For context, I'm not transcribing to distribute sheet music or anything, although I'm sure you could. I write down just enough when transcribing so I don't forget what I just figured out. I do it to practice my ear and learn songs.

That said, it's the fastest way to get a track into some player, define loop points easily, and then write down what I need to along with the player. I can jot down chords, lyrics, tabs of riffs, etc. I've tried tons of solutions over the years like sooperlooper, ableton live, reaper, winamp, youtube. this is by far the easiest, with just the right set of tools. It also doesn't do any of it automatically, so there's not even a temptation to skip practicing my ear.