Very nice! Extracting the guitar track would be awesome but it’s so much hardier than drums. Even cymbals are hard. And guitars have chords and distortion and…
Yeah, that's why my idea was to use neural nets trained on manually labeled data, instead of relying solely on pitch detection.
Also, probably AIs nowadays can help a lot with generating training data, and even improving detection.
That being said, even SOTA voice recognition has only like 95% accuracy, so it gets wrong 1 in 20 words. Imagine if transcribing a melody and 1 in 20 notes are wrong, for a fast melody that would mean a wrong note every few bars.