Re: Alsa, Kernel OSS

[Takashi Iwai]

At Mon, 3 Mar 2003 17:09:46 +0100,
Marc Giger wrote:
> 
> > > Why can't I play more than one sources on the same time with such a
> > > card? All programs which would access /dev/dsp blocks until the other
> > > programs frees the device... It isn't very useful. 
> > > 
> > > I have no such problems with multiple sources as example on my
> > > SBLive or on my yamaha sound card with the snd-ymfpci driver. 
> > > 
> > > Do I miss some settings?
> > 
> > no, it's the hardware limitation.
> 
> Ok, I see..cheap hardware..
> 
> But multiple sources on window$ works..
> In this case, windows mixes the sources in software - right?

yes.

> Is it a big "problem" to do this also in Linux?
> This would be an interesting work for me:-)
> Perhaps a program as interface between userspace and alsa-driver?

the latest alsa-lib supports the dynamic software mixing.
it works like a charm :)

> Or better directly in the alsa-driver? 

no, basically it's a user-space job.

ciao,

Takashi