[alsa-devel] Question about sound channel

Kuninori Morimoto kuninori.morimoto.gx at renesas.com
Wed Mar 21 08:44:49 CET 2012

Hi Takashi-san

Thank you for your advice

> > I have question about sound channel.
> > If input sound was MONO (= 1ch), but codec supports I2S (= 2ch) only,
> > How to output sound ?
> > What should the driver do in this case ?
> The driver should expose its capability just as is, i.e. in your case,
> support only two channels.  Then alsa-lib plugin will do the necessary
> thing in user-space, such as channel expansions, format conversions,
> rate conversions, etc.

Wow, I didn't know that.
Thank you, I understand.

Best regards
Kuninori Morimoto

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