[linux-audio-dev] ALSA performance issues?

Lee Revell rlrevell at joe-job.com
Sun Dec 31 05:46:20 UTC 2006

On Sat, 2006-12-23 at 14:08 +0100, Mario Lang wrote:
> Excuse my ignorance please, but how do I reliably determine
> if dmix is the default device?  For instance, ogg123, which uses
> libao, only offers -o card:N and such, but no -o device:"string", so
> I am kind of wondering if libao clients do perhaps always play on a
> hw device? 

libao's ALSA device selection is pretty much correct - it uses "default"
PCM if no device is specified, and other devices can be selected like

ogg123 -d alsa09 -o dev:"hw:0,0" file.ogg

Unfortunately the ALSA device selection syntax isn't documented in the
manpage so I had to figure this out by code inspection and trial &


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