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[Linphone-developers] echo when using alsa dmix

From: Guillermo Rodriguez Garcia
Subject: [Linphone-developers] echo when using alsa dmix
Date: Thu, 17 Mar 2011 09:58:51 +0100
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; es-ES; rv: Gecko/20110303 Thunderbird/3.1.9

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?



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