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

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.