Sound choice (6)
I believe the answer is:
stereo
'sound choice' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for stereo that I've seen before include "Sound coming from different directions" , "System of sound reproduction" , "Three-dimensional sound effect, in short" , "When sound comes through two channels" , "Sound transmitted through two speakers" .)