Currently, you can only use multiple voices for the Drum Staff. Please add that to the Piano at a minimum. It would also be useful on the instrument section staves (Violas, Flutes) as those quite often have a first and second part.

As it stands you cannot input the majority of Bach pieces. The current work-around is to write the notes on the Drum Staff then copy and paste to the instrument you want. Playback and notation seems to work fine on the new staff so we know the other staves can take it.