Topic Last Modified: 2010-11-08

The Call Park application supports only Windows Media audio (.wma) files for music on hold. You can use the Microsoft Expression Encoder 4 to customize files for music on hold. To download Expression Encoder 4, see Use the tool to convert the file to a .wma format. The recommended format for Call Park music-on-hold files is Media Audio 9, 44 kHz, 16 bits, Mono, CBR, 32 kbps.

The converted file plays over the phone only at 16 kHz, even if it was recorded at 44 kHz.