- https://www.reddit.com/r/musictheory/ used to have a lot of rabbit holes that were fascinating, but not sure what the community is like now. From a quick look it could still be a useful place to lurk.
- The Youtube channels 12tone, Sideways, 8-Bit Music Theory and Nahre Sol are my go-tos now that I'm no longer in active learning mode. Music Matters, Adam Neely and Signals Music Studio are also good. There are others in the Youtube sphere too but those are the channels I'm most familiar with.
- Music composition videos and classes also tend to be fairly theory-heavy without advertising it overtly.
- https://www.musictheory.net/ is surprisingly good for the basics; their apps are good quality.
- https://www.reddit.com/r/musictheory/ used to have a lot of rabbit holes that were fascinating, but not sure what the community is like now. From a quick look it could still be a useful place to lurk.
- The Youtube channels 12tone, Sideways, 8-Bit Music Theory and Nahre Sol are my go-tos now that I'm no longer in active learning mode. Music Matters, Adam Neely and Signals Music Studio are also good. There are others in the Youtube sphere too but those are the channels I'm most familiar with.
- Music composition videos and classes also tend to be fairly theory-heavy without advertising it overtly.