This app/services is useful for working out parts of songs. You upload an audio file, leave it to process for a minute and you get a dashboard with separate tracks for each instrument. From there you can playback with, say, all instruments’ volume down, except guitar to home in on the solo. It’s much easier to hear what’s going on. You can slow down and export sections to new audio files. When I’ve done this, I’ve replayed short chunks in QuickTime on repeating loops. moises.ai