MIDI vs communications protocol

MIDI and communications protocol both are nouns.

Word	Noun	Adjective	Verb	Adverb
MIDI	Yes	No	No	No
communications protocol	Yes	No	No	No

As nouns, communications protocol is a hypernym of MIDI; that is, communications protocol is a word with a broader meaning than MIDI:

MIDI: a standard protocol for communication between electronic musical instruments and computers
communications protocol: (computer science) rules determining the format and transmission of data

Other hypernyms of MIDI include protocol.

MIDI (noun)	communications protocol (noun)
a standard protocol for communication between electronic musical instruments and computers	(computer science) rules determining the format and transmission of data