ALSA tips and tricks

1. If a single channel is selected, the left channel is used. For example using the next function:

int snd_pcm_hw_params_set_channels

(

snd_pcm_t *

pcm,

snd_pcm_hw_params_t *

params,

unsigned int

val

)

If val parameter take value 1, meaning 1 channel (mono), the left channeel of the hardware input will be used.