[Linphone-developers] echo when using alsa dmix

[Guillermo Rodriguez Garcia]

Hello all,

I am using linphone-3.3.2 on Linux, and it works fine without echo.
However if I setup dmix for alsa, echo cancellation stops working.

This is what I added to my asound.conf file:

pcm.!default {
  type plug
  slave.pcm "swmixer"
}

pcm.swmixer {
  type dmix
  ipc_key 1234
  slave {
    pcm "hw:0,0"
    period_time 0
    period_size 1024
    buffer_size 4096
    rate 44100
  }
}

If I disable software mixing, then echo cancellation works fine.

Any suggestions on how to get echo cancellation to work with dmix?

Thanks,

GR