Hello!
Audio via UTP of course why not.
But you need a impedance transformers 120 OHm to 600 OHM.
Signal can't exceed 1 V pp. S¹ it can be a standard 0dB signals.
It can be typical microphone transformers.
You need 4 of in and 4 on out. You can transform asymetrical signals to symetrical (one on the pair) and on other end convert to asymetrical.
Crosstalk in this situation will 60 dB. s¹ lets try.

I transmit signal on 305 meters without noise.