Simliar to this stackoveflow post: getting pcm audio for visualization via Spotify iOS SDK
I am looking to add an AudioUnit callback on the destination node as suggested by a Spotify developer in the post above.
However, I am unable to figure out how to get the AudioUnit from the destination node. I have been researching Core Audio and its documentation; however, it is not clear as to how to get a reference to the audio unit in an existing AUNode.
Any help would be appreciated! My ultimate goal is to create a reactive type of UI based on the power level from the audio stream.
