[Freeswitch-users] Audio delay when conferencing

[Chris Fowler]

I'm using FreeSWITCH (Build 13168M) and we're having intermittent multi-second delays on conference bridges with more than three participants (this is not a new issue - just bubbled to the top of the stack to address).

The server is running on Amazon's AWS c1.medium instance, CentOS 5.0 with Kernel 2.6.18 32-bit i386.

I recorded a conference which shows the problem nicely:  http://cfowl.postinbox.com/c.wav

Callers are coming on via the internal sofia profile from various physical locations.  I'm not sure how to proceed with debugging this issue - advice welcome.

  <profiles>
    <profile name="default">
      <param name="domain" value="$${domain}"/>
      <param name="rate" value="32000"/>
      <param name="interval" value="10"/>
      <param name="energy-level" value="100"/>
      <param name="member-flags" value="waste"/>
      <param name="caller-controls" value="rightscale"/>
      <param name="sound-prefix" value="$${base_dir}/sounds/en/us/callie"/>
      <param name="muted-sound" value="conference/conf-muted.wav"/>
      <param name="unmuted-sound" value="conference/conf-unmuted.wav"/>
      <param name="alone-sound" value="conference/conf-alone.wav"/>
      <param name="moh-sound" value="$${hold_music}"/>
      <param name="enter-sound" value="tone_stream://%(200,0,500,600,700)"/>
      <param name="exit-sound" value="tone_stream://%(500,0,300,200,100,50,25)"/>
      <param name="kicked-sound" value="conference/conf-kicked.wav"/>
      <param name="locked-sound" value="conference/conf-locked.wav"/>
      <param name="is-locked-sound" value="conference/conf-is-locked.wav"/>
      <param name="is-unlocked-sound" value="conference/conf-is-unlocked.wav"/>
      <param name="pin-sound" value="conference/conf-pin.wav"/>
      <param name="bad-pin-sound" value="conference/conf-bad-pin.wav"/>
      <param name="comfort-noise-level" value="1400"/>
      <param name="caller-id-name" value="$${outbound_caller_name}"/>
      <param name="caller-id-number" value="$${outbound_caller_id}"/>
      <param name="comfort-noise" value="true"/>
    </profile>

Thanks, Chris.