[Comm] alsa oss dmix

[Michael Shigorin <mike@osdn.org.ua>]

	Здравствуйте.
Нашлось неплохое объяснение насчёт alsa, oss и воспроизведения
нескольких потоков (почему работает через aoss и не работает
через /dev/dsp):

---
Nigel Henry <cave.dnb <at> tiscali.fr> writes:
> Bear in mind that the majority of soundcards are incapable of handling 
> multiple audio streams, the Ensoniq included, therefore it's a case of just 
> one music app at a time.

In hardware, that is. ALSA normally provides mixing in software through dmix...

> The workaround I use to listen to Internet radio using the BBC radioplayer on 
> Opera, is to make sure that the alsa-oss package is installed, and start 
> Opera as,
> aoss opera

... but it doesn't work when emulating the old OSS (Open Sound System) 
interface in the kernel, aoss emulates it in userspace, and that works with 
dmix.

By the way, that's for Fedora releases up to Fedora 7. Fedora 8 normally uses 
PulseAudio instead of dmix. There, you'd normally use padsp instead of aoss.

        Kevin Kofler
--- http://www.redhat.com/archives/rhl-list/2007-December/msg03150.html

-- 
 ---- WBR, Michael Shigorin <mike@altlinux.ru>
  ------ Linux.Kiev http://www.linux.kiev.ua/