Re: [alsa-devel] SPDIF: How to play mono sound

Dne 8.11.2011 11:04, ajay khandelwal napsal(a):

Hi all, I have a pc with SPDIF out. I want to play audio file with single channel(mono) using aplay.

How to do that, when I try to play with following command, it gives error

aplay -Diec958:CARDICH6,DEV=0 mono_music.wav

it gives following error aplay: set_param:1065: Channels count not available.

How about

aplay -Dplug:iec958:CARDICH6,DEV=0 mono_music.wav

Spdif is a stereo device and does not accept a single channel stream. The plug plugin will do the conversion:

Plug PCM: Route conversion PCM (sformat=S16_LE) Transformation table: 0 <- 0 1 <- 0

Pavel.