In addition to having a company name that’s a lot of fun, SuperMegaUltraGroovy also has a really cool app called Capo ($30). It’s one of those things that kind of sounds like magic, but actually works. Capo takes the music in your iTunes library, analyzes it, and spits out guitar tablature. No more having to buy tab books or figure out the chords yourself; the app does it for you.
Using a spectrogram, Capo is able to take the audio and turn it into notes. Not only does it give you the chords — it also details bends, slurs, and vibrato. While it’s not a replacement for learning music theory, it’s a great way to pick up songs quickly. The app has just been updated with new chord detection technology, and iCloud support, which keeps the desktop and mobile versions in sync.