Chooses what VOICE offers its' registers for access between IO addresses 0x50..0x5F.
u8 in IO at 0x41 called VOICEBANKREG
76543210
xxxxxVVV
V: RW Voice# (0..7)
| Name | Value | Comment |
| VB_Voice0 | 0 | |
| VB_Voice1 | 1 | |
| VB_Voice2 | 2 | |
| VB_Voice3 | 3 | |
| VB_Voice4 | 4 | |
| VB_Voice5 | 5 | |
| VB_Voice6 | 6 | |
| VB_Voice7 | 7 |