phonograph recording vs audio

phonograph recording and audio both are nouns.

Word	Noun	Adjective	Verb	Adverb
phonograph recording	Yes	No	No	No
audio	Yes	No	No	No

As nouns, audio is a hypernym of phonograph recording; that is, audio is a word with a broader meaning than phonograph recording:

phonograph recording: sound recording consisting of a disk with a continuous groove; used to reproduce music by rotating while a phonograph needle tracks in the groove
audio: a recording of acoustic signals

Other hypernyms of phonograph recording include audio recording, sound recording.

phonograph recording (noun)	audio (noun)
sound recording consisting of a disk with a continuous groove; used to reproduce music by rotating while a phonograph needle tracks in the groove	the sound elements of television
	a recording of acoustic signals
	an audible acoustic wave frequency
	the audible part of a transmitted signal