Cops in here to adjust sound quality (12)

I believe the answer is:

stereophonic

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'sound quality' is the definition.
'stereophonic' can be an answer for 'sound' (I've seen this before). I am not certain of the 'quality' bit.

'cops in here to adjust' is the wordplay.
'adjust' indicates an anagram.
'cops'+'in'+'here'+'to'='copsinhereto'
'copsinhereto' with letters rearranged gives 'STEREOPHONIC'.

Can you help me to learn more?

(Other definitions for stereophonic that I've seen before include "Combining separate sources of sound" , "through two channels" , "(Of sound) multi-channel" .)

I've seen this clue in the Sydney Morning Herald.

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