You can get much more power with strategy, but I just gave the player a lot of lee-way time for power gain (a lot). But perfect time will give you around a ~6 multiplier. You still will get a multiplier even if your playing is subpar but fast though, since an "okay time multiplier" I gave lots of extra time for the player to be able to get. It counts every 48th note at 90bpm, but the length for an okay time I think is longer than 48th note. Means you can gain power without being good.
Could have set it up to care more for precision, but that's for some other time