Re: PCM hw mixing with volume

[Manuel Jander <manuel.jander@mat.utfsm.cl>]

Hi,

Aureal Hardware can do this in hardware, but this feature has not been
exposed. I would be interested :D Maybe this could be done using some
well defined  controls. That would be needed for OpenAL support anyway.
Any comments ?

Best Regards

Manuel Jander

On Sun, 2004-03-07 at 10:51, Ove Kaaven wrote:
> We have some games that want to mix several dynamic sound streams.
> That's easy enough at first glance, just snd_pcm_open() for each stream
> they want to output (and do software mixing when that fails). However,
> it seems that they want each stream to have independent volume and pan
> controls.
> 
> As far as I can tell, this is possible to do on SB Live and Audigy by
> messing with the "EMU10K1 PCM Send" volume controls, but this is pretty
> device-specific and few other hw-mixing ALSA drivers seem to have
> exposed such a feature. (And software plugins are not of interest.)
> 
> Are you planning to standardize such features or design a
> device-independent API for it? (And my manager wants to know which ALSA
> release this might get implemented in...)
> 
> 
> 
> 
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