Play back of audio with the 'playback' command produced garbled audio. First, I found a message complaining that the sample rate was 8K instead of 16K - re-sampling brought no joy. (This begs the questions - what is the best audio format for playback of messages? File type - sample rate? etc - If I record via the 'record' application, the file is : Sample Rate : 8000 Precision : 16-bit Bit Rate : 128k Sample Encoding: 16-bit Signed Integer PCM But is seems to expect 16000 sample rates to play back? What is the internal audio traffic in freeswitch based on? ) <back to main issue > Then I noticed that the garbling occurred on a polycom IP560 phone as the zrtp utils messages were getting dumped in the log. Doing a global_setvar zrtp_secure_media=false Fixes the problem. Seems like this should fail more gracefully? I have the latest Debian - 1.2.12~2-1~wheezy+1 ( Placing <variable name="zrtp_secure_media" value="false" /> in the directory entry also fixes the problem ) EXECUTE sofia/internal/11@hostname playback(mysounds/answer.wav) 2013-10-10 00:53:44.989857 [DEBUG] switch_ivr_play_say.c:1315 Codec Activated L16@16000hz 1 channels 20ms 2013-10-10 00:53:45.010017 [DEBUG] switch_core_session.c:999 Send signal sofia/internal/11@hostname [BREAK] 2013-10-10 00:53:45.010017 [DEBUG] switch_core_session.c:999 Send signal sofia/internal/11@hostname [BREAK] 2013-10-10 00:53:45.010017 [DEBUG] switch_core_session.c:999 Send signal sofia/internal/11@hostname [BREAK] 2013-10-10 00:53:45.029906 [DEBUG] sofia.c:5720 Channel sofia/internal/11@hostname entering state [ready][200] 2013-10-10 00:53:45.049900 [DEBUG] switch_rtp.c:928 [ zrtp utils]: Send <HELLO> ssrc=307819312 seq=36849 size=144. Stream 39:CLEAR:START 2013-10-10 00:53:45.129740 [DEBUG] switch_rtp.c:3706 Correct ip/port confirmed. 2013-10-10 00:53:45.149778 [DEBUG] switch_rtp.c:928 [ zrtp utils]: Send <HELLO> ssrc=307819312 seq=36850 size=144. Stream 39:CLEAR:START 2013-10-10 00:53:45.349846 [DEBUG] switch_rtp.c:928 [ zrtp utils]: Send <HELLO> ssrc=307819312 seq=36851 size=144. Stream 39:CLEAR:START 2013-10-10 00:53:45.549840 [DEBUG] switch_rtp.c:928 [ zrtp utils]: Send <HELLO> ssrc=307819312 seq=36852 size=144. Stream 39:CLEAR:START 2013-10-10 00:53:45.749841 [DEBUG] switch_rtp.c:928 [ zrtp engine]: WARNING! HELLO have been resent 5 times without a response. Raising ZRTP_EVENT_NO_ZRTP_QUICK event. ID=39 2013-10-10 00:53:45.749841 [DEBUG] switch_rtp.c:928 [ zrtp utils]: Send <HELLO> ssrc=307819312 seq=36853 size=144. Stream 39:CLEAR:START 2013-10-10 00:53:45.949840 [DEBUG] switch_rtp.c:928 [ zrtp utils]: Send <HELLO> ssrc=307819312 seq=36854 size=144. Stream 39:CLEAR:START 2013-10-10 00:53:46.149819 [DEBUG] switch_rtp.c:928 [ zrtp utils]: Send <HELLO> ssrc=307819312 seq=36855 size=144. Stream 39:CLEAR:START 2013-10-10 00:53:46.349793 [DEBUG] switch_rtp.c:928 [ zrtp utils]: Send <HELLO> ssrc=307819312 seq=36856 size=144. Stream 39:CLEAR:START 2013-10-10 00:53:46.549841 [DEBUG] switch_rtp.c:928 [ zrtp utils]: Send <HELLO> ssrc=307819312 seq=36857 size=144. Stream 39:CLEAR:START 2013-10-10 00:53:46.749792 [DEBUG] switch_rtp.c:928 [ zrtp utils]: Send <HELLO> ssrc=307819312 seq=36858 size=144. Stream 39:CLEAR:START 2013-10-10 00:53:46.969846 [DEBUG] switch_rtp.c:928 [ zrtp utils]: Send <HELLO> ssrc=307819312 seq=36859 size=144. Stream 39:CLEAR:START 2013-10-10 00:53:47.169786 [DEBUG] switch_rtp.c:928 [ zrtp utils]: Send <HELLO> ssrc=307819312 seq=36860 size=144. Stream 39:CLEAR:START 2013-10-10 00:53:47.369841 [DEBUG] switch_rtp.c:928 [ zrtp utils]: Send <HELLO> ssrc=307819312 seq=36861 size=144. Stream 39:CLEAR:START 2013-10-10 00:53:47.569842 [DEBUG] switch_rtp.c:928 [ zrtp utils]: Send <HELLO> ssrc=307819312 seq=36862 size=144. Stream 39:CLEAR:START 2013-10-10 00:53:47.769850 [DEBUG] switch_rtp.c:928 [ zrtp utils]: Send <HELLO> ssrc=307819312 seq=36863 size=144. Stream 39:CLEAR:START 2013-10-10 00:53:47.969844 [DEBUG] switch_rtp.c:928 [ zrtp utils]: Send <HELLO> ssrc=307819312 seq=36864 size=144. Stream 39:CLEAR:START 2013-10-10 00:53:48.169838 [DEBUG] switch_rtp.c:928 [ zrtp utils]: Send <HELLO> ssrc=307819312 seq=36865 size=144. Stream 39:CLEAR:START 2013-10-10 00:53:48.369839 [DEBUG] switch_rtp.c:928 [ zrtp utils]: Send <HELLO> ssrc=307819312 seq=36866 size=144. Stream 39:CLEAR:START 2013-10-10 00:53:48.569849 [DEBUG] switch_rtp.c:928 [ zrtp utils]: Send <HELLO> ssrc=307819312 seq=36867 size=144. Stream 39:CLEAR:START 2013-10-10 00:53:48.769843 [DEBUG] switch_rtp.c:928 [ zrtp engine]: WARNING! HELLO Max retransmissions count reached (20 retries). ID=39 2013-10-10 00:53:48.769843 [DEBUG] switch_rtp.c:928 [ zrtp]: Stream ID=39 CLEAR switching <START> ---> <NOZRTP>. 2013-10-10 00:53:51.569844 [DEBUG] switch_core_session.c:999 Send signal sofia/internal/11@hostname [BREAK] -------------------------------------------------------------------------------- Karl Schmidt EMail Karl@xtronics.com Transtronics, Inc. WEB http://secure.transtronics.com 3209 West 9th Street Ph (785) 841-3089 Lawrence, KS 66049 FAX (785) 841-0434 Borrow money from pessimists - they don't expect it back. --------------------------------------------------------------------------------