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es1371
Package: linux-2.4.20.tar.gz [view]
Upload User: jlfgdled
Upload Date: 2013-04-10
Package Size: 33168k
Code Size: 2k
Category:
Linux-Unix program
Development Platform:
Unix_Linux
- /proc/sound, /dev/sndstat
- -------------------------
- /proc/sound and /dev/sndstat is not supported by the
- driver. To find out whether the driver succeeded loading,
- check the kernel log (dmesg).
- ALaw/uLaw sample formats
- ------------------------
- This driver does not support the ALaw/uLaw sample formats.
- ALaw is the default mode when opening a sound device
- using OSS/Free. The reason for the lack of support is
- that the hardware does not support these formats, and adding
- conversion routines to the kernel would lead to very ugly
- code in the presence of the mmap interface to the driver.
- And since xquake uses mmap, mmap is considered important :-)
- and no sane application uses ALaw/uLaw these days anyway.
- In short, playing a Sun .au file as follows:
- cat my_file.au > /dev/dsp
- does not work. Instead, you may use the play script from
- Chris Bagwell's sox-12.14 package (available from the URL
- below) to play many different audio file formats.
- The script automatically determines the audio format
- and does do audio conversions if necessary.
- http://home.sprynet.com/sprynet/cbagwell/projects.html
- Blocking vs. nonblocking IO
- ---------------------------
- Unlike OSS/Free this driver honours the O_NONBLOCK file flag
- not only during open, but also during read and write.
- This is an effort to make the sound driver interface more
- regular. Timidity has problems with this; a patch
- is available from http://www.ife.ee.ethz.ch/~sailer/linux/pciaudio.html.
- (Timidity patched will also run on OSS/Free).
- MIDI UART
- ---------
- The driver supports a simple MIDI UART interface, with
- no ioctl's supported.
- MIDI synthesizer
- ----------------
- This soundcard does not have any hardware MIDI synthesizer;
- MIDI synthesis has to be done in software. To allow this
- the driver/soundcard supports two PCM (/dev/dsp) interfaces.
- There is a freely available software package that allows
- MIDI file playback on this soundcard called Timidity.
- See http://www.cgs.fi/~tt/timidity/.
- Thomas Sailer
- t.sailer@alumni.ethz.ch
