We have a UCCX 7 system which holds many IVR prompts, lately we added a new audio prompt to be played if users are waiting in the queue of the IVR.
The prompt is being played normally but at some points of the prompt the sound is a little distorted, it is a music ad, and when the music gets high the sound is some how distored which is not accepted by our management.
The file specifications are like the rest of the prompts which is::
1. Bit Rate= 64kbps
2. Audio sample size= 8 bit
3. Channels = 1 (mono)
4. Audio sample rate = 8khz
5. Audio format = u-law
The codecs of the prompts is G.711.
Apreciate any assistance please, thanks a lot.
No, if you run G729 you will get poor quality music. It's just a function of the way that G729 works.
The option you mentioned makes UCCX run G729 prompts natively - if all communications to/from the UCCX server need to run G729, there's no point sending them out at g711 and having to transcode everyting. Conversely if you mainly use G711, you would have UCCX run G711 prompts so that you don't lose audio quality for no good reason.
If you need good quality, then you can do one of these two things IF your music is just played in between the prompts. If you have prompts created with background music embedded in it then you can't do this:
1) stream the music as G711 from CallManager by ensuring the MoH server is in a region that allows g711 between it and your PSTN gateways on the remote site
2) stream the music as G711 from the local gateway using multicast; there are lots of references on how to do this on this forum and on cisco.com.
If you have background music mixed in with the voice in your prompts, and you need good quality then your only real option is to stop using G729, or start again with voice-only prompts and an MoH solution as suggested above.
Please rate helpful posts and mark answered questions that you've got a satisfactory response from to help identify useful content in the forums...
Can you describe a little more about which parts of the prompt are being distorted?
Another possibility is that if your media stream is being put through a transcoder - i.e. the server is running G711, but being trancoded intentionally or not on the way to your gateway/phone. G729 is designed to compress voice, so if you run music through it it ALWAYS sounds terrible.
If you have music that sounds bad, and voice that sounds OK, then that could be your problem. Try verifying what codec is actaully in use (e.g. from your desk phone you can press ? twice quickly to see which codec is in use when a call is active).