| | MixingMatrix: Multiply input channel... | 
 | 
Multiply an input channel of the selected MixingMatrix by a value.
Examples
- Increase the contribution of input channel 1 in each output channel by a factor of 2
   Multiply input channel: 1, 2
- Remove the contribution of channel 1 in each output channel
   Multiply input channel: 1, 0
	© djmw 20170908