Copy hw out to loop problem when recording started before playing

Copy hw out to loop problem when recording started before playing

[Anton Nikolaev]

Hello everyone. Please help. Do not understand what is wrong

Chains is :
Plug asym1 -
  Out= Plug with multi (Copy hardware dmix output to dmix loopout)
  IN= Dsnoop with hardware dev

Plug asym2 -
  Out= plug dmix loop
  IN= plug dsnoop loop

Work good if playing to plug asym1 started before recording from asym2.
Not working play to asym1 if recording from asym2 started before playing to
asym1.

/Etc/asound.conf is:

pcm.hwcard0 { type hw; card 0; device 0; }

pcm.!default {
  type plug;
  slave.pcm { type asym; playback.pcm "devhwcopy"; capture.pcm "devhwin"; }
}

pcm.devhwcopy {
  type plug;
  route_policy "duplicate";
  slave.pcm {
    type multi; slaves {
      a { channels 2; pcm "devhwout"; }
      b { channels 2; pcm "devloopout"; }
    }
    bindings { 0 { slave a channel 0 } 1 { slave a channel 1 } 2 { slave b
channel 0 } 3 { slave b channel 1 } }
  }
  ttable [ [ 1 0 1 0 ] [ 0 1 0 1 ] ]
}

pcm.devhwout {
  type dmix; ipc_key 1024001; ipc_perm 0666; hw_ptr_alignment roundup;
  slave { pcm "hwcard0"; channels 2; period_size 1024; buffer_size 8192; }
  bindings { 0 0 1 1 }
}

pcm.devhwin {
  type dsnoop; ipc_key 1024002; ipc_perm 0666;
  slave { pcm "hwcard0"; channels 2; rate 44100; period_size 1024;
buffer_size 8192; }
  bindings { 0 0 1 1 }
}

pcm.devloopout {
  type dmix; ipc_key 1024011; ipc_perm 0666;
  slave { pcm "hw:LOOPCARD,0,0"; channels 2; period_size 1024; buffer_size
8192; }
  bindings { 0 0 1 1 }
}

pcm.devloopin {
  type dsnoop; ipc_key 1024012; ipc_perm 0666;
  slave { pcm "hw:LOOPCARD,1,0"; channels 2; rate 44100; period_size 1024;
buffer_size 8192; }
  bindings { 0 0 1 1 }
}

pcm.devloop {
  type plug;
  slave.pcm { type asym; playback.pcm "devloopout"; capture.pcm
"devloopin"; }
}

(English is not native for me, sorry)