Something I would very much like to see in all music software, including this one, is an alternative for keyboard-based note entry and preview that is not based on the piano, but on the guitar/bass. Basically, each keyboard key is a semitone over the one on its left, and keys ZAQ1 are mapped to notes EAGD (when in QWERTY). It's very simple to do and I find it much easier to work that way, because it makes it very easy to play melodies and find note relationships the way you would on a guitar fretboard. No guessing where the black keys lie, most things are transpositionally invariant. I've made this into a macOS app and after more than 6 years using it, I find it vastly superior and much more adapted to the limitations of a computer keyboard. The fact the keyboard lines are staggered is annoying at first, but I've been quickly able to get over it. I guess all guitar players would find that useful as well.