Removes a synchronizer from a mixer source channel.
|handle||The channel handle.
|sync||Handle of the synchronizer to remove.
If successful, TRUE is returned, else FALSE is returned. Use BASS_ErrorGetCode to get the error code.
|BASS_ERROR_HANDLE||At least one of handle and sync is not valid.
This function can only remove syncs that were set via BASS_Mixer_ChannelSetSync, not those that were set via BASS_ChannelSetSync.