Using a playback loop has a few benefits. First, it saves time. You don’t have to copy and paste your one bar of drum notes many times to get the effect you want. Secondly, it saves memory in the computer. It takes less space to store one bar of notes with the directions to repeat those notes ten times than it does to store ten identical copies of the notes. Thirdly, it’s convenient to edit. When you change a note that is part of a playback loop, the note will change for all repeats of the note as well.
