This is how this project started! I thought I was super smart figuring out I could do that, then I realized there are many apps that already do the same thing. Eventually I decided to see if I could find a novel, more user-friendly approach that doesn't require you to put a thousand-dollars phone on a fast moving spinning thingie, and that's how Grooved came to be.

Here I was thinking it'd be smart to have the app use the camera to figure out how fast the middle label is spinning around but this seems way simpler now that you mention it.