Subject: Re: [linux-audio-dev] some basic sound questions
From: Jaroslav Kysela (perex_AT_jcu.cz)
Date: pe marras 13 1998 - 07:42:55 EST
On Fri, 13 Nov 1998, Paul Winkler wrote:
> > * A program to record audio post-facto, such as the Win95 "pfau" > (snip)... If you hear an audio bit that you want to save, you signal
> > the program somehow and it keeps that last chunk in a timestamped file that
> > you can then edit. (Hmm, with a /proc/audio on your system such a program
> > would probably be trivial to write.)
>
> Really good idea!
>
> > Speaking of /proc/audio -- the paudio module at
> > <http://source.syr.edu/~jdimpson/proj/> creates a /proc/audio file that
> > allows you to save whatever data is currently going through the soundcard.
>
> Yep, it sounds cool... but I discovered that it only works with a
> specially-patched OSS-free, not OSS-Linux or ALSA. OSS-Linux now has a
^^^^
THIS IS NOT TRUE!!! WHY PEOPLE DON'T READ README FILES ??? :-((((((((((
ALSA DRIVER HAVE THIS FEATURE FROM 0.0.X VERSIONS !!!!!!!!!!!!!!!!!!!!!!
>From alsa-driver/README:
* digital audio (PCM)
- new enhanced API for applications
- full real duplex support
- full duplex support for SoundBlaster 16/AWE soundcards
- digital audio data for playback and record should be read back using
proc filesystem
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Look to /proc/asound/0/pcm0/pcm0p and /proc/asound/0/pcm0/pcm0r files
etc... In 0.2.0-pre10 is this interface extended for packet mode which
can send to application information like format etc...
Jaroslav
-----
Jaroslav Kysela <perex_AT_jcu.cz>
Academic Computer Centre, University of South Bohemia
Branisovska 31, C. Budejovice, CZ-370 05 Czech Republic
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