i configure asound.conf
pcm.dmix_stream
{
type dmix
ipc_key 321456
ipc_key_add_uid true
slave.pcm "hw:2,0"
}
pcm.ch1 {
type plug
slave {
pcm dmix_stream
channels 2
}
ttable.0.0 1
}
pcm.ch2 {
type plug
slave {
pcm dmix_stream
channels 2
}
ttable.0.1 1
}
pcm.!default
{
type asym
playback.pcm
{
type plug
slave.pcm "ch1"
}
capture.pcm
{
type plug
slave.pcm "hw:2,0"
}
}
it works