How can third-party iOS apps obtain real-time waveform / spectrogram data for Apple Music tracks (similar to djay & other DJ apps)?

Hi everyone,

I’m working on an iOS MusicKit app that overlays a metronome on top of Apple Music playback, using ApplicationMusicPlayer. To line the clicks up perfectly I’d like access to low-level audio analysis data—ideally a waveform / spectrogram or beat grid—while the track is playing.

I’ve noticed that several approved DJ apps (e.g. djay, Serato, rekordbox) can already:

• Display detailed scrolling waveforms of Apple Music songs

• Scratch, loop or time-stretch those tracks in real time

That implies they receive decoded PCM frames or at least high-resolution analysis data from Apple Music under a special entitlement.

My questions:

1. Does MusicKit (or any public framework) expose real-time audio buffers, FFT bins, or beat markers for streaming Apple Music content?

2. If not, is there an Apple program or entitlement that developers can apply for—similar to the “DJ with Apple Music” initiative—to gain that deeper access?

3. Where can I find official documentation or a point of contact for this kind of request?

I’ve searched the docs and forums but only see standard MusicKit playback APIs, which don’t appear to expose raw audio for DRM-protected songs. Any guidance, links or insider tips on the proper application process would be hugely appreciated!

Thanks in advance.