Audio driver

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How can I stop the phone program cprog.exe from grabbing my audio control ? for eg. If IU am playing a mp3, & I receive a phone call then my mp3 player stops.
Can I use a sound mixer functions to stop this ?
-SMO

:shock:
I also want to know how to solve this problem.
it seems there are two audio device in XDAII,
one is waveform device, provide sound service for multimedia applications, or sth. like this. another is GSM audio device.
I dont know detail about GSM audio device. And I want to know what is it? how to change its volume in program?
Thanks in advance!!!

I also want to know, sometimes during a call, I want to play some MP3 sound to let the other party hear it,, but unfortunately, Windows mutes all output sounds when a call is in progress

Is there any solution for this?