[alsa-devel] ASoC: How to mix multi input ?

Hi Mark, ALSA SoC

I would like to ask you how to mix multi input in ASoC. Renesas sound device(s) can mix multi input to 1 output.

+-+ sound A --> |M| sound B --> |I| --> [ codec ] -> speaker sound C --> |X| +-+

Here, sound A/B/C will be used randomly. Does ALSA SoC already has this kind of system ?

My image about these are like this.

sound A: aplay -D hw:0 ... sound B: aplay -D hw:1 ... sound C: aplay -D hw:2 ... ...

codec will be started if one of A/B/C are started, and it will be stopped if all of A/B/C are stopped.