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
668 fujitsu Fujitsu S7020
671 minimal 3-jack in back
672 min_fp 3-jack in back, 2-jack in front
673 full 6-jack in back, 2-jack in front
674 full_dig 6-jack in back, 2-jack in front, SPDIF I/O
675 allout 5-jack in back, 2-jack in front, SPDIF out
676 auto auto-config reading BIOS (default)
678 If the default configuration doesn't work and one of the above
679 matches with your device, report it together with the PCI
680 subsystem ID (output of "lspci -nv") to ALSA BTS or alsa-devel
681 ML (see the section "Links and Addresses").
683 Note 2: If you get click noises on output, try the module option
684 position_fix=1 or 2. position_fix=1 will use the SD_LPIB
685 register value without FIFO size correction as the current
686 DMA pointer. position_fix=2 will make the driver to use
687 the position buffer instead of reading SD_LPIB register.
688 (Usually SD_LPLIB register is more accurate than the
694 Module for RME Hammerfall DSP audio interface(s)
696 Module supports up to 8 cards.
698 Note: The firmware data can be automatically loaded via hotplug
699 when CONFIG_FW_LOADER is set. Otherwise, you need to load
700 the firmware via hdsploader utility included in alsa-tools
702 The firmware data is found in alsa-firmware package.
704 Note: snd-page-alloc module does the job which snd-hammerfall-mem
705 module did formerly. It will allocate the buffers in advance
706 when any HDSP cards are found. To make the buffer
707 allocation sure, load snd-page-alloc module in the early
708 stage of boot sequence. See "Early Buffer Allocation"
714 Module for RME HDSP MADI board.
716 precise_ptr - Enable precise pointer, or disable.
717 line_outs_monitor - Send playback streams to analog outs by default.
718 enable_monitor - Enable Analog Out on Channel 63/64 by default.
720 See hdspm.txt for details.
725 Module for Envy24 (ICE1712) based PCI sound cards.
726 * MidiMan M Audio Delta 1010
727 * MidiMan M Audio Delta 1010LT
728 * MidiMan M Audio Delta DiO 2496
729 * MidiMan M Audio Delta 66
730 * MidiMan M Audio Delta 44
731 * MidiMan M Audio Delta 410
732 * MidiMan M Audio Audiophile 2496
738 * Hoontech SoundTrack DSP 24
739 * Hoontech SoundTrack DSP 24 Value
740 * Hoontech SoundTrack DSP 24 Media 7.1
741 * Event Electronics, EZ8
743 * Lionstracs, Mediastaton
745 model - Use the given board model, one of the following:
746 delta1010, dio2496, delta66, delta44, audiophile, delta410,
747 delta1010lt, vx442, ewx2496, ews88mt, ews88mt_new, ews88d,
748 dmx6fire, dsp24, dsp24_value, dsp24_71, ez8,
749 phase88, mediastation
750 omni - Omni I/O support for MidiMan M-Audio Delta44/66
751 cs8427_timeout - reset timeout for the CS8427 chip (S/PDIF transciever)
752 in msec resolution, default value is 500 (0.5 sec)
754 Module supports up to 8 cards and autoprobe. Note: The consumer part
755 is not used with all Envy24 based cards (for example in the MidiMan Delta
758 Note: The supported board is detected by reading EEPROM or PCI
759 SSID (if EEPROM isn't available). You can override the
760 model by passing "model" module option in case that the
761 driver isn't configured properly or you want to try another
767 Module for Envy24HT (VT/ICE1724), Envy24PT (VT1720) based PCI sound cards.
768 * MidiMan M Audio Revolution 7.1
770 * TerraTec Aureon 5.1 Sky
771 * TerraTec Aureon 7.1 Space
772 * TerraTec Aureon 7.1 Universe
775 * AudioTrak Prodigy 7.1
776 * AudioTrak Prodigy 192
778 * Albatron K8X800 Pro II
785 model - Use the given board model, one of the following:
786 revo71, amp2000, prodigy71, prodigy192, aureon51,
787 aureon71, universe, k8x800, phase22, phase28, ms300,
790 Module supports up to 8 cards and autoprobe.
792 Note: The supported board is detected by reading EEPROM or PCI
793 SSID (if EEPROM isn't available). You can override the
794 model by passing "model" module option in case that the
795 driver isn't configured properly or you want to try another
801 Module for AC'97 motherboards from Intel and compatibles.
802 * Intel i810/810E, i815, i820, i830, i84x, MX440
804 * NVidia NForce, NForce2
805 * AMD AMD768, AMD8111
808 ac97_clock - AC'97 codec clock base (0 = auto-detect)
809 ac97_quirk - AC'97 workaround for strange hardware
810 See "AC97 Quirk Option" section below.
811 buggy_irq - Enable workaround for buggy interrupts on some
812 motherboards (default yes on nForce chips,
814 buggy_semaphore - Enable workaround for hardwares with buggy
815 semaphores (e.g. on some ASUS laptops)
818 Module supports autoprobe and multiple bus-master chips (max 8).
820 Note: the latest driver supports auto-detection of chip clock.
821 if you still encounter too fast playback, specify the clock
822 explicitly via the module option "ac97_clock=41194".
824 Joystick/MIDI ports are not supported by this driver. If your
825 motherboard has these devices, use the ns558 or snd-mpu401
826 modules, respectively.
828 The power-management is supported.
833 Module for Intel ICH (i8x0) chipset MC97 modems.
835 ac97_clock - AC'97 codec clock base (0 = auto-detect)
837 This module supports up to 8 cards and autoprobe.
839 Note: The default index value of this module is -2, i.e. the first
845 Module for Gravis UltraSound PnP, Dynasonic 3-D/Pro, STB Sound Rage 32
846 and other sound cards based on AMD InterWave (tm) chip.
848 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
849 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
850 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
851 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
852 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
853 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
854 pcm_voices - reserved PCM voices for the synthesizer (default 2)
855 effect - 1 = InterWave effects enable (default 0);
858 Module supports up to 8 cards, autoprobe and ISA PnP.
860 Module snd-interwave-stb
861 ------------------------
863 Module for UltraSound 32-Pro (sound card from STB used by Compaq)
864 and other sound cards based on AMD InterWave (tm) chip with TEA6330T
865 circuit for extended control of bass, treble and master volume.
867 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
868 port_tc - tone control (i2c bus) port # for TEA6330T chip (0x350,0x360,0x370,0x380)
869 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
870 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
871 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
872 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
873 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
874 pcm_voices - reserved PCM voices for the synthesizer (default 2)
875 effect - 1 = InterWave effects enable (default 0);
878 Module supports up to 8 cards, autoprobe and ISA PnP.
883 Module for Korg 1212 IO PCI card
885 Module supports up to 8 cards.
890 Module for Allegro/Maestro3 chips
892 external_amp - enable external amp (enabled by default)
893 amp_gpio - GPIO pin number for external amp (0-15) or
894 -1 for default pin (8 for allegro, 1 for
897 Module supports autoprobe and multiple chips (max 8).
899 Note: the binding of amplifier is dependent on hardware.
900 If there is no sound even though all channels are unmuted, try to
901 specify other gpio connection via amp_gpio option.
902 For example, a Panasonic notebook might need "amp_gpio=0x0d"
905 The power-management is supported.
910 Module for Digigram miXart8 sound cards.
912 Module supports multiple cards.
913 Note: One miXart8 board will be represented as 4 alsa cards.
914 See MIXART.txt for details.
916 When the driver is compiled as a module and the hotplug firmware
917 is supported, the firmware data is loaded via hotplug automatically.
918 Install the necessary firmware files in alsa-firmware package.
919 When no hotplug fw loader is available, you need to load the
920 firmware via mixartloader utility in alsa-tools package.
925 Module for MPU-401 UART devices.
927 port - port number or -1 (disable)
928 irq - IRQ number or -1 (disable)
929 pnp - PnP detection - 0 = disable, 1 = enable (default)
931 Module supports multiple devices (max 8) and PnP.
936 Module for MOTU MidiTimePiece AV multiport MIDI (on the parallel
939 port - I/O port # for MTPAV (0x378,0x278, default=0x378)
940 irq - IRQ # for MTPAV (7,5, default=7)
941 hwports - number of supported hardware ports, default=8.
943 Module supports only 1 card. This module has no enable option.
948 Module for NeoMagic NM256AV/ZX chips
950 playback_bufsize - max playback frame size in kB (4-128kB)
951 capture_bufsize - max capture frame size in kB (4-128kB)
952 force_ac97 - 0 or 1 (disabled by default)
953 buffer_top - specify buffer top address
954 use_cache - 0 or 1 (disabled by default)
955 vaio_hack - alias buffer_top=0x25a800
956 reset_workaround - enable AC97 RESET workaround for some laptops
958 Module supports autoprobe and multiple chips (max 8).
960 The power-management is supported.
962 Note: on some notebooks the buffer address cannot be detected
963 automatically, or causes hang-up during initialization.
964 In such a case, specify the buffer top address explicity via
967 Sony F250: buffer_top=0x25a800
968 Sony F270: buffer_top=0x272800
969 The driver supports only ac97 codec. It's possible to force
970 to initialize/use ac97 although it's not detected. In such a
971 case, use force_ac97=1 option - but *NO* guarantee whether it
974 Note: The NM256 chip can be linked internally with non-AC97
975 codecs. This driver supports only the AC97 codec, and won't work
976 with machines with other (most likely CS423x or OPL3SAx) chips,
977 even though the device is detected in lspci. In such a case, try
978 other drivers, e.g. snd-cs4232 or snd-opl3sa2. Some has ISA-PnP
979 but some doesn't have ISA PnP. You'll need to specify isapnp=0
980 and proper hardware parameters in the case without ISA PnP.
982 Note: some laptops need a workaround for AC97 RESET. For the
983 known hardware like Dell Latitude LS and Sony PCG-F305, this
984 workaround is enabled automatically. For other laptops with a
985 hard freeze, you can try reset_workaround=1 option.
987 Note: This driver is really crappy. It's a porting from the
988 OSS driver, which is a result of black-magic reverse engineering.
989 The detection of codec will fail if the driver is loaded *after*
990 X-server as described above. You might be able to force to load
991 the module, but it may result in hang-up. Hence, make sure that
992 you load this module *before* X if you encounter this kind of
998 Module for Yamaha OPL3-SA2/SA3 sound cards.
1000 port - control port # for OPL3-SA chip (0x370)
1001 sb_port - SB port # for OPL3-SA chip (0x220,0x240)
1002 wss_port - WSS port # for OPL3-SA chip (0x530,0xe80,0xf40,0x604)
1003 midi_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1004 fm_port - FM port # for OPL3-SA chip (0x388), -1 = disable
1005 irq - IRQ # for OPL3-SA chip (5,7,9,10)
1006 dma1 - first DMA # for Yamaha OPL3-SA chip (0,1,3)
1007 dma2 - second DMA # for Yamaha OPL3-SA chip (0,1,3), -1 = disable
1008 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1010 Module supports up to 8 cards and ISA PnP. This module does not support
1011 autoprobe (if ISA PnP is not used) thus all ports must be specified!!!
1013 The power-management is supported.
1015 Module snd-opti92x-ad1848
1016 -------------------------
1018 Module for sound cards based on OPTi 82c92x and Analog Devices AD1848 chips.
1019 Module works with OAK Mozart cards as well.
1021 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1022 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1023 fm_port - port # for OPL3 device (0x388)
1024 irq - IRQ # for WSS chip (5,7,9,10,11)
1025 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1026 dma1 - first DMA # for WSS chip (0,1,3)
1028 This module supports only one card, autoprobe and PnP.
1030 Module snd-opti92x-cs4231
1031 -------------------------
1033 Module for sound cards based on OPTi 82c92x and Crystal CS4231 chips.
1035 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1036 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1037 fm_port - port # for OPL3 device (0x388)
1038 irq - IRQ # for WSS chip (5,7,9,10,11)
1039 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1040 dma1 - first DMA # for WSS chip (0,1,3)
1041 dma2 - second DMA # for WSS chip (0,1,3)
1043 This module supports only one card, autoprobe and PnP.
1048 Module for sound cards based on OPTi 82c93x chips.
1050 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1051 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1052 fm_port - port # for OPL3 device (0x388)
1053 irq - IRQ # for WSS chip (5,7,9,10,11)
1054 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1055 dma1 - first DMA # for WSS chip (0,1,3)
1056 dma2 - second DMA # for WSS chip (0,1,3)
1058 This module supports only one card, autoprobe and PnP.
1060 Module snd-powermac (on ppc only)
1061 ---------------------------------
1063 Module for PowerMac, iMac and iBook on-board soundchips
1065 enable_beep - enable beep using PCM (enabled as default)
1067 Module supports autoprobe a chip.
1069 Note: the driver may have problems regarding endianess.
1071 The power-management is supported.
1073 Module snd-pxa2xx-ac97 (on arm only)
1074 ------------------------------------
1076 Module for AC97 driver for the Intel PXA2xx chip
1078 For ARM architecture only.
1083 Module for RME Digi32, Digi32 Pro and Digi32/8 (Sek'd Prodif32,
1084 Prodif96 and Prodif Gold) sound cards.
1086 Module supports up to 8 cards.
1091 Module for RME Digi96, Digi96/8 and Digi96/8 PRO/PAD/PST sound cards.
1093 Module supports up to 8 cards.
1098 Module for RME Digi9652 (Hammerfall, Hammerfall-Light) sound cards.
1100 precise_ptr - Enable precise pointer (doesn't work reliably).
1103 Module supports up to 8 cards.
1105 Note: snd-page-alloc module does the job which snd-hammerfall-mem
1106 module did formerly. It will allocate the buffers in advance
1107 when any RME9652 cards are found. To make the buffer
1108 allocation sure, load snd-page-alloc module in the early
1109 stage of boot sequence. See "Early Buffer Allocation"
1112 Module snd-sa11xx-uda1341 (on arm only)
1113 ---------------------------------------
1115 Module for Philips UDA1341TS on Compaq iPAQ H3600 sound card.
1117 Module supports only one card.
1118 Module has no enable and index options.
1123 Module for 8-bit SoundBlaster cards: SoundBlaster 1.0,
1127 port - port # for SB DSP chip (0x220,0x240,0x260)
1128 irq - IRQ # for SB DSP chip (5,7,9,10)
1129 dma8 - DMA # for SB DSP chip (1,3)
1131 Module supports up to 8 cards and autoprobe.
1133 Module snd-sb16 and snd-sbawe
1134 -----------------------------
1136 Module for 16-bit SoundBlaster cards: SoundBlaster 16 (PnP),
1137 SoundBlaster AWE 32 (PnP),
1138 SoundBlaster AWE 64 PnP
1140 port - port # for SB DSP 4.x chip (0x220,0x240,0x260)
1141 mpu_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1142 awe_port - base port # for EMU8000 synthesizer (0x620,0x640,0x660)
1143 (snd-sbawe module only)
1144 irq - IRQ # for SB DSP 4.x chip (5,7,9,10)
1145 dma8 - 8-bit DMA # for SB DSP 4.x chip (0,1,3)
1146 dma16 - 16-bit DMA # for SB DSP 4.x chip (5,6,7)
1147 mic_agc - Mic Auto-Gain-Control - 0 = disable, 1 = enable (default)
1148 csp - ASP/CSP chip support - 0 = disable (default), 1 = enable
1149 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1151 Module supports up to 8 cards, autoprobe and ISA PnP.
1153 Note: To use Vibra16X cards in 16-bit half duplex mode, you must
1154 disable 16bit DMA with dma16 = -1 module parameter.
1155 Also, all Sound Blaster 16 type cards can operate in 16-bit
1156 half duplex mode through 8-bit DMA channel by disabling their
1162 Module for Aztech Sound Galaxy sound card.
1164 sbport - Port # for SB16 interface (0x220,0x240)
1165 wssport - Port # for WSS interface (0x530,0xe80,0xf40,0x604)
1166 irq - IRQ # (7,9,10,11)
1169 Module supports up to 8 cards.
1174 Module for ENSONIQ SoundScape PnP cards.
1176 port - Port # (PnP setup)
1177 irq - IRQ # (PnP setup)
1178 mpu_irq - MPU-401 IRQ # (PnP setup)
1179 dma - DMA # (PnP setup)
1181 Module supports up to 8 cards. ISA PnP must be enabled.
1182 You need sscape_ctl tool in alsa-tools package for loading
1185 Module snd-sun-amd7930 (on sparc only)
1186 --------------------------------------
1188 Module for AMD7930 sound chips found on Sparcs.
1190 Module supports up to 8 cards.
1192 Module snd-sun-cs4231 (on sparc only)
1193 -------------------------------------
1195 Module for CS4231 sound chips found on Sparcs.
1197 Module supports up to 8 cards.
1199 Module snd-sun-dbri (on sparc only)
1200 -----------------------------------
1202 Module for DBRI sound chips found on Sparcs.
1204 Module supports up to 8 cards.
1206 Module snd-wavefront
1207 --------------------
1209 Module for Turtle Beach Maui, Tropez and Tropez+ sound cards.
1211 cs4232_pcm_port - Port # for CS4232 PCM interface.
1212 cs4232_pcm_irq - IRQ # for CS4232 PCM interface (5,7,9,11,12,15).
1213 cs4232_mpu_port - Port # for CS4232 MPU-401 interface.
1214 cs4232_mpu_irq - IRQ # for CS4232 MPU-401 interface (9,11,12,15).
1215 use_cs4232_midi - Use CS4232 MPU-401 interface
1216 (inaccessibly located inside your computer)
1217 ics2115_port - Port # for ICS2115
1218 ics2115_irq - IRQ # for ICS2115
1219 fm_port - FM OPL-3 Port #
1220 dma1 - DMA1 # for CS4232 PCM interface.
1221 dma2 - DMA2 # for CS4232 PCM interface.
1222 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1224 Module supports up to 8 cards and ISA PnP.
1226 Module snd-sonicvibes
1227 ---------------------
1229 Module for S3 SonicVibes PCI sound cards.
1230 * PINE Schubert 32 PCI
1232 reverb - Reverb Enable - 1 = enable, 0 = disable (default)
1233 - SoundCard must have onboard SRAM for this.
1234 mge - Mic Gain Enable - 1 = enable, 0 = disable (default)
1236 Module supports up to 8 cards and autoprobe.
1238 Module snd-serial-u16550
1239 ------------------------
1241 Module for UART16550A serial MIDI ports.
1243 port - port # for UART16550A chip
1244 irq - IRQ # for UART16550A chip, -1 = poll mode
1245 speed - speed in bauds (9600,19200,38400,57600,115200)
1247 base - base for divisor in bauds (57600,115200,230400,460800)
1249 outs - number of MIDI ports in a serial port (1-4)
1251 adaptor - Type of adaptor.
1252 0 = Soundcanvas, 1 = MS-124T, 2 = MS-124W S/A,
1253 3 = MS-124W M/B, 4 = Generic
1255 Module supports up to 8 cards. This module does not support autoprobe
1256 thus the main port must be specified!!! Other options are optional.
1261 Module for Trident 4DWave DX/NX sound cards.
1262 * Best Union Miss Melody 4DWave PCI
1264 * Warpspeed ONSpeed 4DWave PCI
1267 * CHIC True Sound 4Dwave
1268 * Shark Predator4D-PCI
1269 * Jaton SonicWave 4D
1271 pcm_channels - max channels (voices) reserved for PCM
1272 wavetable_size - max wavetable size in kB (4-?kb)
1274 Module supports up to 8 cards and autoprobe.
1276 The power-management is supported.
1278 Module snd-usb-audio
1279 --------------------
1281 Module for USB audio and USB MIDI devices.
1283 vid - Vendor ID for the device (optional)
1284 pid - Product ID for the device (optional)
1286 This module supports up to 8 cards, autoprobe and hotplugging.
1288 Module snd-usb-usx2y
1289 --------------------
1291 Module for Tascam USB US-122, US-224 and US-428 devices.
1293 This module supports up to 8 cards, autoprobe and hotplugging.
1295 Note: you need to load the firmware via usx2yloader utility included
1296 in alsa-tools and alsa-firmware packages.
1301 Module for AC'97 motherboards based on VIA 82C686A/686B, 8233,
1302 8233A, 8233C, 8235, 8237 (south) bridge.
1304 mpu_port - 0x300,0x310,0x320,0x330, otherwise obtain BIOS setup
1306 joystick - Enable joystick (default off) [VIA686A/686B only]
1307 ac97_clock - AC'97 codec clock base (default 48000Hz)
1308 dxs_support - support DXS channels,
1309 0 = auto (default), 1 = enable, 2 = disable,
1310 3 = 48k only, 4 = no VRA, 5 = enable any sample
1311 rate and different sample rates on different
1313 [VIA8233/C, 8235, 8237 only]
1314 ac97_quirk - AC'97 workaround for strange hardware
1315 See "AC97 Quirk Option" section below.
1317 Module supports autoprobe and multiple bus-master chips (max 8).
1319 Note: on some SMP motherboards like MSI 694D the interrupts might
1320 not be generated properly. In such a case, please try to
1321 set the SMP (or MPS) version on BIOS to 1.1 instead of
1322 default value 1.4. Then the interrupt number will be
1323 assigned under 15. You might also upgrade your BIOS.
1325 Note: VIA8233/5/7 (not VIA8233A) can support DXS (direct sound)
1326 channels as the first PCM. On these channels, up to 4
1327 streams can be played at the same time, and the controller
1328 can perform sample rate conversion with separate rates for
1330 As default (dxs_support = 0), 48k fixed rate is chosen
1331 except for the known devices since the output is often
1332 noisy except for 48k on some mother boards due to the
1334 Please try once dxs_support=5 and if it works on other
1335 sample rates (e.g. 44.1kHz of mp3 playback), please let us
1336 know the PCI subsystem vendor/device id's (output of
1338 If dxs_support=5 does not work, try dxs_support=4; if it
1339 doesn't work too, try dxs_support=1. (dxs_support=1 is
1340 usually for old motherboards. The correct implemented
1341 board should work with 4 or 5.) If it still doesn't
1342 work and the default setting is ok, dxs_support=3 is the
1343 right choice. If the default setting doesn't work at all,
1344 try dxs_support=2 to disable the DXS channels.
1345 In any cases, please let us know the result and the
1346 subsystem vendor/device ids. See "Links and Addresses"
1349 Note: for the MPU401 on VIA823x, use snd-mpu401 driver
1350 additionally. The mpu_port option is for VIA686 chips only.
1352 Module snd-via82xx-modem
1353 ------------------------
1355 Module for VIA82xx AC97 modem
1357 ac97_clock - AC'97 codec clock base (default 48000Hz)
1359 Module supports up to 8 cards.
1361 Note: The default index value of this module is -2, i.e. the first
1367 Module for virtual rawmidi devices.
1368 This module creates virtual rawmidi devices which communicate
1369 to the corresponding ALSA sequencer ports.
1371 midi_devs - MIDI devices # (1-8, default=4)
1373 Module supports up to 8 cards.
1378 Module for Digigram VX-Pocket VX222, V222 v2 and Mic cards.
1380 mic - Enable Microphone on V222 Mic (NYI)
1381 ibl - Capture IBL size. (default = 0, minimum size)
1383 Module supports up to 8 cards.
1385 When the driver is compiled as a module and the hotplug firmware
1386 is supported, the firmware data is loaded via hotplug automatically.
1387 Install the necessary firmware files in alsa-firmware package.
1388 When no hotplug fw loader is available, you need to load the
1389 firmware via vxloader utility in alsa-tools package. To invoke
1390 vxloader automatically, add the following to /etc/modprobe.conf
1392 install snd-vx222 /sbin/modprobe --first-time -i snd-vx222 && /usr/bin/vxloader
1394 (for 2.2/2.4 kernels, add "post-install /usr/bin/vxloader" to
1395 /etc/modules.conf, instead.)
1396 IBL size defines the interrupts period for PCM. The smaller size
1397 gives smaller latency but leads to more CPU consumption, too.
1398 The size is usually aligned to 126. As default (=0), the smallest
1399 size is chosen. The possible IBL values can be found in
1400 /proc/asound/cardX/vx-status proc file.
1405 Module for Digigram VX-Pocket VX2 and 440 PCMCIA cards.
1407 ibl - Capture IBL size. (default = 0, minimum size)
1409 Module supports up to 8 cards. The module is compiled only when
1410 PCMCIA is supported on kernel.
1412 With the older 2.6.x kernel, to activate the driver via the card
1413 manager, you'll need to set up /etc/pcmcia/vxpocket.conf. See the
1414 sound/pcmcia/vx/vxpocket.c. 2.6.13 or later kernel requires no
1415 longer require a config file.
1417 When the driver is compiled as a module and the hotplug firmware
1418 is supported, the firmware data is loaded via hotplug automatically.
1419 Install the necessary firmware files in alsa-firmware package.
1420 When no hotplug fw loader is available, you need to load the
1421 firmware via vxloader utility in alsa-tools package.
1423 About capture IBL, see the description of snd-vx222 module.
1425 Note: the driver is build only when CONFIG_ISA is set.
1427 Note2: snd-vxp440 driver is merged to snd-vxpocket driver since
1433 Module for Yamaha PCI chips (YMF72x, YMF74x & YMF75x).
1435 mpu_port - 0x300,0x330,0x332,0x334, 0 (disable) by default,
1436 1 (auto-detect for YMF744/754 only)
1437 fm_port - 0x388,0x398,0x3a0,0x3a8, 0 (disable) by default
1438 1 (auto-detect for YMF744/754 only)
1439 joystick_port - 0x201,0x202,0x204,0x205, 0 (disable) by default,
1441 rear_switch - enable shared rear/line-in switch (bool)
1443 Module supports autoprobe and multiple chips (max 8).
1445 The power-management is supported.
1447 Module snd-pdaudiocf
1448 --------------------
1450 Module for Sound Core PDAudioCF sound card.
1452 Note: the driver is build only when CONFIG_ISA is set.
1458 The ac97_quirk option is used to enable/override the workaround for
1459 specific devices on drivers for on-board AC'97 controllers like
1460 snd-intel8x0. Some hardware have swapped output pins between Master
1461 and Headphone, or Surround (thanks to confusion of AC'97
1462 specifications from version to version :-)
1464 The driver provides the auto-detection of known problematic devices,
1465 but some might be unknown or wrongly detected. In such a case, pass
1466 the proper value with this option.
1468 The following strings are accepted:
1469 - default Don't override the default setting
1470 - disable Disable the quirk
1471 - hp_only Bind Master and Headphone controls as a single control
1472 - swap_hp Swap headphone and master controls
1473 - swap_surround Swap master and surround controls
1474 - ad_sharing For AD1985, turn on OMS bit and use headphone
1475 - alc_jack For ALC65x, turn on the jack sense mode
1476 - inv_eapd Inverted EAPD implementation
1477 - mute_led Bind EAPD bit for turning on/off mute LED
1479 For backward compatibility, the corresponding integer value -1, 0,
1480 ... are accepted, too.
1482 For example, if "Master" volume control has no effect on your device
1483 but only "Headphone" does, pass ac97_quirk=hp_only module option.
1486 Configuring Non-ISAPNP Cards
1487 ============================
1489 When the kernel is configured with ISA-PnP support, the modules
1490 supporting the isapnp cards will have module options "isapnp".
1491 If this option is set, *only* the ISA-PnP devices will be probed.
1492 For probing the non ISA-PnP cards, you have to pass "isapnp=0" option
1493 together with the proper i/o and irq configuration.
1495 When the kernel is configured without ISA-PnP support, isapnp option
1496 will be not built in.
1499 Module Autoloading Support
1500 ==========================
1502 The ALSA drivers can be loaded automatically on demand by defining
1503 module aliases. The string 'snd-card-%1' is requested for ALSA native
1504 devices where %i is sound card number from zero to seven.
1506 To auto-load an ALSA driver for OSS services, define the string
1507 'sound-slot-%i' where %i means the slot number for OSS, which
1508 corresponds to the card index of ALSA. Usually, define this
1509 as the same card module.
1511 An example configuration for a single emu10k1 card is like below:
1512 ----- /etc/modprobe.conf
1513 alias snd-card-0 snd-emu10k1
1514 alias sound-slot-0 snd-emu10k1
1515 ----- /etc/modprobe.conf
1517 The available number of auto-loaded sound cards depends on the module
1518 option "cards_limit" of snd module. As default it's set to 1.
1519 To enable the auto-loading of multiple cards, specify the number of
1520 sound cards in that option.
1522 When multiple cards are available, it'd better to specify the index
1523 number for each card via module option, too, so that the order of
1524 cards is kept consistent.
1526 An example configuration for two sound cards is like below:
1528 ----- /etc/modprobe.conf
1530 options snd cards_limit=2
1531 alias snd-card-0 snd-interwave
1532 alias snd-card-1 snd-ens1371
1533 options snd-interwave index=0
1534 options snd-ens1371 index=1
1536 alias sound-slot-0 snd-interwave
1537 alias sound-slot-1 snd-ens1371
1538 ----- /etc/moprobe.conf
1540 In this example, the interwave card is always loaded as the first card
1541 (index 0) and ens1371 as the second (index 1).
1544 ALSA PCM devices to OSS devices mapping
1545 =======================================
1547 /dev/snd/pcmC0D0[c|p] -> /dev/audio0 (/dev/audio) -> minor 4
1548 /dev/snd/pcmC0D0[c|p] -> /dev/dsp0 (/dev/dsp) -> minor 3
1549 /dev/snd/pcmC0D1[c|p] -> /dev/adsp0 (/dev/adsp) -> minor 12
1550 /dev/snd/pcmC1D0[c|p] -> /dev/audio1 -> minor 4+16 = 20
1551 /dev/snd/pcmC1D0[c|p] -> /dev/dsp1 -> minor 3+16 = 19
1552 /dev/snd/pcmC1D1[c|p] -> /dev/adsp1 -> minor 12+16 = 28
1553 /dev/snd/pcmC2D0[c|p] -> /dev/audio2 -> minor 4+32 = 36
1554 /dev/snd/pcmC2D0[c|p] -> /dev/dsp2 -> minor 3+32 = 39
1555 /dev/snd/pcmC2D1[c|p] -> /dev/adsp2 -> minor 12+32 = 44
1557 The first number from /dev/snd/pcmC{X}D{Y}[c|p] expression means
1558 sound card number and second means device number. The ALSA devices
1559 have either 'c' or 'p' suffix indicating the direction, capture and
1560 playback, respectively.
1562 Please note that the device mapping above may be varied via the module
1563 options of snd-pcm-oss module.
1569 The ALSA driver fully supports the devfs extension.
1570 You should add lines below to your devfsd.conf file:
1572 LOOKUP snd MODLOAD ACTION snd
1573 REGISTER ^sound/.* PERMISSIONS root.audio 660
1574 REGISTER ^snd/.* PERMISSIONS root.audio 660
1576 Warning: These lines assume that you have the audio group in your system.
1577 Otherwise replace audio word with another group name (root for
1581 Proc interfaces (/proc/asound)
1582 ==============================
1584 /proc/asound/card#/pcm#[cp]/oss
1585 -------------------------------
1586 String "erase" - erase all additional informations about OSS applications
1587 String "<app_name> <fragments> <fragment_size> [<options>]"
1589 <app_name> - name of application with (higher priority) or without path
1590 <fragments> - number of fragments or zero if auto
1591 <fragment_size> - size of fragment in bytes or zero if auto
1592 <options> - optional parameters
1593 - disable the application tries to open a pcm device for
1594 this channel but does not want to use it.
1595 (Cause a bug or mmap needs)
1596 It's good for Quake etc...
1597 - direct don't use plugins
1598 - block force block mode (rvplayer)
1599 - non-block force non-block mode
1600 - whole-frag write only whole fragments (optimization affecting
1602 - no-silence do not fill silence ahead to avoid clicks
1603 - buggy-ptr Returns the whitespace blocks in GETOPTR ioctl
1604 instead of filled blocks
1606 Example: echo "x11amp 128 16384" > /proc/asound/card0/pcm0p/oss
1607 echo "squake 0 0 disable" > /proc/asound/card0/pcm0c/oss
1608 echo "rvplayer 0 0 block" > /proc/asound/card0/pcm0p/oss
1611 Early Buffer Allocation
1612 =======================
1614 Some drivers (e.g. hdsp) require the large contiguous buffers, and
1615 sometimes it's too late to find such spaces when the driver module is
1616 actually loaded due to memory fragmentation. You can pre-allocate the
1617 PCM buffers by loading snd-page-alloc module and write commands to its
1618 proc file in prior, for example, in the early boot stage like
1619 /etc/init.d/*.local scripts.
1621 Reading the proc file /proc/drivers/snd-page-alloc shows the current
1622 usage of page allocation. In writing, you can send the following
1623 commands to the snd-page-alloc driver:
1625 - add VENDOR DEVICE MASK SIZE BUFFERS
1627 VENDOR and DEVICE are PCI vendor and device IDs. They take
1628 integer numbers (0x prefix is needed for the hex).
1629 MASK is the PCI DMA mask. Pass 0 if not restricted.
1630 SIZE is the size of each buffer to allocate. You can pass
1631 k and m suffix for KB and MB. The max number is 16MB.
1632 BUFFERS is the number of buffers to allocate. It must be greater
1633 than 0. The max number is 4.
1637 This will erase the all pre-allocated buffers which are not in
1644 ALSA project homepage
1645 http://www.alsa-project.org
1647 ALSA Bug Tracking System
1648 https://bugtrack.alsa-project.org/bugs/
1651 mailto:alsa-devel@lists.sourceforge.net
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