digital audiotape vs audiotape

digital audiotape and audiotape both are nouns.

Word	Noun	Adjective	Verb	Adverb
digital audiotape	Yes	No	No	No
audiotape	Yes	No	No	No

As nouns, audiotape is a hypernym of digital audiotape; that is, audiotape is a word with a broader meaning than digital audiotape:

digital audiotape (noun)	audiotape (noun)
a digital tape recording of sound	magnetic tape for use in recording sound
	a tape recording of sound