Oh! I've seen this one before a while ago! I failed using it for some iterations in the past, but I think that proves I might have been on the right track and just given up too early. Thanks for sparking my desire to try again!
For my project the important part was the array of beats and finding a way to detect input in a fraction of time around those beats. It helps to have your song in a DAW to see the percussion layer and base the point in bpm of beats around something on that layer. In the Space Walk level I used the snare. If you're composing your songs you need to be mindful of which instrument you're gonna base the input on, it's part of the level design.