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 7 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 Module supports up to 8 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 Module supports up to 8 cards. This module does not support autoprobe
149 thus main port must be specified!!! Other ports are optional.
154 Module for Analog Devices AD1889 chips.
156 ac97_quirk - AC'97 workaround for strange hardware
157 See the description of intel8x0 module for details.
159 This module supports up to 8 cards.
164 Module for ALi M5451 PCI chip.
166 pcm_channels - Number of hardware channels assigned for PCM
167 spdif - Support SPDIF I/O
170 Module supports autoprobe and multiple chips (max 8).
172 The power-management is supported.
177 Module for sound cards based on Avance Logic ALS100/ALS120 ISA chips.
179 port - port # for ALS100 (SB16) chip (PnP setup)
180 irq - IRQ # for ALS100 (SB16) chip (PnP setup)
181 dma8 - 8-bit DMA # for ALS100 (SB16) chip (PnP setup)
182 dma16 - 16-bit DMA # for ALS100 (SB16) chip (PnP setup)
183 mpu_port - port # for MPU-401 UART (PnP setup)
184 mpu_irq - IRQ # for MPU-401 (PnP setup)
185 fm_port - port # for OPL3 FM (PnP setup)
187 Module supports up to 8 cards, autoprobe and PnP.
192 Module for sound cards based on Avance Logic ALS4000 PCI chip.
194 joystick_port - port # for legacy joystick support.
195 0 = disabled (default), 1 = auto-detect
197 Module supports up to 8 cards, autoprobe and PnP.
202 Module for ATI IXP 150/200/250/400 AC97 controllers.
204 ac97_clock - AC'97 clock (default = 48000)
205 ac97_quirk - AC'97 workaround for strange hardware
206 See "AC97 Quirk Option" section below.
207 spdif_aclink - S/PDIF transfer over AC-link (default = 1)
209 This module supports up to 8 cards and autoprobe.
211 ATI IXP has two different methods to control SPDIF output. One is
212 over AC-link and another is over the "direct" SPDIF output. The
213 implementation depends on the motherboard, and you'll need to
214 choose the correct one via spdif_aclink module option.
216 Module snd-atiixp-modem
217 -----------------------
219 Module for ATI IXP 150/200/250 AC97 modem controllers.
221 Module supports up to 8 cards.
223 Note: The default index value of this module is -2, i.e. the first
226 Module snd-au8810, snd-au8820, snd-au8830
227 -----------------------------------------
229 Module for Aureal Vortex, Vortex2 and Advantage device.
231 pcifix - Control PCI workarounds
232 0 = Disable all workarounds
233 1 = Force the PCI latency of the Aureal card to 0xff
234 2 = Force the Extend PCI#2 Internal Master for Efficient
235 Handling of Dummy Requests on the VIA KT133 AGP Bridge
236 3 = Force both settings
237 255 = Autodetect what is required (default)
239 This module supports all ADB PCM channels, ac97 mixer, SPDIF, hardware
240 EQ, mpu401, gameport. A3D and wavetable support are still in development.
241 Development and reverse engineering work is being coordinated at
242 http://savannah.nongnu.org/projects/openvortex/
243 SPDIF output has a copy of the AC97 codec output, unless you use the
244 "spdif" pcm device, which allows raw data passthru.
245 The hardware EQ hardware and SPDIF is only present in the Vortex2 and
248 Note: Some ALSA mixer applications don't handle the SPDIF sample rate
249 control correctly. If you have problems regarding this, try
250 another ALSA compliant mixer (alsamixer works).
255 Module for sound cards based on Aztech System AZT2320 ISA chip (PnP only).
257 port - port # for AZT2320 chip (PnP setup)
258 wss_port - port # for WSS (PnP setup)
259 mpu_port - port # for MPU-401 UART (PnP setup)
260 fm_port - FM port # for AZT2320 chip (PnP setup)
261 irq - IRQ # for AZT2320 (WSS) chip (PnP setup)
262 mpu_irq - IRQ # for MPU-401 UART (PnP setup)
263 dma1 - 1st DMA # for AZT2320 (WSS) chip (PnP setup)
264 dma2 - 2nd DMA # for AZT2320 (WSS) chip (PnP setup)
266 Module supports up to 8 cards, PnP and autoprobe.
271 Module for sound cards based on Aztech AZF3328 PCI chip.
273 joystick - Enable joystick (default off)
275 Module supports up to 8 cards.
280 Module for video cards based on Bt87x chips.
282 digital_rate - Override the default digital rate (Hz)
283 load_all - Load the driver even if the card model isn't known
285 Module supports up to 8 cards.
287 Note: The default index value of this module is -2, i.e. the first
293 Module for Creative Audigy LS and SB Live 24bit
295 Module supports up to 8 cards.
301 Module for sound cards based on C-Media CMI8330 ISA chips.
303 wssport - port # for CMI8330 chip (WSS)
304 wssirq - IRQ # for CMI8330 chip (WSS)
305 wssdma - first DMA # for CMI8330 chip (WSS)
306 sbport - port # for CMI8330 chip (SB16)
307 sbirq - IRQ # for CMI8330 chip (SB16)
308 sbdma8 - 8bit DMA # for CMI8330 chip (SB16)
309 sbdma16 - 16bit DMA # for CMI8330 chip (SB16)
311 Module supports up to 8 cards and autoprobe.
316 Module for C-Media CMI8338 and 8738 PCI sound cards.
318 mpu_port - 0x300,0x310,0x320,0x330, 0 = disable (default)
319 fm_port - 0x388 (default), 0 = disable (default)
320 soft_ac3 - Software-conversion of raw SPDIF packets (model 033 only)
322 joystick_port - Joystick port address (0 = disable, 1 = auto-detect)
324 Module supports autoprobe and multiple chips (max 8).
329 Module for sound cards based on CS4231 ISA chips.
331 port - port # for CS4231 chip
332 mpu_port - port # for MPU-401 UART (optional), -1 = disable
333 irq - IRQ # for CS4231 chip
334 mpu_irq - IRQ # for MPU-401 UART
335 dma1 - first DMA # for CS4231 chip
336 dma2 - second DMA # for CS4231 chip
338 Module supports up to 8 cards. This module does not support autoprobe
339 thus main port must be specified!!! Other ports are optional.
341 The power-management is supported.
346 Module for sound cards based on CS4232/CS4232A ISA chips.
348 port - port # for CS4232 chip (PnP setup - 0x534)
349 cport - control port # for CS4232 chip (PnP setup - 0x120,0x210,0xf00)
350 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
351 fm_port - FM port # for CS4232 chip (PnP setup - 0x388), -1 = disable
352 irq - IRQ # for CS4232 chip (5,7,9,11,12,15)
353 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
354 dma1 - first DMA # for CS4232 chip (0,1,3)
355 dma2 - second DMA # for Yamaha CS4232 chip (0,1,3), -1 = disable
356 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
358 Module supports up to 8 cards. This module does not support autoprobe
359 thus main port must be specified!!! Other ports are optional.
361 The power-management is supported.
366 Module for sound cards based on CS4235/CS4236/CS4236B/CS4237B/
367 CS4238B/CS4239 ISA chips.
369 port - port # for CS4236 chip (PnP setup - 0x534)
370 cport - control port # for CS4236 chip (PnP setup - 0x120,0x210,0xf00)
371 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
372 fm_port - FM port # for CS4236 chip (PnP setup - 0x388), -1 = disable
373 irq - IRQ # for CS4236 chip (5,7,9,11,12,15)
374 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
375 dma1 - first DMA # for CS4236 chip (0,1,3)
376 dma2 - second DMA # for CS4236 chip (0,1,3), -1 = disable
377 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
379 Module supports up to 8 cards. This module does not support autoprobe
380 (if ISA PnP is not used) thus main port and control port must be
381 specified!!! Other ports are optional.
383 The power-management is supported.
388 Module for Cirrus Logic CS4281 soundchip.
390 dual_codec - Secondary codec ID (0 = disable, default)
392 Module supports up to 8 cards.
394 The power-management is supported.
399 Module for PCI sound cards based on CS4610/CS4612/CS4614/CS4615/CS4622/
400 CS4624/CS4630/CS4280 PCI chips.
402 external_amp - Force to enable external amplifier.
403 thinkpad - Force to enable Thinkpad's CLKRUN control.
404 mmap_valid - Support OSS mmap mode (default = 0).
406 Module supports up to 8 cards and autoprobe.
407 Usually external amp and CLKRUN controls are detected automatically
408 from PCI sub vendor/device ids. If they don't work, give the options
411 The power-management is supported.
416 Module for Diamond Technologies DT-019X / Avance Logic ALS-007 (PnP
419 port - Port # (PnP setup)
420 mpu_port - Port # for MPU-401 (PnP setup)
421 fm_port - Port # for FM OPL-3 (PnP setup)
422 irq - IRQ # (PnP setup)
423 mpu_irq - IRQ # for MPU-401 (PnP setup)
424 dma8 - DMA # (PnP setup)
426 Module supports up to 8 cards. This module is enabled only with
432 Module for the dummy sound card. This "card" doesn't do any output
433 or input, but you may use this module for any application which
434 requires a sound card (like RealPlayer).
439 Module for EMU10K1/EMU10k2 based PCI sound cards.
440 * Sound Blaster Live!
441 * Sound Blaster PCI 512
442 * Emu APS (partially supported)
443 * Sound Blaster Audigy
445 extin - bitmap of available external inputs for FX8010 (see bellow)
446 extout - bitmap of available external outputs for FX8010 (see bellow)
447 seq_ports - allocated sequencer ports (4 by default)
448 max_synth_voices - limit of voices used for wavetable (64 by default)
449 max_buffer_size - specifies the maximum size of wavetable/pcm buffers
450 given in MB unit. Default value is 128.
451 enable_ir - enable IR
453 Module supports up to 8 cards and autoprobe.
455 Input & Output configurations [extin/extout]
456 * Creative Card wo/Digital out [0x0003/0x1f03]
457 * Creative Card w/Digital out [0x0003/0x1f0f]
458 * Creative Card w/Digital CD in [0x000f/0x1f0f]
459 * Creative Card wo/Digital out + LiveDrive [0x3fc3/0x1fc3]
460 * Creative Card w/Digital out + LiveDrive [0x3fc3/0x1fcf]
461 * Creative Card w/Digital CD in + LiveDrive [0x3fcf/0x1fcf]
462 * Creative Card wo/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
463 * Creative Card w/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
464 * Creative Card w/Digital CD in + Digital I/O 2 [0x0fcf/0x1f0f]
465 * Creative Card 5.1/w Digital out + LiveDrive [0x3fc3/0x1fff]
466 * Creative Card 5.1 (c) 2003 [0x3fc3/0x7cff]
467 * Creative Card all ins and outs [0x3fff/0x7fff]
472 Module for Creative Emu10k1X (SB Live Dell OEM version)
474 Module supports up to 8 cards.
479 Module for Ensoniq AudioPCI ES1370 PCI sound cards.
480 * SoundBlaster PCI 64
481 * SoundBlaster PCI 128
483 joystick - Enable joystick (default off)
485 Module supports up to 8 cards and autoprobe.
490 Module for Ensoniq AudioPCI ES1371 PCI sound cards.
491 * SoundBlaster PCI 64
492 * SoundBlaster PCI 128
493 * SoundBlaster Vibra PCI
495 joystick_port - port # for joystick (0x200,0x208,0x210,0x218),
496 0 = disable (default), 1 = auto-detect
498 Module supports up to 8 cards and autoprobe.
503 Module for sound cards based on ESS ES968 chip (PnP only).
505 port - port # for ES968 (SB8) chip (PnP setup)
506 irq - IRQ # for ES968 (SB8) chip (PnP setup)
507 dma1 - DMA # for ES968 (SB8) chip (PnP setup)
509 Module supports up to 8 cards, PnP and autoprobe.
514 Module for ESS AudioDrive ES-1688 and ES-688 sound cards.
516 port - port # for ES-1688 chip (0x220,0x240,0x260)
517 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
518 irq - IRQ # for ES-1688 chip (5,7,9,10)
519 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
520 dma8 - DMA # for ES-1688 chip (0,1,3)
522 Module supports up to 8 cards and autoprobe (without MPU-401 port).
527 Module for ESS AudioDrive ES-18xx sound cards.
529 port - port # for ES-18xx chip (0x220,0x240,0x260)
530 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
531 fm_port - port # for FM (optional, not used)
532 irq - IRQ # for ES-18xx chip (5,7,9,10)
533 dma1 - first DMA # for ES-18xx chip (0,1,3)
534 dma2 - first DMA # for ES-18xx chip (0,1,3)
535 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
537 Module supports up to 8 cards ISA PnP and autoprobe (without MPU-401 port
538 if native ISA PnP routines are not used).
539 When dma2 is equal with dma1, the driver works as half-duplex.
541 The power-management is supported.
546 Module for sound cards based on ESS Solo-1 (ES1938,ES1946) chips.
548 Module supports up to 8 cards and autoprobe.
553 Module for sound cards based on ESS Maestro-1/2/2E (ES1968/ES1978) chips.
555 total_bufsize - total buffer size in kB (1-4096kB)
556 pcm_substreams_p - playback channels (1-8, default=2)
557 pcm_substreams_c - capture channels (1-8, default=0)
558 clock - clock (0 = auto-detection)
559 use_pm - support the power-management (0 = off, 1 = on,
561 enable_mpu - enable MPU401 (0 = off, 1 = on, 2 = auto (default))
562 joystick - enable joystick (default off)
564 Module supports up to 8 cards and autoprobe.
566 The power-management is supported.
571 Module for ForteMedia FM801 based PCI sound cards.
573 tea575x_tuner - Enable TEA575x tuner
574 - 1 = MediaForte 256-PCS
575 - 2 = MediaForte 256-PCPR
576 - 3 = MediaForte 64-PCR
577 - High 16-bits are video (radio) device number + 1
578 - example: 0x10002 (MediaForte 256-PCPR, device 1)
580 Module supports up to 8 cards and autoprobe.
582 Module snd-gusclassic
583 ---------------------
585 Module for Gravis UltraSound Classic sound card.
587 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
588 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
589 dma1 - DMA # for GF1 chip (1,3,5,6,7)
590 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
591 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
592 voices - GF1 voices limit (14-32)
593 pcm_voices - reserved PCM voices
595 Module supports up to 8 cards and autoprobe.
597 Module snd-gusextreme
598 ---------------------
600 Module for Gravis UltraSound Extreme (Synergy ViperMax) sound card.
602 port - port # for ES-1688 chip (0x220,0x230,0x240,0x250,0x260)
603 gf1_port - port # for GF1 chip (0x210,0x220,0x230,0x240,0x250,0x260,0x270)
604 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable
605 irq - IRQ # for ES-1688 chip (5,7,9,10)
606 gf1_irq - IRQ # for GF1 chip (3,5,9,11,12,15)
607 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
608 dma8 - DMA # for ES-1688 chip (0,1,3)
609 dma1 - DMA # for GF1 chip (1,3,5,6,7)
610 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
611 voices - GF1 voices limit (14-32)
612 pcm_voices - reserved PCM voices
614 Module supports up to 8 cards and autoprobe (without MPU-401 port).
619 Module for Gravis UltraSound MAX sound card.
621 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
622 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
623 dma1 - DMA # for GF1 chip (1,3,5,6,7)
624 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
625 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
626 voices - GF1 voices limit (14-32)
627 pcm_voices - reserved PCM voices
629 Module supports up to 8 cards and autoprobe.
634 Module for Intel HD Audio (ICH6, ICH6M, ICH7), ATI SB450,
637 model - force the model name
638 position_fix - Fix DMA pointer (0 = auto, 1 = none, 2 = POSBUF, 3 = FIFO size)
640 Module supports up to 8 cards.
642 Each codec may have a model table for different configurations.
643 If your machine isn't listed there, the default (usually minimal)
644 configuration is set up. You can pass "model=<name>" option to
645 specify a certain model in such a case. There are different
646 models depending on the codec chip.
648 Model name Description
649 ---------- -----------
651 3stack 3-jack in back and a headphone out
652 3stack-digout 3-jack in back, a HP out and a SPDIF out
653 5stack 5-jack in back, 2-jack in front
654 5stack-digout 5-jack in back, 2-jack in front, a SPDIF out
655 6stack 6-jack in back, 2-jack in front
656 6stack-digout 6-jack with a SPDIF out
658 z71v 3-jack (HP shared SPDIF)
662 test for testing/debugging purpose, almost all controls can be
663 adjusted. Appearing only when compiled with
667 minimal 3-jack in back
668 min_fp 3-jack in back, 2-jack in front
669 full 6-jack in back, 2-jack in front
670 full_dig 6-jack in back, 2-jack in front, SPDIF I/O
671 allout 5-jack in back, 2-jack in front, SPDIF out
672 auto auto-config reading BIOS (default)
674 If the default configuration doesn't work and one of the above
675 matches with your device, report it together with the PCI
676 subsystem ID (output of "lspci -nv") to ALSA BTS or alsa-devel
677 ML (see the section "Links and Addresses").
679 Note 2: If you get click noises on output, try the module option
680 position_fix=1 or 2. position_fix=1 will use the SD_LPIB
681 register value without FIFO size correction as the current
682 DMA pointer. position_fix=2 will make the driver to use
683 the position buffer instead of reading SD_LPIB register.
684 (Usually SD_LPLIB register is more accurate than the
690 Module for RME Hammerfall DSP audio interface(s)
692 Module supports up to 8 cards.
694 Note: The firmware data can be automatically loaded via hotplug
695 when CONFIG_FW_LOADER is set. Otherwise, you need to load
696 the firmware via hdsploader utility included in alsa-tools
698 The firmware data is found in alsa-firmware package.
700 Note: snd-page-alloc module does the job which snd-hammerfall-mem
701 module did formerly. It will allocate the buffers in advance
702 when any HDSP cards are found. To make the buffer
703 allocation sure, load snd-page-alloc module in the early
704 stage of boot sequence. See "Early Buffer Allocation"
710 Module for RME HDSP MADI board.
712 precise_ptr - Enable precise pointer, or disable.
713 line_outs_monitor - Send playback streams to analog outs by default.
714 enable_monitor - Enable Analog Out on Channel 63/64 by default.
716 See hdspm.txt for details.
721 Module for Envy24 (ICE1712) based PCI sound cards.
722 * MidiMan M Audio Delta 1010
723 * MidiMan M Audio Delta 1010LT
724 * MidiMan M Audio Delta DiO 2496
725 * MidiMan M Audio Delta 66
726 * MidiMan M Audio Delta 44
727 * MidiMan M Audio Delta 410
728 * MidiMan M Audio Audiophile 2496
734 * Hoontech SoundTrack DSP 24
735 * Hoontech SoundTrack DSP 24 Value
736 * Hoontech SoundTrack DSP 24 Media 7.1
737 * Event Electronics, EZ8
739 * Lionstracs, Mediastaton
741 model - Use the given board model, one of the following:
742 delta1010, dio2496, delta66, delta44, audiophile, delta410,
743 delta1010lt, vx442, ewx2496, ews88mt, ews88mt_new, ews88d,
744 dmx6fire, dsp24, dsp24_value, dsp24_71, ez8,
745 phase88, mediastation
746 omni - Omni I/O support for MidiMan M-Audio Delta44/66
747 cs8427_timeout - reset timeout for the CS8427 chip (S/PDIF transciever)
748 in msec resolution, default value is 500 (0.5 sec)
750 Module supports up to 8 cards and autoprobe. Note: The consumer part
751 is not used with all Envy24 based cards (for example in the MidiMan Delta
754 Note: The supported board is detected by reading EEPROM or PCI
755 SSID (if EEPROM isn't available). You can override the
756 model by passing "model" module option in case that the
757 driver isn't configured properly or you want to try another
763 Module for Envy24HT (VT/ICE1724), Envy24PT (VT1720) based PCI sound cards.
764 * MidiMan M Audio Revolution 7.1
766 * TerraTec Aureon 5.1 Sky
767 * TerraTec Aureon 7.1 Space
768 * TerraTec Aureon 7.1 Universe
771 * AudioTrak Prodigy 7.1
772 * AudioTrak Prodigy 192
774 * Albatron K8X800 Pro II
781 model - Use the given board model, one of the following:
782 revo71, amp2000, prodigy71, prodigy192, aureon51,
783 aureon71, universe, k8x800, phase22, phase28, ms300,
786 Module supports up to 8 cards and autoprobe.
788 Note: The supported board is detected by reading EEPROM or PCI
789 SSID (if EEPROM isn't available). You can override the
790 model by passing "model" module option in case that the
791 driver isn't configured properly or you want to try another
797 Module for AC'97 motherboards from Intel and compatibles.
798 * Intel i810/810E, i815, i820, i830, i84x, MX440
800 * NVidia NForce, NForce2
801 * AMD AMD768, AMD8111
804 ac97_clock - AC'97 codec clock base (0 = auto-detect)
805 ac97_quirk - AC'97 workaround for strange hardware
806 See "AC97 Quirk Option" section below.
807 buggy_irq - Enable workaround for buggy interrupts on some
808 motherboards (default off)
810 Module supports autoprobe and multiple bus-master chips (max 8).
812 Note: the latest driver supports auto-detection of chip clock.
813 if you still encounter too fast playback, specify the clock
814 explicitly via the module option "ac97_clock=41194".
816 Joystick/MIDI ports are not supported by this driver. If your
817 motherboard has these devices, use the ns558 or snd-mpu401
818 modules, respectively.
820 The power-management is supported.
825 Module for Intel ICH (i8x0) chipset MC97 modems.
827 ac97_clock - AC'97 codec clock base (0 = auto-detect)
829 This module supports up to 8 cards and autoprobe.
831 Note: The default index value of this module is -2, i.e. the first
837 Module for Gravis UltraSound PnP, Dynasonic 3-D/Pro, STB Sound Rage 32
838 and other sound cards based on AMD InterWave (tm) chip.
840 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
841 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
842 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
843 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
844 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
845 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
846 pcm_voices - reserved PCM voices for the synthesizer (default 2)
847 effect - 1 = InterWave effects enable (default 0);
850 Module supports up to 8 cards, autoprobe and ISA PnP.
852 Module snd-interwave-stb
853 ------------------------
855 Module for UltraSound 32-Pro (sound card from STB used by Compaq)
856 and other sound cards based on AMD InterWave (tm) chip with TEA6330T
857 circuit for extended control of bass, treble and master volume.
859 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
860 port_tc - tone control (i2c bus) port # for TEA6330T chip (0x350,0x360,0x370,0x380)
861 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
862 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
863 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
864 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
865 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
866 pcm_voices - reserved PCM voices for the synthesizer (default 2)
867 effect - 1 = InterWave effects enable (default 0);
870 Module supports up to 8 cards, autoprobe and ISA PnP.
875 Module for Korg 1212 IO PCI card
877 Module supports up to 8 cards.
882 Module for Allegro/Maestro3 chips
884 external_amp - enable external amp (enabled by default)
885 amp_gpio - GPIO pin number for external amp (0-15) or
886 -1 for default pin (8 for allegro, 1 for
889 Module supports autoprobe and multiple chips (max 8).
891 Note: the binding of amplifier is dependent on hardware.
892 If there is no sound even though all channels are unmuted, try to
893 specify other gpio connection via amp_gpio option.
894 For example, a Panasonic notebook might need "amp_gpio=0x0d"
897 The power-management is supported.
902 Module for Digigram miXart8 sound cards.
904 Module supports multiple cards.
905 Note: One miXart8 board will be represented as 4 alsa cards.
906 See MIXART.txt for details.
908 When the driver is compiled as a module and the hotplug firmware
909 is supported, the firmware data is loaded via hotplug automatically.
910 Install the necessary firmware files in alsa-firmware package.
911 When no hotplug fw loader is available, you need to load the
912 firmware via mixartloader utility in alsa-tools package.
917 Module for MPU-401 UART devices.
919 port - port number or -1 (disable)
920 irq - IRQ number or -1 (disable)
921 pnp - PnP detection - 0 = disable, 1 = enable (default)
923 Module supports multiple devices (max 8) and PnP.
928 Module for MOTU MidiTimePiece AV multiport MIDI (on the parallel
931 port - I/O port # for MTPAV (0x378,0x278, default=0x378)
932 irq - IRQ # for MTPAV (7,5, default=7)
933 hwports - number of supported hardware ports, default=8.
935 Module supports only 1 card. This module has no enable option.
940 Module for NeoMagic NM256AV/ZX chips
942 playback_bufsize - max playback frame size in kB (4-128kB)
943 capture_bufsize - max capture frame size in kB (4-128kB)
944 force_ac97 - 0 or 1 (disabled by default)
945 buffer_top - specify buffer top address
946 use_cache - 0 or 1 (disabled by default)
947 vaio_hack - alias buffer_top=0x25a800
948 reset_workaround - enable AC97 RESET workaround for some laptops
950 Module supports autoprobe and multiple chips (max 8).
952 The power-management is supported.
954 Note: on some notebooks the buffer address cannot be detected
955 automatically, or causes hang-up during initialization.
956 In such a case, specify the buffer top address explicity via
959 Sony F250: buffer_top=0x25a800
960 Sony F270: buffer_top=0x272800
961 The driver supports only ac97 codec. It's possible to force
962 to initialize/use ac97 although it's not detected. In such a
963 case, use force_ac97=1 option - but *NO* guarantee whether it
966 Note: The NM256 chip can be linked internally with non-AC97
967 codecs. This driver supports only the AC97 codec, and won't work
968 with machines with other (most likely CS423x or OPL3SAx) chips,
969 even though the device is detected in lspci. In such a case, try
970 other drivers, e.g. snd-cs4232 or snd-opl3sa2. Some has ISA-PnP
971 but some doesn't have ISA PnP. You'll need to specify isapnp=0
972 and proper hardware parameters in the case without ISA PnP.
974 Note: some laptops need a workaround for AC97 RESET. For the
975 known hardware like Dell Latitude LS and Sony PCG-F305, this
976 workaround is enabled automatically. For other laptops with a
977 hard freeze, you can try reset_workaround=1 option.
979 Note: This driver is really crappy. It's a porting from the
980 OSS driver, which is a result of black-magic reverse engineering.
981 The detection of codec will fail if the driver is loaded *after*
982 X-server as described above. You might be able to force to load
983 the module, but it may result in hang-up. Hence, make sure that
984 you load this module *before* X if you encounter this kind of
990 Module for Yamaha OPL3-SA2/SA3 sound cards.
992 port - control port # for OPL3-SA chip (0x370)
993 sb_port - SB port # for OPL3-SA chip (0x220,0x240)
994 wss_port - WSS port # for OPL3-SA chip (0x530,0xe80,0xf40,0x604)
995 midi_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
996 fm_port - FM port # for OPL3-SA chip (0x388), -1 = disable
997 irq - IRQ # for OPL3-SA chip (5,7,9,10)
998 dma1 - first DMA # for Yamaha OPL3-SA chip (0,1,3)
999 dma2 - second DMA # for Yamaha OPL3-SA chip (0,1,3), -1 = disable
1000 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1002 Module supports up to 8 cards and ISA PnP. This module does not support
1003 autoprobe (if ISA PnP is not used) thus all ports must be specified!!!
1005 The power-management is supported.
1007 Module snd-opti92x-ad1848
1008 -------------------------
1010 Module for sound cards based on OPTi 82c92x and Analog Devices AD1848 chips.
1011 Module works with OAK Mozart cards as well.
1013 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1014 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1015 fm_port - port # for OPL3 device (0x388)
1016 irq - IRQ # for WSS chip (5,7,9,10,11)
1017 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1018 dma1 - first DMA # for WSS chip (0,1,3)
1020 This module supports only one card, autoprobe and PnP.
1022 Module snd-opti92x-cs4231
1023 -------------------------
1025 Module for sound cards based on OPTi 82c92x and Crystal CS4231 chips.
1027 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1028 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1029 fm_port - port # for OPL3 device (0x388)
1030 irq - IRQ # for WSS chip (5,7,9,10,11)
1031 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1032 dma1 - first DMA # for WSS chip (0,1,3)
1033 dma2 - second DMA # for WSS chip (0,1,3)
1035 This module supports only one card, autoprobe and PnP.
1040 Module for sound cards based on OPTi 82c93x chips.
1042 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1043 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1044 fm_port - port # for OPL3 device (0x388)
1045 irq - IRQ # for WSS chip (5,7,9,10,11)
1046 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1047 dma1 - first DMA # for WSS chip (0,1,3)
1048 dma2 - second DMA # for WSS chip (0,1,3)
1050 This module supports only one card, autoprobe and PnP.
1052 Module snd-powermac (on ppc only)
1053 ---------------------------------
1055 Module for PowerMac, iMac and iBook on-board soundchips
1057 enable_beep - enable beep using PCM (enabled as default)
1059 Module supports autoprobe a chip.
1061 Note: the driver may have problems regarding endianess.
1063 The power-management is supported.
1065 Module snd-pxa2xx-ac97 (on arm only)
1066 ------------------------------------
1068 Module for AC97 driver for the Intel PXA2xx chip
1070 For ARM architecture only.
1075 Module for RME Digi32, Digi32 Pro and Digi32/8 (Sek'd Prodif32,
1076 Prodif96 and Prodif Gold) sound cards.
1078 Module supports up to 8 cards.
1083 Module for RME Digi96, Digi96/8 and Digi96/8 PRO/PAD/PST sound cards.
1085 Module supports up to 8 cards.
1090 Module for RME Digi9652 (Hammerfall, Hammerfall-Light) sound cards.
1092 precise_ptr - Enable precise pointer (doesn't work reliably).
1095 Module supports up to 8 cards.
1097 Note: snd-page-alloc module does the job which snd-hammerfall-mem
1098 module did formerly. It will allocate the buffers in advance
1099 when any RME9652 cards are found. To make the buffer
1100 allocation sure, load snd-page-alloc module in the early
1101 stage of boot sequence. See "Early Buffer Allocation"
1104 Module snd-sa11xx-uda1341 (on arm only)
1105 ---------------------------------------
1107 Module for Philips UDA1341TS on Compaq iPAQ H3600 sound card.
1109 Module supports only one card.
1110 Module has no enable and index options.
1115 Module for 8-bit SoundBlaster cards: SoundBlaster 1.0,
1119 port - port # for SB DSP chip (0x220,0x240,0x260)
1120 irq - IRQ # for SB DSP chip (5,7,9,10)
1121 dma8 - DMA # for SB DSP chip (1,3)
1123 Module supports up to 8 cards and autoprobe.
1125 Module snd-sb16 and snd-sbawe
1126 -----------------------------
1128 Module for 16-bit SoundBlaster cards: SoundBlaster 16 (PnP),
1129 SoundBlaster AWE 32 (PnP),
1130 SoundBlaster AWE 64 PnP
1132 port - port # for SB DSP 4.x chip (0x220,0x240,0x260)
1133 mpu_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1134 awe_port - base port # for EMU8000 synthesizer (0x620,0x640,0x660)
1135 (snd-sbawe module only)
1136 irq - IRQ # for SB DSP 4.x chip (5,7,9,10)
1137 dma8 - 8-bit DMA # for SB DSP 4.x chip (0,1,3)
1138 dma16 - 16-bit DMA # for SB DSP 4.x chip (5,6,7)
1139 mic_agc - Mic Auto-Gain-Control - 0 = disable, 1 = enable (default)
1140 csp - ASP/CSP chip support - 0 = disable (default), 1 = enable
1141 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1143 Module supports up to 8 cards, autoprobe and ISA PnP.
1145 Note: To use Vibra16X cards in 16-bit half duplex mode, you must
1146 disable 16bit DMA with dma16 = -1 module parameter.
1147 Also, all Sound Blaster 16 type cards can operate in 16-bit
1148 half duplex mode through 8-bit DMA channel by disabling their
1154 Module for Aztech Sound Galaxy sound card.
1156 sbport - Port # for SB16 interface (0x220,0x240)
1157 wssport - Port # for WSS interface (0x530,0xe80,0xf40,0x604)
1158 irq - IRQ # (7,9,10,11)
1161 Module supports up to 8 cards.
1166 Module for ENSONIQ SoundScape PnP cards.
1168 port - Port # (PnP setup)
1169 irq - IRQ # (PnP setup)
1170 mpu_irq - MPU-401 IRQ # (PnP setup)
1171 dma - DMA # (PnP setup)
1173 Module supports up to 8 cards. ISA PnP must be enabled.
1174 You need sscape_ctl tool in alsa-tools package for loading
1177 Module snd-sun-amd7930 (on sparc only)
1178 --------------------------------------
1180 Module for AMD7930 sound chips found on Sparcs.
1182 Module supports up to 8 cards.
1184 Module snd-sun-cs4231 (on sparc only)
1185 -------------------------------------
1187 Module for CS4231 sound chips found on Sparcs.
1189 Module supports up to 8 cards.
1191 Module snd-sun-dbri (on sparc only)
1192 -----------------------------------
1194 Module for DBRI sound chips found on Sparcs.
1196 Module supports up to 8 cards.
1198 Module snd-wavefront
1199 --------------------
1201 Module for Turtle Beach Maui, Tropez and Tropez+ sound cards.
1203 cs4232_pcm_port - Port # for CS4232 PCM interface.
1204 cs4232_pcm_irq - IRQ # for CS4232 PCM interface (5,7,9,11,12,15).
1205 cs4232_mpu_port - Port # for CS4232 MPU-401 interface.
1206 cs4232_mpu_irq - IRQ # for CS4232 MPU-401 interface (9,11,12,15).
1207 use_cs4232_midi - Use CS4232 MPU-401 interface
1208 (inaccessibly located inside your computer)
1209 ics2115_port - Port # for ICS2115
1210 ics2115_irq - IRQ # for ICS2115
1211 fm_port - FM OPL-3 Port #
1212 dma1 - DMA1 # for CS4232 PCM interface.
1213 dma2 - DMA2 # for CS4232 PCM interface.
1214 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1216 Module supports up to 8 cards and ISA PnP.
1218 Module snd-sonicvibes
1219 ---------------------
1221 Module for S3 SonicVibes PCI sound cards.
1222 * PINE Schubert 32 PCI
1224 reverb - Reverb Enable - 1 = enable, 0 = disable (default)
1225 - SoundCard must have onboard SRAM for this.
1226 mge - Mic Gain Enable - 1 = enable, 0 = disable (default)
1228 Module supports up to 8 cards and autoprobe.
1230 Module snd-serial-u16550
1231 ------------------------
1233 Module for UART16550A serial MIDI ports.
1235 port - port # for UART16550A chip
1236 irq - IRQ # for UART16550A chip, -1 = poll mode
1237 speed - speed in bauds (9600,19200,38400,57600,115200)
1239 base - base for divisor in bauds (57600,115200,230400,460800)
1241 outs - number of MIDI ports in a serial port (1-4)
1243 adaptor - Type of adaptor.
1244 0 = Soundcanvas, 1 = MS-124T, 2 = MS-124W S/A,
1245 3 = MS-124W M/B, 4 = Generic
1247 Module supports up to 8 cards. This module does not support autoprobe
1248 thus the main port must be specified!!! Other options are optional.
1253 Module for Trident 4DWave DX/NX sound cards.
1254 * Best Union Miss Melody 4DWave PCI
1256 * Warpspeed ONSpeed 4DWave PCI
1259 * CHIC True Sound 4Dwave
1260 * Shark Predator4D-PCI
1261 * Jaton SonicWave 4D
1263 pcm_channels - max channels (voices) reserved for PCM
1264 wavetable_size - max wavetable size in kB (4-?kb)
1266 Module supports up to 8 cards and autoprobe.
1268 The power-management is supported.
1270 Module snd-usb-audio
1271 --------------------
1273 Module for USB audio and USB MIDI devices.
1275 vid - Vendor ID for the device (optional)
1276 pid - Product ID for the device (optional)
1278 This module supports up to 8 cards, autoprobe and hotplugging.
1280 Module snd-usb-usx2y
1281 --------------------
1283 Module for Tascam USB US-122, US-224 and US-428 devices.
1285 This module supports up to 8 cards, autoprobe and hotplugging.
1287 Note: you need to load the firmware via usx2yloader utility included
1288 in alsa-tools and alsa-firmware packages.
1293 Module for AC'97 motherboards based on VIA 82C686A/686B, 8233,
1294 8233A, 8233C, 8235, 8237 (south) bridge.
1296 mpu_port - 0x300,0x310,0x320,0x330, otherwise obtain BIOS setup
1298 joystick - Enable joystick (default off) [VIA686A/686B only]
1299 ac97_clock - AC'97 codec clock base (default 48000Hz)
1300 dxs_support - support DXS channels,
1301 0 = auto (default), 1 = enable, 2 = disable,
1302 3 = 48k only, 4 = no VRA, 5 = enable any sample
1303 rate and different sample rates on different
1305 [VIA8233/C, 8235, 8237 only]
1306 ac97_quirk - AC'97 workaround for strange hardware
1307 See "AC97 Quirk Option" section below.
1309 Module supports autoprobe and multiple bus-master chips (max 8).
1311 Note: on some SMP motherboards like MSI 694D the interrupts might
1312 not be generated properly. In such a case, please try to
1313 set the SMP (or MPS) version on BIOS to 1.1 instead of
1314 default value 1.4. Then the interrupt number will be
1315 assigned under 15. You might also upgrade your BIOS.
1317 Note: VIA8233/5/7 (not VIA8233A) can support DXS (direct sound)
1318 channels as the first PCM. On these channels, up to 4
1319 streams can be played at the same time, and the controller
1320 can perform sample rate conversion with separate rates for
1322 As default (dxs_support = 0), 48k fixed rate is chosen
1323 except for the known devices since the output is often
1324 noisy except for 48k on some mother boards due to the
1326 Please try once dxs_support=5 and if it works on other
1327 sample rates (e.g. 44.1kHz of mp3 playback), please let us
1328 know the PCI subsystem vendor/device id's (output of
1330 If dxs_support=5 does not work, try dxs_support=4; if it
1331 doesn't work too, try dxs_support=1. (dxs_support=1 is
1332 usually for old motherboards. The correct implemented
1333 board should work with 4 or 5.) If it still doesn't
1334 work and the default setting is ok, dxs_support=3 is the
1335 right choice. If the default setting doesn't work at all,
1336 try dxs_support=2 to disable the DXS channels.
1337 In any cases, please let us know the result and the
1338 subsystem vendor/device ids. See "Links and Addresses"
1341 Note: for the MPU401 on VIA823x, use snd-mpu401 driver
1342 additionally. The mpu_port option is for VIA686 chips only.
1344 Module snd-via82xx-modem
1345 ------------------------
1347 Module for VIA82xx AC97 modem
1349 ac97_clock - AC'97 codec clock base (default 48000Hz)
1351 Module supports up to 8 cards.
1353 Note: The default index value of this module is -2, i.e. the first
1359 Module for virtual rawmidi devices.
1360 This module creates virtual rawmidi devices which communicate
1361 to the corresponding ALSA sequencer ports.
1363 midi_devs - MIDI devices # (1-8, default=4)
1365 Module supports up to 8 cards.
1370 Module for Digigram VX-Pocket VX222, V222 v2 and Mic cards.
1372 mic - Enable Microphone on V222 Mic (NYI)
1373 ibl - Capture IBL size. (default = 0, minimum size)
1375 Module supports up to 8 cards.
1377 When the driver is compiled as a module and the hotplug firmware
1378 is supported, the firmware data is loaded via hotplug automatically.
1379 Install the necessary firmware files in alsa-firmware package.
1380 When no hotplug fw loader is available, you need to load the
1381 firmware via vxloader utility in alsa-tools package. To invoke
1382 vxloader automatically, add the following to /etc/modprobe.conf
1384 install snd-vx222 /sbin/modprobe --first-time -i snd-vx222 && /usr/bin/vxloader
1386 (for 2.2/2.4 kernels, add "post-install /usr/bin/vxloader" to
1387 /etc/modules.conf, instead.)
1388 IBL size defines the interrupts period for PCM. The smaller size
1389 gives smaller latency but leads to more CPU consumption, too.
1390 The size is usually aligned to 126. As default (=0), the smallest
1391 size is chosen. The possible IBL values can be found in
1392 /proc/asound/cardX/vx-status proc file.
1397 Module for Digigram VX-Pocket VX2 and 440 PCMCIA cards.
1399 ibl - Capture IBL size. (default = 0, minimum size)
1401 Module supports up to 8 cards. The module is compiled only when
1402 PCMCIA is supported on kernel.
1404 With the older 2.6.x kernel, to activate the driver via the card
1405 manager, you'll need to set up /etc/pcmcia/vxpocket.conf. See the
1406 sound/pcmcia/vx/vxpocket.c. 2.6.13 or later kernel requires no
1407 longer require a config file.
1409 When the driver is compiled as a module and the hotplug firmware
1410 is supported, the firmware data is loaded via hotplug automatically.
1411 Install the necessary firmware files in alsa-firmware package.
1412 When no hotplug fw loader is available, you need to load the
1413 firmware via vxloader utility in alsa-tools package.
1415 About capture IBL, see the description of snd-vx222 module.
1417 Note: the driver is build only when CONFIG_ISA is set.
1419 Note2: snd-vxp440 driver is merged to snd-vxpocket driver since
1425 Module for Yamaha PCI chips (YMF72x, YMF74x & YMF75x).
1427 mpu_port - 0x300,0x330,0x332,0x334, 0 (disable) by default,
1428 1 (auto-detect for YMF744/754 only)
1429 fm_port - 0x388,0x398,0x3a0,0x3a8, 0 (disable) by default
1430 1 (auto-detect for YMF744/754 only)
1431 joystick_port - 0x201,0x202,0x204,0x205, 0 (disable) by default,
1433 rear_switch - enable shared rear/line-in switch (bool)
1435 Module supports autoprobe and multiple chips (max 8).
1437 The power-management is supported.
1439 Module snd-pdaudiocf
1440 --------------------
1442 Module for Sound Core PDAudioCF sound card.
1444 Note: the driver is build only when CONFIG_ISA is set.
1450 The ac97_quirk option is used to enable/override the workaround for
1451 specific devices on drivers for on-board AC'97 controllers like
1452 snd-intel8x0. Some hardware have swapped output pins between Master
1453 and Headphone, or Surround (thanks to confusion of AC'97
1454 specifications from version to version :-)
1456 The driver provides the auto-detection of known problematic devices,
1457 but some might be unknown or wrongly detected. In such a case, pass
1458 the proper value with this option.
1460 The following strings are accepted:
1461 - default Don't override the default setting
1462 - disable Disable the quirk
1463 - hp_only Bind Master and Headphone controls as a single control
1464 - swap_hp Swap headphone and master controls
1465 - swap_surround Swap master and surround controls
1466 - ad_sharing For AD1985, turn on OMS bit and use headphone
1467 - alc_jack For ALC65x, turn on the jack sense mode
1468 - inv_eapd Inverted EAPD implementation
1469 - mute_led Bind EAPD bit for turning on/off mute LED
1471 For backward compatibility, the corresponding integer value -1, 0,
1472 ... are accepted, too.
1474 For example, if "Master" volume control has no effect on your device
1475 but only "Headphone" does, pass ac97_quirk=hp_only module option.
1478 Configuring Non-ISAPNP Cards
1479 ============================
1481 When the kernel is configured with ISA-PnP support, the modules
1482 supporting the isapnp cards will have module options "isapnp".
1483 If this option is set, *only* the ISA-PnP devices will be probed.
1484 For probing the non ISA-PnP cards, you have to pass "isapnp=0" option
1485 together with the proper i/o and irq configuration.
1487 When the kernel is configured without ISA-PnP support, isapnp option
1488 will be not built in.
1491 Module Autoloading Support
1492 ==========================
1494 The ALSA drivers can be loaded automatically on demand by defining
1495 module aliases. The string 'snd-card-%1' is requested for ALSA native
1496 devices where %i is sound card number from zero to seven.
1498 To auto-load an ALSA driver for OSS services, define the string
1499 'sound-slot-%i' where %i means the slot number for OSS, which
1500 corresponds to the card index of ALSA. Usually, define this
1501 as the same card module.
1503 An example configuration for a single emu10k1 card is like below:
1504 ----- /etc/modprobe.conf
1505 alias snd-card-0 snd-emu10k1
1506 alias sound-slot-0 snd-emu10k1
1507 ----- /etc/modprobe.conf
1509 The available number of auto-loaded sound cards depends on the module
1510 option "cards_limit" of snd module. As default it's set to 1.
1511 To enable the auto-loading of multiple cards, specify the number of
1512 sound cards in that option.
1514 When multiple cards are available, it'd better to specify the index
1515 number for each card via module option, too, so that the order of
1516 cards is kept consistent.
1518 An example configuration for two sound cards is like below:
1520 ----- /etc/modprobe.conf
1522 options snd cards_limit=2
1523 alias snd-card-0 snd-interwave
1524 alias snd-card-1 snd-ens1371
1525 options snd-interwave index=0
1526 options snd-ens1371 index=1
1528 alias sound-slot-0 snd-interwave
1529 alias sound-slot-1 snd-ens1371
1530 ----- /etc/moprobe.conf
1532 In this example, the interwave card is always loaded as the first card
1533 (index 0) and ens1371 as the second (index 1).
1536 ALSA PCM devices to OSS devices mapping
1537 =======================================
1539 /dev/snd/pcmC0D0[c|p] -> /dev/audio0 (/dev/audio) -> minor 4
1540 /dev/snd/pcmC0D0[c|p] -> /dev/dsp0 (/dev/dsp) -> minor 3
1541 /dev/snd/pcmC0D1[c|p] -> /dev/adsp0 (/dev/adsp) -> minor 12
1542 /dev/snd/pcmC1D0[c|p] -> /dev/audio1 -> minor 4+16 = 20
1543 /dev/snd/pcmC1D0[c|p] -> /dev/dsp1 -> minor 3+16 = 19
1544 /dev/snd/pcmC1D1[c|p] -> /dev/adsp1 -> minor 12+16 = 28
1545 /dev/snd/pcmC2D0[c|p] -> /dev/audio2 -> minor 4+32 = 36
1546 /dev/snd/pcmC2D0[c|p] -> /dev/dsp2 -> minor 3+32 = 39
1547 /dev/snd/pcmC2D1[c|p] -> /dev/adsp2 -> minor 12+32 = 44
1549 The first number from /dev/snd/pcmC{X}D{Y}[c|p] expression means
1550 sound card number and second means device number. The ALSA devices
1551 have either 'c' or 'p' suffix indicating the direction, capture and
1552 playback, respectively.
1554 Please note that the device mapping above may be varied via the module
1555 options of snd-pcm-oss module.
1561 The ALSA driver fully supports the devfs extension.
1562 You should add lines below to your devfsd.conf file:
1564 LOOKUP snd MODLOAD ACTION snd
1565 REGISTER ^sound/.* PERMISSIONS root.audio 660
1566 REGISTER ^snd/.* PERMISSIONS root.audio 660
1568 Warning: These lines assume that you have the audio group in your system.
1569 Otherwise replace audio word with another group name (root for
1573 Proc interfaces (/proc/asound)
1574 ==============================
1576 /proc/asound/card#/pcm#[cp]/oss
1577 -------------------------------
1578 String "erase" - erase all additional informations about OSS applications
1579 String "<app_name> <fragments> <fragment_size> [<options>]"
1581 <app_name> - name of application with (higher priority) or without path
1582 <fragments> - number of fragments or zero if auto
1583 <fragment_size> - size of fragment in bytes or zero if auto
1584 <options> - optional parameters
1585 - disable the application tries to open a pcm device for
1586 this channel but does not want to use it.
1587 (Cause a bug or mmap needs)
1588 It's good for Quake etc...
1589 - direct don't use plugins
1590 - block force block mode (rvplayer)
1591 - non-block force non-block mode
1592 - whole-frag write only whole fragments (optimization affecting
1594 - no-silence do not fill silence ahead to avoid clicks
1595 - buggy-ptr Returns the whitespace blocks in GETOPTR ioctl
1596 instead of filled blocks
1598 Example: echo "x11amp 128 16384" > /proc/asound/card0/pcm0p/oss
1599 echo "squake 0 0 disable" > /proc/asound/card0/pcm0c/oss
1600 echo "rvplayer 0 0 block" > /proc/asound/card0/pcm0p/oss
1603 Early Buffer Allocation
1604 =======================
1606 Some drivers (e.g. hdsp) require the large contiguous buffers, and
1607 sometimes it's too late to find such spaces when the driver module is
1608 actually loaded due to memory fragmentation. You can pre-allocate the
1609 PCM buffers by loading snd-page-alloc module and write commands to its
1610 proc file in prior, for example, in the early boot stage like
1611 /etc/init.d/*.local scripts.
1613 Reading the proc file /proc/drivers/snd-page-alloc shows the current
1614 usage of page allocation. In writing, you can send the following
1615 commands to the snd-page-alloc driver:
1617 - add VENDOR DEVICE MASK SIZE BUFFERS
1619 VENDOR and DEVICE are PCI vendor and device IDs. They take
1620 integer numbers (0x prefix is needed for the hex).
1621 MASK is the PCI DMA mask. Pass 0 if not restricted.
1622 SIZE is the size of each buffer to allocate. You can pass
1623 k and m suffix for KB and MB. The max number is 16MB.
1624 BUFFERS is the number of buffers to allocate. It must be greater
1625 than 0. The max number is 4.
1629 This will erase the all pre-allocated buffers which are not in
1636 ALSA project homepage
1637 http://www.alsa-project.org
1639 ALSA Bug Tracking System
1640 https://bugtrack.alsa-project.org/bugs/
1643 mailto:alsa-devel@lists.sourceforge.net
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