Glossary for Electronic Musical Instruments : Yamaha Manual Library

Control Change message defined in XG. Numbers (0 through 95) can be assigned to AC2 as Control Numbers. In XG, Multi Part parameter change is defined to allow the AC2 to control the following six parameters.
- Pitch
- Filter
- Amplitude
- LFO Pitch Modulation Depth
- LFO Filter Modulation Depth
- LFO Amplitude Modulation Depth

For example, Filter can be controlled via a breath controller by setting AC2 to "2". Assigning the Control Number to AC2 is determined by AC2 Controller Number (System Exclusive Message).