- remove the xml tag from comment as they still get processed and overrides the config

bbb-voice-conference/config/freeswitch/conf/vars.xml

@@ -123,12 +123,12 @@
        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"/>
+	<!-- BigBlueButton: To use speex, change the above two lines with data set to these values. 
+             data="global_codec_prefs=speex@16000h@20i,speex@8000h@20i,G7221@32000h,G7221@16000h,G722,PCMU,PCMA,GSM"
+             data="outbound_codec_prefs=speex@16000h@20i,PCMU,PCMA,GSM"
 	-->
 
   <!--