Here is a list of the MIDI channel assignments for the GW-7 parts.
| MIDI Channel | Keyboard Part |
| 1 | Arranger 1 |
| 2 | Arranger Bass |
| 3 | Arranger 2 |
| 4 | Keyboard Single mode |
| 5 | Arranger 3 |
| 6 | Keyboard Dual mode, Lower |
| 7 | Arranger 4 |
| 8 | Arranger 5 |
| 9 | Arranger 6 |
| 10 | Arranger Drums |
| 11 | Keyboard Split mode, Lower |