10)
645 gf1_irq - IRQ # for GF1 chip (3,5,9,11,12,15)
646 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
647 dma8 - DMA # for ES-1688 chip (0,1,3)
648 dma1 - DMA # for GF1 chip (1,3,5,6,7)
649 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
650 voices - GF1 voices limit (14-32)
651 pcm_voices - reserved PCM voices
653 This module supports multiple cards and autoprobe (without MPU-401 port).
658 Module for Gravis UltraSound MAX sound card.
660 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
661 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
662 dma1 - DMA # for GF1 chip (1,3,5,6,7)
663 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
664 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
665 voices - GF1 voices limit (14-32)
666 pcm_voices - reserved PCM voices
668 This module supports multiple cards and autoprobe.
673 Module for Intel HD Audio (ICH6, ICH6M, ICH7), ATI SB450,
676 model - force the model name
677 position_fix - Fix DMA pointer (0 = auto, 1 = none, 2 = POSBUF, 3 = FIFO size)
678 single_cmd - Use single immediate commands to communicate with
679 codecs (for debugging only)
681 This module supports one card and autoprobe.
683 Each codec may have a model table for different configurations.
684 If your machine isn't listed there, the default (usually minimal)
685 configuration is set up. You can pass "model=<name>" option to
686 specify a certain model in such a case. There are different
687 models depending on the codec chip.
689 Model name Description
690 ---------- -----------
692 3stack 3-jack in back and a headphone out
693 3stack-digout 3-jack in back, a HP out and a SPDIF out
694 5stack 5-jack in back, 2-jack in front
695 5stack-digout 5-jack in back, 2-jack in front, a SPDIF out
696 6stack 6-jack in back, 2-jack in front
697 6stack-digout 6-jack with a SPDIF out
699 z71v 3-jack (HP shared SPDIF)
703 lg LG laptop (m1 express dual)
704 test for testing/debugging purpose, almost all controls can be
705 adjusted. Appearing only when compiled with
707 auto auto-config reading BIOS (default)
711 fujitsu Fujitsu S7020
713 basic fixed pin assignment (old default model)
714 auto auto-config reading BIOS (default)
717 fujitsu Fujitsu Laptop
718 basic fixed pin assignment w/o SPDIF
719 auto auto-config reading BIOS (default)
722 3stack-dig 3-jack with SPDIF I/O
723 6stck-dig 6-jack digital with SPDIF I/O
724 auto auto-config reading BIOS (default)
728 3stack-dig 3-jack with SPDIF I/O
729 6stack-dig 6-jack with SPDIF I/O
730 auto auto-config reading BIOS (default)
733 minimal 3-jack in back
734 min_fp 3-jack in back, 2-jack in front
735 full 6-jack in back, 2-jack in front
736 full_dig 6-jack in back, 2-jack in front, SPDIF I/O
737 allout 5-jack in back, 2-jack in front, SPDIF out
738 auto auto-config reading BIOS (default)
740 If the default configuration doesn't work and one of the above
741 matches with your device, report it together with the PCI
742 subsystem ID (output of "lspci -nv") to ALSA BTS or alsa-devel
743 ML (see the section "Links and Addresses").
745 Note 2: If you get click noises on output, try the module option
746 position_fix=1 or 2. position_fix=1 will use the SD_LPIB
747 register value without FIFO size correction as the current
748 DMA pointer. position_fix=2 will make the driver to use
749 the position buffer instead of reading SD_LPIB register.
750 (Usually SD_LPLIB register is more accurate than the
753 NB: If you get many "azx_get_response timeout" messages at
754 loading, it's likely a problem of interrupts (e.g. ACPI irq
755 routing). Try to boot with options like "pci=noacpi". Also, you
756 can try "single_cmd=1" module option. This will switch the
757 communication method between HDA controller and codecs to the
758 single immediate commands instead of CORB/RIRB. Basically, the
759 single command mode is provided only for BIOS, and you won't get
760 unsolicited events, too. But, at least, this works independently
761 from the irq. Remember this is a last resort, and should be
762 avoided as much as possible...
764 The power-management is supported.
769 Module for RME Hammerfall DSP audio interface(s)
771 This module supports multiple cards.
773 Note: The firmware data can be automatically loaded via hotplug
774 when CONFIG_FW_LOADER is set. Otherwise, you need to load
775 the firmware via hdsploader utility included in alsa-tools
777 The firmware data is found in alsa-firmware package.
779 Note: snd-page-alloc module does the job which snd-hammerfall-mem
780 module did formerly. It will allocate the buffers in advance
781 when any HDSP cards are found. To make the buffer
782 allocation sure, load snd-page-alloc module in the early
783 stage of boot sequence. See "Early Buffer Allocation"
789 Module for RME HDSP MADI board.
791 precise_ptr - Enable precise pointer, or disable.
792 line_outs_monitor - Send playback streams to analog outs by default.
793 enable_monitor - Enable Analog Out on Channel 63/64 by default.
795 See hdspm.txt for details.
800 Module for Envy24 (ICE1712) based PCI sound cards.
801 * MidiMan M Audio Delta 1010
802 * MidiMan M Audio Delta 1010LT
803 * MidiMan M Audio Delta DiO 2496
804 * MidiMan M Audio Delta 66
805 * MidiMan M Audio Delta 44
806 * MidiMan M Audio Delta 410
807 * MidiMan M Audio Audiophile 2496
813 * Hoontech SoundTrack DSP 24
814 * Hoontech SoundTrack DSP 24 Value
815 * Hoontech SoundTrack DSP 24 Media 7.1
816 * Event Electronics, EZ8
818 * Lionstracs, Mediastaton
820 model - Use the given board model, one of the following:
821 delta1010, dio2496, delta66, delta44, audiophile, delta410,
822 delta1010lt, vx442, ewx2496, ews88mt, ews88mt_new, ews88d,
823 dmx6fire, dsp24, dsp24_value, dsp24_71, ez8,
824 phase88, mediastation
825 omni - Omni I/O support for MidiMan M-Audio Delta44/66
826 cs8427_timeout - reset timeout for the CS8427 chip (S/PDIF transciever)
827 in msec resolution, default value is 500 (0.5 sec)
829 This module supports multiple cards and autoprobe. Note: The consumer part
830 is not used with all Envy24 based cards (for example in the MidiMan Delta
833 Note: The supported board is detected by reading EEPROM or PCI
834 SSID (if EEPROM isn't available). You can override the
835 model by passing "model" module option in case that the
836 driver isn't configured properly or you want to try another
842 Module for Envy24HT (VT/ICE1724), Envy24PT (VT1720) based PCI sound cards.
843 * MidiMan M Audio Revolution 5.1
844 * MidiMan M Audio Revolution 7.1
846 * TerraTec Aureon 5.1 Sky
847 * TerraTec Aureon 7.1 Space
848 * TerraTec Aureon 7.1 Universe
851 * AudioTrak Prodigy 7.1
852 * AudioTrak Prodigy 7.1LT
853 * AudioTrak Prodigy 192
855 * Albatron K8X800 Pro II
862 model - Use the given board model, one of the following:
863 revo51, revo71, amp2000, prodigy71, prodigy71lt,
864 prodigy192, aureon51, aureon71, universe,
865 k8x800, phase22, phase28, ms300, av710
867 This module supports multiple cards and autoprobe.
869 Note: The supported board is detected by reading EEPROM or PCI
870 SSID (if EEPROM isn't available). You can override the
871 model by passing "model" module option in case that the
872 driver isn't configured properly or you want to try another
878 Module for AC'97 motherboards from Intel and compatibles.
879 * Intel i810/810E, i815, i820, i830, i84x, MX440
880 ICH5, ICH6, ICH7, ESB2
882 * NVidia NForce, NForce2, NForce3, MCP04, CK804
884 * AMD AMD768, AMD8111
887 ac97_clock - AC'97 codec clock base (0 = auto-detect)
888 ac97_quirk - AC'97 workaround for strange hardware
889 See "AC97 Quirk Option" section below.
890 buggy_irq - Enable workaround for buggy interrupts on some
891 motherboards (default yes on nForce chips,
893 buggy_semaphore - Enable workaround for hardwares with buggy
894 semaphores (e.g. on some ASUS laptops)
897 This module supports one chip and autoprobe.
899 Note: the latest driver supports auto-detection of chip clock.
900 if you still encounter too fast playback, specify the clock
901 explicitly via the module option "ac97_clock=41194".
903 Joystick/MIDI ports are not supported by this driver. If your
904 motherboard has these devices, use the ns558 or snd-mpu401
905 modules, respectively.
907 The power-management is supported.
912 Module for Intel ICH (i8x0) chipset MC97 modems.
913 * Intel i810/810E, i815, i820, i830, i84x, MX440
916 * NVidia NForce, NForce2, NForce2s, NForce3
920 ac97_clock - AC'97 codec clock base (0 = auto-detect)
922 This module supports one card and autoprobe.
924 Note: The default index value of this module is -2, i.e. the first
927 The power-management is supported.
932 Module for Gravis UltraSound PnP, Dynasonic 3-D/Pro, STB Sound Rage 32
933 and other sound cards based on AMD InterWave (tm) chip.
935 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
936 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
937 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
938 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
939 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
940 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
941 pcm_voices - reserved PCM voices for the synthesizer (default 2)
942 effect - 1 = InterWave effects enable (default 0);
945 This module supports multiple cards, autoprobe and ISA PnP.
947 Module snd-interwave-stb
948 ------------------------
950 Module for UltraSound 32-Pro (sound card from STB used by Compaq)
951 and other sound cards based on AMD InterWave (tm) chip with TEA6330T
952 circuit for extended control of bass, treble and master volume.
954 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
955 port_tc - tone control (i2c bus) port # for TEA6330T chip (0x350,0x360,0x370,0x380)
956 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
957 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
958 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
959 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
960 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
961 pcm_voices - reserved PCM voices for the synthesizer (default 2)
962 effect - 1 = InterWave effects enable (default 0);
965 This module supports multiple cards, autoprobe and ISA PnP.
970 Module for Korg 1212 IO PCI card
972 This module supports multiple cards.
977 Module for Allegro/Maestro3 chips
979 external_amp - enable external amp (enabled by default)
980 amp_gpio - GPIO pin number for external amp (0-15) or
981 -1 for default pin (8 for allegro, 1 for
984 This module supports autoprobe and multiple chips.
986 Note: the binding of amplifier is dependent on hardware.
987 If there is no sound even though all channels are unmuted, try to
988 specify other gpio connection via amp_gpio option.
989 For example, a Panasonic notebook might need "amp_gpio=0x0d"
992 The power-management is supported.
997 Module for Digigram miXart8 sound cards.
999 This module supports multiple cards.
1000 Note: One miXart8 board will be represented as 4 alsa cards.
1001 See MIXART.txt for details.
1003 When the driver is compiled as a module and the hotplug firmware
1004 is supported, the firmware data is loaded via hotplug automatically.
1005 Install the necessary firmware files in alsa-firmware package.
1006 When no hotplug fw loader is available, you need to load the
1007 firmware via mixartloader utility in alsa-tools package.
1012 Module for MPU-401 UART devices.
1014 port - port number or -1 (disable)
1015 irq - IRQ number or -1 (disable)
1016 pnp - PnP detection - 0 = disable, 1 = enable (default)
1018 This module supports multiple devices and PnP.
1023 Module for MOTU MidiTimePiece AV multiport MIDI (on the parallel
1026 port - I/O port # for MTPAV (0x378,0x278, default=0x378)
1027 irq - IRQ # for MTPAV (7,5, default=7)
1028 hwports - number of supported hardware ports, default=8.
1030 Module supports only 1 card. This module has no enable option.
1035 Module for NeoMagic NM256AV/ZX chips
1037 playback_bufsize - max playback frame size in kB (4-128kB)
1038 capture_bufsize - max capture frame size in kB (4-128kB)
1039 force_ac97 - 0 or 1 (disabled by default)
1040 buffer_top - specify buffer top address
1041 use_cache - 0 or 1 (disabled by default)
1042 vaio_hack - alias buffer_top=0x25a800
1043 reset_workaround - enable AC97 RESET workaround for some laptops
1044 reset_workaround2 - enable extended AC97 RESET workaround for some
1047 This module supports one chip and autoprobe.
1049 The power-management is supported.
1051 Note: on some notebooks the buffer address cannot be detected
1052 automatically, or causes hang-up during initialization.
1053 In such a case, specify the buffer top address explicity via
1056 Sony F250: buffer_top=0x25a800
1057 Sony F270: buffer_top=0x272800
1058 The driver supports only ac97 codec. It's possible to force
1059 to initialize/use ac97 although it's not detected. In such a
1060 case, use force_ac97=1 option - but *NO* guarantee whether it
1063 Note: The NM256 chip can be linked internally with non-AC97
1064 codecs. This driver supports only the AC97 codec, and won't work
1065 with machines with other (most likely CS423x or OPL3SAx) chips,
1066 even though the device is detected in lspci. In such a case, try
1067 other drivers, e.g. snd-cs4232 or snd-opl3sa2. Some has ISA-PnP
1068 but some doesn't have ISA PnP. You'll need to specify isapnp=0
1069 and proper hardware parameters in the case without ISA PnP.
1071 Note: some laptops need a workaround for AC97 RESET. For the
1072 known hardware like Dell Latitude LS and Sony PCG-F305, this
1073 workaround is enabled automatically. For other laptops with a
1074 hard freeze, you can try reset_workaround=1 option.
1076 Note: Dell Latitude CSx laptops have another problem regarding
1077 AC97 RESET. On these laptops, reset_workaround2 option is
1078 turned on as default. This option is worth to try if the
1079 previous reset_workaround option doesn't help.
1081 Note: This driver is really crappy. It's a porting from the
1082 OSS driver, which is a result of black-magic reverse engineering.
1083 The detection of codec will fail if the driver is loaded *after*
1084 X-server as described above. You might be able to force to load
1085 the module, but it may result in hang-up. Hence, make sure that
1086 you load this module *before* X if you encounter this kind of
1092 Module for Yamaha OPL3-SA2/SA3 sound cards.
1094 port - control port # for OPL3-SA chip (0x370)
1095 sb_port - SB port # for OPL3-SA chip (0x220,0x240)
1096 wss_port - WSS port # for OPL3-SA chip (0x530,0xe80,0xf40,0x604)
1097 midi_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1098 fm_port - FM port # for OPL3-SA chip (0x388), -1 = disable
1099 irq - IRQ # for OPL3-SA chip (5,7,9,10)
1100 dma1 - first DMA # for Yamaha OPL3-SA chip (0,1,3)
1101 dma2 - second DMA # for Yamaha OPL3-SA chip (0,1,3), -1 = disable
1102 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1104 This module supports multiple cards and ISA PnP. It does not support
1105 autoprobe (if ISA PnP is not used) thus all ports must be specified!!!
1107 The power-management is supported.
1109 Module snd-opti92x-ad1848
1110 -------------------------
1112 Module for sound cards based on OPTi 82c92x and Analog Devices AD1848 chips.
1113 Module works with OAK Mozart cards as well.
1115 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1116 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1117 fm_port - port # for OPL3 device (0x388)
1118 irq - IRQ # for WSS chip (5,7,9,10,11)
1119 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1120 dma1 - first DMA # for WSS chip (0,1,3)
1122 This module supports only one card, autoprobe and PnP.
1124 Module snd-opti92x-cs4231
1125 -------------------------
1127 Module for sound cards based on OPTi 82c92x and Crystal CS4231 chips.
1129 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1130 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1131 fm_port - port # for OPL3 device (0x388)
1132 irq - IRQ # for WSS chip (5,7,9,10,11)
1133 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1134 dma1 - first DMA # for WSS chip (0,1,3)
1135 dma2 - second DMA # for WSS chip (0,1,3)
1137 This module supports only one card, autoprobe and PnP.
1142 Module for sound cards based on OPTi 82c93x chips.
1144 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1145 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1146 fm_port - port # for OPL3 device (0x388)
1147 irq - IRQ # for WSS chip (5,7,9,10,11)
1148 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1149 dma1 - first DMA # for WSS chip (0,1,3)
1150 dma2 - second DMA # for WSS chip (0,1,3)
1152 This module supports only one card, autoprobe and PnP.
1157 Module for Digigram PCXHR boards
1159 This module supports multiple cards.
1161 Module snd-powermac (on ppc only)
1162 ---------------------------------
1164 Module for PowerMac, iMac and iBook on-board soundchips
1166 enable_beep - enable beep using PCM (enabled as default)
1168 Module supports autoprobe a chip.
1170 Note: the driver may have problems regarding endianess.
1172 The power-management is supported.
1174 Module snd-pxa2xx-ac97 (on arm only)
1175 ------------------------------------
1177 Module for AC97 driver for the Intel PXA2xx chip
1179 For ARM architecture only.
1181 The power-management is supported.
1186 Module for RME Digi32, Digi32 Pro and Digi32/8 (Sek'd Prodif32,
1187 Prodif96 and Prodif Gold) sound cards.
1189 This module supports multiple cards.
1194 Module for RME Digi96, Digi96/8 and Digi96/8 PRO/PAD/PST sound cards.
1196 This module supports multiple cards.
1201 Module for RME Digi9652 (Hammerfall, Hammerfall-Light) sound cards.
1203 precise_ptr - Enable precise pointer (doesn't work reliably).
1206 This module supports multiple cards.
1208 Note: snd-page-alloc module does the job which snd-hammerfall-mem
1209 module did formerly. It will allocate the buffers in advance
1210 when any RME9652 cards are found. To make the buffer
1211 allocation sure, load snd-page-alloc module in the early
1212 stage of boot sequence. See "Early Buffer Allocation"
1215 Module snd-sa11xx-uda1341 (on arm only)
1216 ---------------------------------------
1218 Module for Philips UDA1341TS on Compaq iPAQ H3600 sound card.
1220 Module supports only one card.
1221 Module has no enable and index options.
1223 The power-management is supported.
1228 Module for 8-bit SoundBlaster cards: SoundBlaster 1.0,
1232 port - port # for SB DSP chip (0x220,0x240,0x260)
1233 irq - IRQ # for SB DSP chip (5,7,9,10)
1234 dma8 - DMA # for SB DSP chip (1,3)
1236 This module supports multiple cards and autoprobe.
1238 The power-management is supported.
1240 Module snd-sb16 and snd-sbawe
1241 -----------------------------
1243 Module for 16-bit SoundBlaster cards: SoundBlaster 16 (PnP),
1244 SoundBlaster AWE 32 (PnP),
1245 SoundBlaster AWE 64 PnP
1247 port - port # for SB DSP 4.x chip (0x220,0x240,0x260)
1248 mpu_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1249 awe_port - base port # for EMU8000 synthesizer (0x620,0x640,0x660)
1250 (snd-sbawe module only)
1251 irq - IRQ # for SB DSP 4.x chip (5,7,9,10)
1252 dma8 - 8-bit DMA # for SB DSP 4.x chip (0,1,3)
1253 dma16 - 16-bit DMA # for SB DSP 4.x chip (5,6,7)
1254 mic_agc - Mic Auto-Gain-Control - 0 = disable, 1 = enable (default)
1255 csp - ASP/CSP chip support - 0 = disable (default), 1 = enable
1256 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1258 This module supports multiple cards, autoprobe and ISA PnP.
1260 Note: To use Vibra16X cards in 16-bit half duplex mode, you must
1261 disable 16bit DMA with dma16 = -1 module parameter.
1262 Also, all Sound Blaster 16 type cards can operate in 16-bit
1263 half duplex mode through 8-bit DMA channel by disabling their
1266 The power-management is supported.
1271 Module for Aztech Sound Galaxy sound card.
1273 sbport - Port # for SB16 interface (0x220,0x240)
1274 wssport - Port # for WSS interface (0x530,0xe80,0xf40,0x604)
1275 irq - IRQ # (7,9,10,11)
1278 This module supports multiple cards.
1280 The power-management is supported.
1285 Module for ENSONIQ SoundScape PnP cards.
1287 port - Port # (PnP setup)
1288 irq - IRQ # (PnP setup)
1289 mpu_irq - MPU-401 IRQ # (PnP setup)
1290 dma - DMA # (PnP setup)
1292 This module supports multiple cards. ISA PnP must be enabled.
1293 You need sscape_ctl tool in alsa-tools package for loading
1296 Module snd-sun-amd7930 (on sparc only)
1297 --------------------------------------
1299 Module for AMD7930 sound chips found on Sparcs.
1301 This module supports multiple cards.
1303 Module snd-sun-cs4231 (on sparc only)
1304 -------------------------------------
1306 Module for CS4231 sound chips found on Sparcs.
1308 This module supports multiple cards.
1310 Module snd-sun-dbri (on sparc only)
1311 -----------------------------------
1313 Module for DBRI sound chips found on Sparcs.
1315 This module supports multiple cards.
1317 Module snd-wavefront
1318 --------------------
1320 Module for Turtle Beach Maui, Tropez and Tropez+ sound cards.
1322 cs4232_pcm_port - Port # for CS4232 PCM interface.
1323 cs4232_pcm_irq - IRQ # for CS4232 PCM interface (5,7,9,11,12,15).
1324 cs4232_mpu_port - Port # for CS4232 MPU-401 interface.
1325 cs4232_mpu_irq - IRQ # for CS4232 MPU-401 interface (9,11,12,15).
1326 use_cs4232_midi - Use CS4232 MPU-401 interface
1327 (inaccessibly located inside your computer)
1328 ics2115_port - Port # for ICS2115
1329 ics2115_irq - IRQ # for ICS2115
1330 fm_port - FM OPL-3 Port #
1331 dma1 - DMA1 # for CS4232 PCM interface.
1332 dma2 - DMA2 # for CS4232 PCM interface.
1333 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1335 This module supports multiple cards and ISA PnP.
1337 Module snd-sonicvibes
1338 ---------------------
1340 Module for S3 SonicVibes PCI sound cards.
1341 * PINE Schubert 32 PCI
1343 reverb - Reverb Enable - 1 = enable, 0 = disable (default)
1344 - SoundCard must have onboard SRAM for this.
1345 mge - Mic Gain Enable - 1 = enable, 0 = disable (default)
1347 This module supports multiple cards and autoprobe.
1349 Module snd-serial-u16550
1350 ------------------------
1352 Module for UART16550A serial MIDI ports.
1354 port - port # for UART16550A chip
1355 irq - IRQ # for UART16550A chip, -1 = poll mode
1356 speed - speed in bauds (9600,19200,38400,57600,115200)
1358 base - base for divisor in bauds (57600,115200,230400,460800)
1360 outs - number of MIDI ports in a serial port (1-4)
1362 adaptor - Type of adaptor.
1363 0 = Soundcanvas, 1 = MS-124T, 2 = MS-124W S/A,
1364 3 = MS-124W M/B, 4 = Generic
1366 This module supports multiple cards. This module does not support autoprobe
1367 thus the main port must be specified!!! Other options are optional.
1372 Module for Trident 4DWave DX/NX sound cards.
1373 * Best Union Miss Melody 4DWave PCI
1375 * Warpspeed ONSpeed 4DWave PCI
1378 * CHIC True Sound 4Dwave
1379 * Shark Predator4D-PCI
1380 * Jaton SonicWave 4D
1382 pcm_channels - max channels (voices) reserved for PCM
1383 wavetable_size - max wavetable size in kB (4-?kb)
1385 This module supports multiple cards and autoprobe.
1387 The power-management is supported.
1389 Module snd-usb-audio
1390 --------------------
1392 Module for USB audio and USB MIDI devices.
1394 vid - Vendor ID for the device (optional)
1395 pid - Product ID for the device (optional)
1397 This module supports multiple devices, autoprobe and hotplugging.
1399 Module snd-usb-usx2y
1400 --------------------
1402 Module for Tascam USB US-122, US-224 and US-428 devices.
1404 This module supports multiple devices, autoprobe and hotplugging.
1406 Note: you need to load the firmware via usx2yloader utility included
1407 in alsa-tools and alsa-firmware packages.
1412 Module for AC'97 motherboards based on VIA 82C686A/686B, 8233,
1413 8233A, 8233C, 8235, 8237 (south) bridge.
1415 mpu_port - 0x300,0x310,0x320,0x330, otherwise obtain BIOS setup
1417 joystick - Enable joystick (default off) [VIA686A/686B only]
1418 ac97_clock - AC'97 codec clock base (default 48000Hz)
1419 dxs_support - support DXS channels,
1420 0 = auto (default), 1 = enable, 2 = disable,
1421 3 = 48k only, 4 = no VRA, 5 = enable any sample
1422 rate and different sample rates on different
1424 [VIA8233/C, 8235, 8237 only]
1425 ac97_quirk - AC'97 workaround for strange hardware
1426 See "AC97 Quirk Option" section below.
1428 This module supports one chip and autoprobe.
1430 Note: on some SMP motherboards like MSI 694D the interrupts might
1431 not be generated properly. In such a case, please try to
1432 set the SMP (or MPS) version on BIOS to 1.1 instead of
1433 default value 1.4. Then the interrupt number will be
1434 assigned under 15. You might also upgrade your BIOS.
1436 Note: VIA8233/5/7 (not VIA8233A) can support DXS (direct sound)
1437 channels as the first PCM. On these channels, up to 4
1438 streams can be played at the same time, and the controller
1439 can perform sample rate conversion with separate rates for
1441 As default (dxs_support = 0), 48k fixed rate is chosen
1442 except for the known devices since the output is often
1443 noisy except for 48k on some mother boards due to the
1445 Please try once dxs_support=5 and if it works on other
1446 sample rates (e.g. 44.1kHz of mp3 playback), please let us
1447 know the PCI subsystem vendor/device id's (output of
1449 If dxs_support=5 does not work, try dxs_support=4; if it
1450 doesn't work too, try dxs_support=1. (dxs_support=1 is
1451 usually for old motherboards. The correct implemented
1452 board should work with 4 or 5.) If it still doesn't
1453 work and the default setting is ok, dxs_support=3 is the
1454 right choice. If the default setting doesn't work at all,
1455 try dxs_support=2 to disable the DXS channels.
1456 In any cases, please let us know the result and the
1457 subsystem vendor/device ids. See "Links and Addresses"
1460 Note: for the MPU401 on VIA823x, use snd-mpu401 driver
1461 additionally. The mpu_port option is for VIA686 chips only.
1463 The power-management is supported.
1465 Module snd-via82xx-modem
1466 ------------------------
1468 Module for VIA82xx AC97 modem
1470 ac97_clock - AC'97 codec clock base (default 48000Hz)
1472 This module supports one card and autoprobe.
1474 Note: The default index value of this module is -2, i.e. the first
1477 The power-management is supported.
1482 Module for virtual rawmidi devices.
1483 This module creates virtual rawmidi devices which communicate
1484 to the corresponding ALSA sequencer ports.
1486 midi_devs - MIDI devices # (1-4, default=4)
1488 This module supports multiple cards.
1493 Module for Digigram VX-Pocket VX222, V222 v2 and Mic cards.
1495 mic - Enable Microphone on V222 Mic (NYI)
1496 ibl - Capture IBL size. (default = 0, minimum size)
1498 This module supports multiple cards.
1500 When the driver is compiled as a module and the hotplug firmware
1501 is supported, the firmware data is loaded via hotplug automatically.
1502 Install the necessary firmware files in alsa-firmware package.
1503 When no hotplug fw loader is available, you need to load the
1504 firmware via vxloader utility in alsa-tools package. To invoke
1505 vxloader automatically, add the following to /etc/modprobe.conf
1507 install snd-vx222 /sbin/modprobe --first-time -i snd-vx222 && /usr/bin/vxloader
1509 (for 2.2/2.4 kernels, add "post-install /usr/bin/vxloader" to
1510 /etc/modules.conf, instead.)
1511 IBL size defines the interrupts period for PCM. The smaller size
1512 gives smaller latency but leads to more CPU consumption, too.
1513 The size is usually aligned to 126. As default (=0), the smallest
1514 size is chosen. The possible IBL values can be found in
1515 /proc/asound/cardX/vx-status proc file.
1517 The power-management is supported.
1522 Module for Digigram VX-Pocket VX2 and 440 PCMCIA cards.
1524 ibl - Capture IBL size. (default = 0, minimum size)
1526 This module supports multiple cards. The module is compiled only when
1527 PCMCIA is supported on kernel.
1529 With the older 2.6.x kernel, to activate the driver via the card
1530 manager, you'll need to set up /etc/pcmcia/vxpocket.conf. See the
1531 sound/pcmcia/vx/vxpocket.c. 2.6.13 or later kernel requires no
1532 longer require a config file.
1534 When the driver is compiled as a module and the hotplug firmware
1535 is supported, the firmware data is loaded via hotplug automatically.
1536 Install the necessary firmware files in alsa-firmware package.
1537 When no hotplug fw loader is available, you need to load the
1538 firmware via vxloader utility in alsa-tools package.
1540 About capture IBL, see the description of snd-vx222 module.
1542 Note: the driver is build only when CONFIG_ISA is set.
1544 Note2: snd-vxp440 driver is merged to snd-vxpocket driver since
1547 The power-management is supported.
1552 Module for Yamaha PCI chips (YMF72x, YMF74x & YMF75x).
1554 mpu_port - 0x300,0x330,0x332,0x334, 0 (disable) by default,
1555 1 (auto-detect for YMF744/754 only)
1556 fm_port - 0x388,0x398,0x3a0,0x3a8, 0 (disable) by default
1557 1 (auto-detect for YMF744/754 only)
1558 joystick_port - 0x201,0x202,0x204,0x205, 0 (disable) by default,
1560 rear_switch - enable shared rear/line-in switch (bool)
1562 This module supports autoprobe and multiple chips.
1564 The power-management is supported.
1566 Module snd-pdaudiocf
1567 --------------------
1569 Module for Sound Core PDAudioCF sound card.
1571 Note: the driver is build only when CONFIG_ISA is set.
1573 The power-management is supported.
1579 The ac97_quirk option is used to enable/override the workaround for
1580 specific devices on drivers for on-board AC'97 controllers like
1581 snd-intel8x0. Some hardware have swapped output pins between Master
1582 and Headphone, or Surround (thanks to confusion of AC'97
1583 specifications from version to version :-)
1585 The driver provides the auto-detection of known problematic devices,
1586 but some might be unknown or wrongly detected. In such a case, pass
1587 the proper value with this option.
1589 The following strings are accepted:
1590 - default Don't override the default setting
1591 - none Disable the quirk
1592 - hp_only Bind Master and Headphone controls as a single control
1593 - swap_hp Swap headphone and master controls
1594 - swap_surround Swap master and surround controls
1595 - ad_sharing For AD1985, turn on OMS bit and use headphone
1596 - alc_jack For ALC65x, turn on the jack sense mode
1597 - inv_eapd Inverted EAPD implementation
1598 - mute_led Bind EAPD bit for turning on/off mute LED
1600 For backward compatibility, the corresponding integer value -1, 0,
1601 ... are accepted, too.
1603 For example, if "Master" volume control has no effect on your device
1604 but only "Headphone" does, pass ac97_quirk=hp_only module option.
1607 Configuring Non-ISAPNP Cards
1608 ============================
1610 When the kernel is configured with ISA-PnP support, the modules
1611 supporting the isapnp cards will have module options "isapnp".
1612 If this option is set, *only* the ISA-PnP devices will be probed.
1613 For probing the non ISA-PnP cards, you have to pass "isapnp=0" option
1614 together with the proper i/o and irq configuration.
1616 When the kernel is configured without ISA-PnP support, isapnp option
1617 will be not built in.
1620 Module Autoloading Support
1621 ==========================
1623 The ALSA drivers can be loaded automatically on demand by defining
1624 module aliases. The string 'snd-card-%1' is requested for ALSA native
1625 devices where %i is sound card number from zero to seven.
1627 To auto-load an ALSA driver for OSS services, define the string
1628 'sound-slot-%i' where %i means the slot number for OSS, which
1629 corresponds to the card index of ALSA. Usually, define this
1630 as the same card module.
1632 An example configuration for a single emu10k1 card is like below:
1633 ----- /etc/modprobe.conf
1634 alias snd-card-0 snd-emu10k1
1635 alias sound-slot-0 snd-emu10k1
1636 ----- /etc/modprobe.conf
1638 The available number of auto-loaded sound cards depends on the module
1639 option "cards_limit" of snd module. As default it's set to 1.
1640 To enable the auto-loading of multiple cards, specify the number of
1641 sound cards in that option.
1643 When multiple cards are available, it'd better to specify the index
1644 number for each card via module option, too, so that the order of
1645 cards is kept consistent.
1647 An example configuration for two sound cards is like below:
1649 ----- /etc/modprobe.conf
1651 options snd cards_limit=2
1652 alias snd-card-0 snd-interwave
1653 alias snd-card-1 snd-ens1371
1654 options snd-interwave index=0
1655 options snd-ens1371 index=1
1657 alias sound-slot-0 snd-interwave
1658 alias sound-slot-1 snd-ens1371
1659 ----- /etc/moprobe.conf
1661 In this example, the interwave card is always loaded as the first card
1662 (index 0) and ens1371 as the second (index 1).
1665 ALSA PCM devices to OSS devices mapping
1666 =======================================
1668 /dev/snd/pcmC0D0[c|p] -> /dev/audio0 (/dev/audio) -> minor 4
1669 /dev/snd/pcmC0D0[c|p] -> /dev/dsp0 (/dev/dsp) -> minor 3
1670 /dev/snd/pcmC0D1[c|p] -> /dev/adsp0 (/dev/adsp) -> minor 12
1671 /dev/snd/pcmC1D0[c|p] -> /dev/audio1 -> minor 4+16 = 20
1672 /dev/snd/pcmC1D0[c|p] -> /dev/dsp1 -> minor 3+16 = 19
1673 /dev/snd/pcmC1D1[c|p] -> /dev/adsp1 -> minor 12+16 = 28
1674 /dev/snd/pcmC2D0[c|p] -> /dev/audio2 -> minor 4+32 = 36
1675 /dev/snd/pcmC2D0[c|p] -> /dev/dsp2 -> minor 3+32 = 39
1676 /dev/snd/pcmC2D1[c|p] -> /dev/adsp2 -> minor 12+32 = 44
1678 The first number from /dev/snd/pcmC{X}D{Y}[c|p] expression means
1679 sound card number and second means device number. The ALSA devices
1680 have either 'c' or 'p' suffix indicating the direction, capture and
1681 playback, respectively.
1683 Please note that the device mapping above may be varied via the module
1684 options of snd-pcm-oss module.
1690 The ALSA driver fully supports the devfs extension.
1691 You should add lines below to your devfsd.conf file:
1693 LOOKUP snd MODLOAD ACTION snd
1694 REGISTER ^sound/.* PERMISSIONS root.audio 660
1695 REGISTER ^snd/.* PERMISSIONS root.audio 660
1697 Warning: These lines assume that you have the audio group in your system.
1698 Otherwise replace audio word with another group name (root for
1702 Proc interfaces (/proc/asound)
1703 ==============================
1705 /proc/asound/card#/pcm#[cp]/oss
1706 -------------------------------
1707 String "erase" - erase all additional informations about OSS applications
1708 String "<app_name> <fragments> <fragment_size> [<options>]"
1710 <app_name> - name of application with (higher priority) or without path
1711 <fragments> - number of fragments or zero if auto
1712 <fragment_size> - size of fragment in bytes or zero if auto
1713 <options> - optional parameters
1714 - disable the application tries to open a pcm device for
1715 this channel but does not want to use it.
1716 (Cause a bug or mmap needs)
1717 It's good for Quake etc...
1718 - direct don't use plugins
1719 - block force block mode (rvplayer)
1720 - non-block force non-block mode
1721 - whole-frag write only whole fragments (optimization affecting
1723 - no-silence do not fill silence ahead to avoid clicks
1724 - buggy-ptr Returns the whitespace blocks in GETOPTR ioctl
1725 instead of filled blocks
1727 Example: echo "x11amp 128 16384" > /proc/asound/card0/pcm0p/oss
1728 echo "squake 0 0 disable" > /proc/asound/card0/pcm0c/oss
1729 echo "rvplayer 0 0 block" > /proc/asound/card0/pcm0p/oss
1732 Early Buffer Allocation
1733 =======================
1735 Some drivers (e.g. hdsp) require the large contiguous buffers, and
1736 sometimes it's too late to find such spaces when the driver module is
1737 actually loaded due to memory fragmentation. You can pre-allocate the
1738 PCM buffers by loading snd-page-alloc module and write commands to its
1739 proc file in prior, for example, in the early boot stage like
1740 /etc/init.d/*.local scripts.
1742 Reading the proc file /proc/drivers/snd-page-alloc shows the current
1743 usage of page allocation. In writing, you can send the following
1744 commands to the snd-page-alloc driver:
1746 - add VENDOR DEVICE MASK SIZE BUFFERS
1748 VENDOR and DEVICE are PCI vendor and device IDs. They take
1749 integer numbers (0x prefix is needed for the hex).
1750 MASK is the PCI DMA mask. Pass 0 if not restricted.
1751 SIZE is the size of each buffer to allocate. You can pass
1752 k and m suffix for KB and MB. The max number is 16MB.
1753 BUFFERS is the number of buffers to allocate. It must be greater
1754 than 0. The max number is 4.
1758 This will erase the all pre-allocated buffers which are not in
1765 ALSA project homepage
1766 http://www.alsa-project.org
1768 ALSA Bug Tracking System
1769 https://bugtrack.alsa-project.org/bugs/
1772 mailto:alsa-devel@lists.sourceforge.net
git://ftp.safe.ca / safe / jmp / linux-2.6 / blob