pcm.!default { type asym playback.pcm "LoopAndReal" #capture.pcm "looprec" capture.pcm "hw:0,0" } pcm.looprec { type hw card "Loopback" device 1 subdevice 0 } pcm.LoopAndReal { type plug slave.pcm mdev route_policy "duplicate" } pcm.mdev { type multi slaves.a.pcm pcm.MixReale slaves.a.channels 2 slaves.b.pcm pcm.MixLoopback slaves.b.channels 2 bindings.0.slave a bindings.0.channel 0 bindings.1.slave a bindings.1.channel 1 bindings.2.slave b bindings.2.channel 0 bindings.3.slave b bindings.3.channel 1 } pcm.MixReale { type dmix ipc_key 1024 ipc_perm 0666 # mixing for all users slave { pcm "hw:0,0" rate 48000 #rate 44100 periods 128 period_time 0 period_size 1024 # must be power of 2 buffer_size 8192 } } pcm.MixLoopback { type dmix ipc_key 1025 ipc_perm 0666 # mixing for all users slave { pcm "hw:Loopback,0,0" rate 48000 #rate 44100 periods 128 period_time 0 period_size 1024 # must be power of 2 buffer_size 8192 } }