Sets the global music/sample/stream volume levels.

void WINAPI BASS_SetGlobalVolumes(     int musvol,     int samvol,     int strvol );

Parameters

musvol	MOD music global volume level... 0 (silent) - 100 (max), -1 = leave current.
samvol	Sample global volume level... 0 (silent) - 100 (max), -1 = leave current.
strvol	Stream global volume level... 0 (silent) - 100 (max), -1 = leave current.

Remarks
This function allows you to have control over the volume levels of all the MOD musics, samples and streams, which is useful for setup options (eg. seperate music and fx volume controls).

A channel's final volume = channel volume * global volume / 100. So, for example, if a stream channel's volume is 50 and the global stream volume is 80, then effectively the stream's volume level is 40 (50 * 80 / 100 = 40).

See also
BASS_GetGlobalVolumes, BASS_ChannelSetAttributes