Setting the voltages to ±3v will stop your oct 0 and oct 8 while maintaining oct 1 to oct 7 range playing a note outside the ±3v range, such as E0, will still set to the min or max of that range i.e. E0 -3v
Setting the voltages to ±3v will stop your oct 0 and oct 8 while maintaining oct 1 to oct 7 range playing a note outside the ±3v range, such as E0, will still set to the min or max of that range i.e. E0 -3v