[Dynam0]

Originally Posted by Arch0wl

what do you mean by this?

You're implying that by vibrating your one hand onto 4 keys at once at 12 "NPS" that the effect is additive and you are actually vibrating at 48 NPS. While you are technically making that many inputs, I don't think that is a useful quantifier of your vibration speed because we should actually be looking at the number of distinct motions you need to make; that being 12 NPS.

It's like arguing that a car traveling at 100km/h is really traveling at 400km/h because each wheel is traveling at 100km/h...it isn't a good representation.

I made a post regarding 4-key technique a while ago where it's simply broken down into two elementary techniques: repeated notes on one finger and alternating between both fingers (trilling).

*goes to dig up post*

Originally Posted by Dynam0

...Speed has been derived from fast execution of patterns in a variety of forms; streams, jacks, trills, jumpgluts, jumpstream, handstream, etc. Really though, there are only two basic motions that define finger speed: Alternating notes on one hand (one handed trilling), and repeating notes on one hand (jacking). The combination of those two motions on one hand and performing them in concert with both hands simultaneously defines overall speed. Finger speed in addition to coordination is what gives raw speed in StepMania.

I think it best to:

1) Quantify jack speed on a one-finger basis for different time durations on both hands.
2) Quantify one-hand trill speed for different time durations on each hands.
3) Use data from 1) on it's own to quantify jack speeds, jacking is a very distinct motion that doesn't really lend itself to pattern manipulation.
4) Take the sum of the results of each hand from 2) to get a theoretical max NPS that is independent of pattern manipulating (this is someone's true max NPS).