I am building a device that helps me - and hopefully others - learn how to play a brass instrument. When picking up the tenor horn I started by making flashcards. On one side there was the note, and on the other side the fingering was shown. But this was a cumbersome way to learn, and I wanted faster iteration to get this into muscle memory. So - to procrastinate - I made a device with speakers, microphone and a small lcd screen. It is currently showing the notes and fingering automatically. But I am implementing a fast fourier transform to pick up what note I am playing to show whether it's the correct one or not. FFT for a brass instrument is not straight forward as there are many frequencies being played, but I think by tuning it - it would be a very fast and gamified way to learn an instrument compared to playing scores.