The 3 Region Types in Logic Pro X
An audio region can be your own audio recording, an audio Apple loop, or an imported audio file.
Audio regions can be only audio tracks. You can identify an audio region by its audio waveforms.
Audio regions contain references to audio files. An audio region isn’t the file itself, and this is important to remember. If you split an audio region in half, for example, the audio file isn’t split in half. And if you delete a portion of an audio region, the audio file isn’t deleted — it simply isn’t referenced by the region any more.
If you want to get that portion of audio back, all you have to do is drag the edge of the region.
A MIDI region contains MIDI data. MIDI regions can be used on software instrument tracks or external MIDI tracks.
You can identify MIDI regions by their thin rectangle note events.
MIDI regions are more flexible than audio. You can definitely manipulate audio beyond recognition, but you can’t remove a single note from an audio file and put it on its own track, as you can with MIDI. MIDI regions allow you to experiment and compose with complete freedom.
A drummer region can appear only on a drummer track.
Drummer regions are like a MIDI-audio hybrid region. They look like audio but they contain MIDI data. The difference between a drummer region and a MIDI region is that you can’t edit the MIDI data directly on a drummer region. You have to use the drummer editor to edit the drummer region.
However, after you’re happy with how a drummer region sounds, you can export the region as MIDI to edit in a MIDI editor.
Drummer regions don’t allow MIDI input from an external MIDI controller. The drummer editor controls the contents of a drummer region. Think of these regions as virtual drummers. Drummer is great for songwriting.