audio vs audio recording

audio and audio recording both are nouns.

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

As nouns, audio and audio recording are synonyms defined as:

Other synonyms of audio include sound recording.

audio (noun)	audio recording (noun)
the sound elements of television	a recording of acoustic signals
a recording of acoustic signals
an audible acoustic wave frequency
the audible part of a transmitted signal