When recording MIDI, or when manually entering MIDI notes, the beginning and ending of resulting MIDI clips are constrained to bar boundaries. This facilitates arranging MIDI clips in a musically meaningful way, in whole bar lengths.

The beginning of a recorded MIDI clip always starts on the barline immediately before the first MIDI note (Note On) of the clip. Likewise, the MIDI clip ends on the barline immediately following the last note (Note Off) of the clip.