audio
au‧di‧o1 /ˈɔːdiəʊ $ ˈɒːdioʊ/ 
adjective [only before noun]
audio and video equipment
audio2 noun [uncountable]
the part of a recording that contains sounds and music but not pictures:
You can save the audio for editing later.
| I |
adjective [only before noun] Date: 1900-2000
Origin: audio- 'of hearing', from Latin audire 'to listen'
relating to sound that is recorded or broadcast:Origin: audio- 'of hearing', from Latin audire 'to listen'
| II |
noun [uncountable]the part of a recording that contains sounds and music but not pictures: