(1) A facility provided on some sequencers to allow a track to be fractionally delayed or advanced relative to others. Particularly useful for synthesizer voices which speak late, or to give a part a sense of urgency by being played very slightly ahead of the beat. Also called MIDI offset.
(2) Noticeable delay in the transmission caused by MIDI Choke. This usually happens when too many MIDI devices try to send bulk dumps or unthinned continuous controller data over the same MIDI port.