When you record audio, you’re capturing the sounds of an actual sound, generated by an instrument or equipment. In contrast, the MIDI data is simply information sent to a computer, so you’re not recording actual sounds. Advantages of MIDI files is that they’re easy to edit and add or remove effects. A drawback is that it’s not the solution to add dialogue or singing to a track, which is possible with recording normal digital audio files. But note that digital audio files are often bigger than MIDI files, so you’ll need more storage space.