ALSA и 5.1 [SOLVED]

подскажите, можно ли настроить в ALSA преобразование стерео в 5.1?

asoundrc:
pcm.FRONT {
type hw
card 0
device 0
}
ctl.FRONT {
type hw
card 0
}
pcm.REAR {
type hw
card 0
device 1
}
pcm.CENTER_LFE {
type hw
card 0
device 3
}
pcm.SURROUND_51 {
type plug
slave.pcm COMBINE
route_policy default
ttable.0.0 1
ttable.1.1 1
ttable.0.2 1
ttable.1.3 1
ttable.0.4 1
ttable.1.5 1
}
pcm.COMBINE {
type multi
slaves [
{
pcm FRONT
channels 2
}
{
pcm REAR
channels 2
}
{
pcm CENTER_LFE
channels 2
}
]
bindings [
{ slave 0 channel 0 }
{ slave 0 channel 1 }
{ slave 1 channel 0 }
{ slave 1 channel 1 }
{ slave 2 channel 0 }
{ slave 2 channel 1 }
]
}

запускаю прослушивание mp3 mplayer -channels 6, но все равно играет в стерео