How to change music on hold volume?

Hi guys, how can I change or lower the volume of music on hold? Is there a configuration?
VICIDIAL astGUIclient discussion forum
http://www.vicidial.org/VICIDIALforum/
http://www.vicidial.org/VICIDIALforum/viewtopic.php?f=4&t=41224
carpenox wrote:You would have to do that before you uploaded it
dhijrwn wrote:Hi guys, how can I change or lower the volume of music on hold? Is there a configuration?
sox -v 0.9 in.wav out.wav