Detect Audio Presence on Real iPhone Device?

Hello all,
I have been having a hard time finding resources on this, so perhaps this a better place! Thanks in advance.

I am writing an automated test suite for a Radio App my company has. Is there a way to programmatically detect audio playback coming from the phone?

A rather complex answer would be to use soundflower to change my phone output to my desktop input, and then analyze a recording with PyAudio or something similar. I don’t really need any more information besides a 1 for playing or a 0 for silence. Has anyone worked through this problem and has valuable advice?

Using Python 2.7 and Appium-Python-Client 0.39
Additionally using Pytest 4.3 and Allure-Pytest 2.6.1

Thank you all!