Ok heres hoping one of you Asterisk Guru's has had this issue and fixed it successfully.
I am running Asterisk 1.2.24 and am having problems during calls to Playback() or Background() during an IVR menu. The sound file is "choppy" or "jittery", almost like all the voice packets are not being transmitted. Its worth mentioning these sound files have been professionally recorded in a recording studio. The files are WAV files encoded as 16bit, 8kHz, PCM per the Asterisk documentation. The sound files play perfectly on my desktop computer, there is no sound issues locally. Its only when they are loaded to the server they sound bad.
The server is hosted in our data center and is an Intel Xeon 3.0Ghz, there is 2GB of RAM, the HD's are SCSI RAID1, the NIC's are 100Tx Full Duplex. The usage details follow:
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Here is the memory usage:
free -t -m
total used free shared buffers cached
Mem: 2026 1496 529 0 140 1213
-/+ buffers/cache: 142 1883
Swap: 1983 0 1983
Total: 4010 1496 2513
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Here is the disk usage:
df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-Log
Vol00
133G 3.2G 123G 3% /
/dev/sda1 99M 47M 48M 50% /boot
none 1014M 0 1014M 0% /dev/shm
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Its worth noting that when you are talking on the phone the call quality is great, but when you call into the PBX from a Land Line or VoIP Line and the IVR plays the recorded sound files for the IVR menu's they sound "choppy", the sound is not so bad that you cant make out what its saying, but its bad enough to notice that something is wrong. As you can see from above the server usage is pretty low. Maximum concurrent calls is about 20 ULAW Channels. However the sound is bad even if there is just 1 call.
I am at a loss here for what else I can try and do, we have tried the recordings in different formats (IE: GSM, ULAW, WAV) - the sound is always having the same problem. I don't know what else to look for or what else I can try, but I would really like to get this sound problem fixed. If the server specs are good, usage is low, and sound files are professionally recorded, why do they sound so choppy?
Also I should mention the system is 100% VoIP, the channels are IAX.
I really need some ideas and options so I can troubleshoot and fix this problem. Here's hoping one of your expert brains can steer me in the right direction.
Thanks in Advance
