au·di·o 
(ôdē-ō′)
(ôdē-ō′)adj.
1. Of or relating to recorded, transmitted, or reproduced sound.
2. Of or relating to humanly audible sound.
n. pl. au·di·os
1. Recorded or reproduced sound.
2. Audible sound.
3. A sound signal or recording.
4. The part of television or movie equipment that has to do with sound.
[From AUDIO-.]