Availability of Audio Features and Audio Analysis on Tracks in Spotify API

[cmar]

Hello everyone,

I've been working with the Spotify API and I've encountered an issue where I'm consistently receiving `None` for all audio features and audio analysis for tracks. I'm wondering if anyone else has experienced this issue?

Is the availability of audio features and audio analysis for tracks a common feature in the Spotify API? If so, are there any specific conditions or requirements for these features to be available? For instance, are they only available for certain tracks or regions, or do they require specific API permissions?

Any insights or advice would be greatly appreciated. Thanks in advance!