to be honest, i've been playing violin for a number of years and my strategy is still to listen to a part of the song, rewind until i can play it (even if slowly), then write that down. some of the pieces i want to write down are twin-guitar pieces, where i need to (generally) choose the melodic guitar over the harmonic. i haven't found AI good at that, but, thinking now, i haven't tried it in years, so it may have gotten good enough? sorry for the lack of much insight, lol. (for metal, finding tabs online can at least help with the rhythm, so i just need to try and transcribe the notes & flourishes).