linux-stable-rt/Documentation/sound/oss
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00
..
AD1816
ALS
AWE32
AudioExcelDSP16
CMI8330
CMI8338
CS4232
ESS
ESS1868
INSTALL.awe
Introduction
MAD16
Maestro
Maestro3
MultiSound
NEWS
NM256
OPL3
OPL3-SA
OPL3-SA2
Opti
PAS16
PSS
PSS-updates
README.OSS
README.awe
README.modules
README.ymfsb
SoundPro
Soundblaster
Tropez+
VIA-chipset
VIBRA16
WaveArtist
Wavefront
btaudio
cs46xx
es1370
es1371
mwave
rme96xx
solo1
sonicvibes
ultrasound
vwsnd

README.ymfsb

Legacy audio driver for YMF7xx PCI cards.


FIRST OF ALL
============

  This code references YAMAHA's sample codes and data sheets.
  I respect and thank for all people they made open the informations
  about YMF7xx cards.

  And this codes heavily based on Jeff Garzik <jgarzik@pobox.com>'s
  old VIA 82Cxxx driver (via82cxxx.c). I also respect him.


DISCLIMER
=========

 This driver is currently at early ALPHA stage. It may cause serious
 damage to your computer when used.
 PLEASE USE IT AT YOUR OWN RISK.


ABOUT THIS DRIVER
=================

  This code enables you to use your YMF724[A-F], YMF740[A-C], YMF744, YMF754
 cards. When enabled, your card acts as "SoundBlaster Pro" compatible card.
 It can only play 22.05kHz / 8bit / Stereo samples, control external MIDI
 port.
 If you want to use your card as recent "16-bit" card, you should use
 Alsa or OSS/Linux driver. Of course you can write native PCI driver for
 your cards :)


USAGE
=====

 # modprobe ymfsb (options)


OPTIONS FOR MODULE
==================

  io           : SB base address     (0x220, 0x240, 0x260, 0x280)
  synth_io     : OPL3 base address   (0x388, 0x398, 0x3a0, 0x3a8)
  dma          : DMA number          (0,1,3)
  master_volume: AC'97 PCM out Vol   (0-100)
  spdif_out    : SPDIF-out flag      (0:disable 1:enable)

 These options will change in future...


FREQUENCY
=========

  When playing sounds via this driver, you will hear its pitch is slightly
 lower than original sounds. Since this driver recognizes your card acts
 with 21.739kHz sample rates rather than 22.050kHz (I think it must be
 hardware restriction). So many players become tone deafness.
 To prevent this, you should express some options to your sound player
 that specify correct sample frequency. For example, to play your MP3 file
 correctly with mpg123, specify the frequency like following:

  %  mpg123 -r 21739 foo.mp3


SPDIF OUT
=========

  With installing modules with option 'spdif_out=1', you can enjoy your
 sounds from SPDIF-out of your card (if it had).
 Its Fs is fixed to 48kHz (It never means the sample frequency become 
 up to 48kHz. All sounds via SPDIF-out also 22kHz samples). So your
 digital-in capable components has to be able to handle 48kHz Fs.


COPYING
=======

 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2, or (at your option)
 any later version.

 This program is distributed in the hope that it will be useful, but
 WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.


TODO
====
 * support for multiple cards
   (set the different SB_IO,MPU_IO,OPL_IO for each cards)

 * support for OPL (dmfm) : There will be no requirements... :-<


AUTHOR
======

 Daisuke Nagano <breeze.nagano@nifty.ne.jp>