i'll share my Invention history:I learned Inventions 1,4,8 and 13 many many years ago. It's been so long, I basically have to sight read them to play them now. Currently, i'm sight reading Inventions 1,2,4 at a very slow pace (25,15,22 bpm) ~ that's average pace, not minimum pace.Recently, I've been spending some time remastering Invention 13. After 5 hours, I'm currently playing at 34 bpm (avg tempo, not min), up from 23 bpm. I've still got a ways to go until I reach my target of about 75 bpm.I'm just wondering how many and which ones have you learned? what tempo can you play each of them at? (without too many mistakes)And how much time have you spent on learning each one?
What do you mean by "learned"? I've play through the whole WTC, Inventions, Arts of Fugue, for so many years (or decades) that I "know" them all inside out. Honestly, with these types of work, you quickly reach a point where the distinction between having 'learned' a work and reading it through ceases to exist.