diff --git a/bbb-voice-conference/config/freeswitch/conf/vars.xml b/bbb-voice-conference/config/freeswitch/conf/vars.xml
index 95eb9a051560c51260163307da8c6b81a245c889..24e94cf37eb9cc436e175be7e900c4ae8c163d3e 100644
--- a/bbb-voice-conference/config/freeswitch/conf/vars.xml
+++ b/bbb-voice-conference/config/freeswitch/conf/vars.xml
@@ -123,8 +123,13 @@
        127 - BV32
 
   -->
+        <X-PRE-PROCESS cmd="set" data="global_codec_prefs=PCMU,G722,PCMA,GSM"/>
+        <X-PRE-PROCESS cmd="set" data="outbound_codec_prefs=PCMU,G722,PCMA,GSM"/>
+
+	<!-- BigBlueButton: To use speex, uncomment these two lines and comment the above two lines
   <X-PRE-PROCESS cmd="set" data="global_codec_prefs=speex@16000h@20i,speex@8000h@20i,G7221@32000h,G7221@16000h,G722,PCMU,PCMA,GSM"/>
   <X-PRE-PROCESS cmd="set" data="outbound_codec_prefs=speex@16000h@20i,PCMU,PCMA,GSM"/>
+	-->
 
   <!--
       xmpp_client_profile and xmpp_server_profile