This would be both from the harmony groups in the band and also the harmonizers for the lead instrument.
That way we could have for example a three note chord of guitars, flutes, cellos, or whatever playing the available patterns.
Additionally for the lead harmonizers, to have for instance a flute as the main instrument with an oboe as the 1 note harmonizer (two note, and chord tone options as well)
That’s an interesting idea. I’m not sure we can do this at the moment as our band browser doesn’t allow adding options to an instrument at the moment, but it would be great to have this feature.
Perhaps we could also put the octave slider in a continuous mode and create one note harmonies for all values other than 0, 12 and -12. I have to think about that.
Regards!
Dennis
You could do it at the top level of the add instrument action on the band. Instead of just [Lead, Harmony, Bass, Drums] It could be [Lead, Lead Harmony, Harmony Rhythm, Bass, Drums]
Then it could use the existing system to set the range of the instrument and use the same octave slider.
A long range idea could be to create an additional sister product reusing the codebase. It’s not pertinent here but we could have that discussion elsewhere.
I’m not sure if this is important enough to be a separate category. Could be a bit confusing to have this extra as you would also have to define Lead1-4 again there.
Why would we need an additional sister product?
Basically, it would be the same code, just with a different presentation. You could keep the current style of chords and keys, tempo and such. It would just lack the band section because that would be fixed.
Each instrument section would have it’s own separate piano roll. You wouldn’t have to show all the piano rolls at once. They could collapse and show a miniature version of the piano rolls for the ones that are not being edited.
Select a section and bring up a piano roll for just that instrument section. For instance select strings and show the piano roll for violins 1, violins 2, violas, cellos, and basses. Select woodwinds and it would show flutes, oboes, clarinets, and bassoons. Select brass and show trumpets, french horns, trombones, and tubas. You could add a separate piano roll for each tuned percussion (harp, piano, marimba, xylophone, celeste, timpani) and untuned percussion.
Basically like a DAW but click on the track and it would expand to show your style of piano roll in place instead of a separate window like DAWs present.
In fact, I could see this being a better presentation for HookPad in general. The real strength of HookPad is the chords and progression building along with your implementation of the piano roll with color representation of the notes.
It would be a lot more flexible if instead of the fixed generic patterns, harmony instruments could have a separate piano roll to create your own. It would not have absolute notes but only relative scale degree. You could select a stock pattern to populate it but then, once populated, you could adjust it to suit.
one thing i’d like, is to allow polyphonic instruments to create chords in the melody section so i don’t have to construct them across voices and then merge in my DAW later. so for example, if the melody instrument is piano, i could create chords (say up to 6 notes), but violin would be single notes only. this way when i want to insert a custom chord into a piano part, and the usually tools for creating aren’t quite there 
then i would pop in that chord-with-no-name without having to do a whole bunch of things with multiple voices, section/band splitting etc.
this might be simpler to implement rather than separate piano rolls… just leverage the existing 4 leads but enable polyphonic…