Right note upset acoustic device (6)

I believe the answer is:

reverb

I'm a little stuck... Click here to teach me more about this clue!

'acoustic device' is the definition.
'reverb' can be an answer for 'device' (I have seen 'Electronic device' mean 'reverb' so perhaps 'device' could also mean 'reverb'). I'm not certain of the 'acoustic' bit.

'right note upset' is the wordplay.
'right' becomes 'r' (common abbreviation).
'note' becomes 'breve' (musical note).
'upset' shows that the letters should be reversed in order.
'breve' back-to-front is 'everb'.
'r'+'everb'='REVERB'

Can you help me to learn more?

(Other definitions for reverb that I've seen before include "Electronic device" , "Device creating artificial acoustics" , "device in recording studio" , "Echo in music" , "Echoing effect" .)

I've seen this clue in The Guardian.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.