27.4. Enhance Timing, Enhance Tuning

As you've surely figured out by now, the two kinds of music that GarageBand processes—MIDI data and digital audio—have very different characteristics. The beauty of MIDI data is that you can edit the recorded notes as though they're typed text in a word processor. Type in new notes, delete others, shift their timing, fix wrong notes.

None of this is possible with digital recordings, which are simply frozen snapshots of a live performance.