I have configured a conference on new installation of freeswitch, every thing works fine voice quality is good when lady says that "You are the only one in this conference" and music but as soon as other party get connected and started to talk voice get choppy/noisy nothing can be understood, like if someone says "HELLO" other party listen jerking noisy voice like "---$H^----#E@----%LL^----*O&"
<?xml version="1.0"?>
<include>
<configuration name="conference.conf">
<caller-controls>
<group name="default-keymap">
<control action="vol talk dn" digits="1"/>
<control action="vol talk zero" digits="2"/>
<control action="vol talk up" digits="3"/>
<control action="vol listen dn" digits="4"/>
<control action="vol listen zero" digits="5"/>
<control action="vol listen up" digits="6"/>
<control action="energy dn" digits="7"/>
<control action="energy equ" digits="8"/>
<control action="energy up" digits="9"/>
<control action="deaf mute" digits="*"/>
<control action="mute" digits="0"/>
</group>
</caller-controls>
<profiles>
<profile name="conference_1">
<param name="rate" value="8000"/> <!-- Here I tried all possible values but no luck -->
<param name="interval" value="20"/>
<param name="energy-level" value="20"/>
<param name="sound-prefix" value="$${sounds_dir}/en/us/callie"/>
<param name="caller-controls" value="default-keymap"/>
<param name="tts-engine" value="flite"/>
<param name="tts-voice" value="kal"/>
<param name="muted-sound" value="conference/conf-muted.wav"/>
<param name="mute-detect-sound" value=""/>
<param name="max-members" value=""/>
<param name="max-members-sound" value=""/>
<param name="comfort-noise" value="1"/>
<param name="suppress-events" value=""/>
<param name="verbose-events" value=""/>
<param name="unmuted-sound" value="conference/conf-unmuted.wav"/>
<param name="alone-sound" value="conference/conf-alone.wav"/>
<param name="moh-sound" value="local_stream://moh"/>
<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"/>
</profile>
</profiles>
</configuration>
</include>