22 Aug
2011
22 Aug
'11
1:21 p.m.
On Mon, Aug 22, 2011 at 12:15:58PM +0200, Takashi Iwai wrote:
Scott Jiang wrote:
In kernel 2.6.34 I can use aplay to play audio at the same time, alsa will mix the audio.
No, kernel part doesn't do such a thing. If it's mixed, it must be in the user-space (either dmix or a daemon like pulseaudio), unless you hardware can do mixing by itself.
There *are* some cards (mostly older ones like emu10k) that support multiple streams transparently but this has never been supported in ASoC due a lack of hardware that can do it.