After a customized Music on Hold (MoH) file is installed on Cisco CallManager Express, when the caller is put on hold, the held caller hears loud and garbled music.
In order to resolve this issue, make sure the file format is correct. If the file format is 128 KB 16-bit then the MoH music is garbled. Change the format to 64 KB 8-bit.
Refer to moh (telephony-service) for more information.
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Download Audacity ( google it)
Change Project to 8000hz (lower left hand corner)
Go to edit and then preferences
Change Uncompressed export format to “ AU (Sun/Next 8:bit ULAW)”
Load audio file
Select a space where someone is not speaking
Go to effect and noise removal
Click get noise profile
Choose effect and noise removal
Click remove noise
Choose effect and then normalize
Choose effect and then compressor
Change threshold to -42db
Change ration to 10:1
Choose export as au.
Save as “ filename.au”
Upload file to router via tftp
specify the file in CME GUI