[alsa-devel] How to mix two PCM channels with ALSA

[itxEpsilon]

Clemens Ladisch <clemens <at> ladisch.de> writes:

> 
> itxEpsilon wrote:
> > I'm trying to write a simple application
> > for mixing two PCM sound channels in
> > C++. Could anyone provide me a
> > quick example about how to implement
> > this operation?
> 
>   outputSample[i] = inputChannel1[i] + inputChannel2[i];
> 
> What does this have to do with ALSA?
> 
> Regards,
> Clemens
> 

Hi,
That's no my question, I'd like to know how is performed with the ALSA API.

i.e. 

playSound(buffer1);
playSound(buffer2);

is it implicitly mixed when playing two buffers by hardware?

Thanks.
Carlos.