【66-70】midi enables people to use （66） computers and electronic musical instruments . thereareactuallythree components to midi， the communications " （67） "， the hardware interface and a distribution（68） called "standard midi files". in the context of the www， the most interesting componentisthe （69） format. in principle， midi files contain sequences of midi protocol messages.however，when midi protocol （70） are stored in midi files， the events are also time-stamped forplaybackin the proper sequence. music delivered by midi files is the most common use of miditoday.
