Retrieves the mixer that a channel is plugged into.
|handle||The channel handle.
If successful, the mixer stream's handle is returned, else 0 is returned. Use BASS_ErrorGetCode to get the error code.
|BASS_ERROR_HANDLE||The channel is not plugged into a mixer.
BASS_Mixer_StreamAddChannel, BASS_Mixer_StreamAddChannelEx, BASS_Mixer_StreamGetChannels