As far as I know this can only be accomplished with an app that listens to events. In mod_conference you will see that there are start talk and stop talk events. If you monitor all conference members then you could pause/un-pause based on whether anyone was speaking.<br>
<br>I recommend you read up on <a href="http://wiki.freeswitch.org/wiki/Event_Socket_Library">ESL</a> and <a href="http://wiki.freeswitch.org/wiki/Mod_conference">mod_conference</a> on the wiki as a starting point.<br><br>
-MC<br><br><div class="gmail_quote">On Tue, Jan 8, 2013 at 6:12 PM, 王迪 <span dir="ltr">&lt;<a href="mailto:wangd@alongtechnology.com.cn" target="_blank">wangd@alongtechnology.com.cn</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<u></u>



<div style="FONT-FAMILY:verdana;FONT-SIZE:10pt">
<div><font>How to pause and resume play an audio file in conference?  
For example: I create a conference room with some members, and play an 
audio file to them. When someone start-talking, I pause the playing. When nobody 
talking, I resume play the audio file.</font></div></div>
<br>_________________________________________________________________________<br>
Professional FreeSWITCH Consulting Services:<br>
<a href="mailto:consulting@freeswitch.org">consulting@freeswitch.org</a><br>
<a href="http://www.freeswitchsolutions.com" target="_blank">http://www.freeswitchsolutions.com</a><br>
<br>
FreeSWITCH-powered IP PBX: The CudaTel Communication Server<br>
<a href="http://www.cudatel.com" target="_blank">http://www.cudatel.com</a><br>
<br>
Official FreeSWITCH Sites<br>
<a href="http://www.freeswitch.org" target="_blank">http://www.freeswitch.org</a><br>
<a href="http://wiki.freeswitch.org" target="_blank">http://wiki.freeswitch.org</a><br>
<a href="http://www.cluecon.com" target="_blank">http://www.cluecon.com</a><br>
<br>
FreeSWITCH-dev mailing list<br>
<a href="mailto:FreeSWITCH-dev@lists.freeswitch.org">FreeSWITCH-dev@lists.freeswitch.org</a><br>
<a href="http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev" target="_blank">http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev</a><br>
UNSUBSCRIBE:<a href="http://lists.freeswitch.org/mailman/options/freeswitch-dev" target="_blank">http://lists.freeswitch.org/mailman/options/freeswitch-dev</a><br>
<a href="http://www.freeswitch.org" target="_blank">http://www.freeswitch.org</a><br>
<br></blockquote></div><br><br clear="all"><br>-- <br>Michael S Collins<br>Twitter: @mercutioviz<br><a href="http://www.FreeSWITCH.org" target="_blank">http://www.FreeSWITCH.org</a><br><a href="http://www.ClueCon.com" target="_blank">http://www.ClueCon.com</a><br>
<a href="http://www.OSTAG.org" target="_blank">http://www.OSTAG.org</a><br><br>