On Sat, 2003-09-13 at 23:06, Paul Davis wrote:
> ALSA now offers the "dmix" plugin layer that allows multiple
> applications to write to a PCM device without locks. just tell an ALSA
> aware app to use "dmix:0" and both it and many other apps will all be
> able to share the device.
Wow, it's good to see something like that. :-)
I just tried it, though, and it didn't seem to want to work for me...
With my .asoundrc looking like this:
pcm.main {
type dmix
slave {
pcm default
}
}
I got this, running alsaplayer -d main /path/to/wav/file :
ALSA lib pcm_dmix.c:1184:(_snd_pcm_dmix_open) Unique IPC key is not defined
snd_pcm_open: Invalid argument (main)
Failed to initialize plugin!
Failed to register plugin: /usr/lib/alsaplayer/output/libalsa_out.so
Failed to load output plugin "alsa". Trying defaults.
ALSA lib pcm_dmix.c:1184:(_snd_pcm_dmix_open) Unique IPC key is not defined
snd_pcm_open: Invalid argument (main)
Failed to initialize plugin!
/usr/lib/alsaplayer/output/libalsa_out.so failed to load
If I run alsaplayer -d dmix:0 /path/to/wav/file, I get this:
ALSA lib pcm.c:1908:(snd_pcm_open_noupdate) Unknown PCM 0
ALSA lib pcm_dmix.c:954:(snd_pcm_dmix_open) unable to open slave
snd_pcm_open: No such file or directory (dmix:0)
Failed to initialize plugin!
Failed to register plugin: /usr/lib/alsaplayer/output/libalsa_out.so
Failed to load output plugin "alsa". Trying defaults.
ALSA lib pcm.c:1908:(snd_pcm_open_noupdate) Unknown PCM 0
ALSA lib pcm_dmix.c:954:(snd_pcm_dmix_open) unable to open slave
snd_pcm_open: No such file or directory (dmix:0)
Failed to initialize plugin!
/usr/lib/alsaplayer/output/libalsa_out.so failed to load
So I see it really isn't working for me.
> and remember that Linux (and Mac OS X) also have JACK, which offers a
> service that isn't exactly matched on Windows, though rewire comes
> close, sort of.
I see how the various Linux audio offerings may be superior to what you
can do with Windows, in a real professional setup... but for being able
to play multiple things at once, unless DMIX pans out, Windows may have
us beaten. :-\
Is there a way to force OSS emulation to use the dmix plugin?
:::off to grep the great WWW for dmix info:::
Rob
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