linear STFT's window length in time domain = k (constant)

CQT's window length in time domain = k/f

showcqt-js window length in time domain = a * b / (a / c + b * f / (1 - c)) + a * b / (b * f / c + a / (1 - c))

whera a = 384, b = 0.33, c = 0.17

I also apply asymmetric window to reduce latency before doing VQT.

> I think having an autocorrelation option on the visualization could be cool, as it could reduce the spikes from the overtones (and also show a missing fundamental). But I think you'd need a different convolution for each instrument.

Research needed. Doing autocorrelation on simple single instrument monophonic audio is probably easy. But doing it on complex multi instrument audio isn't easy. Probably, it needs some sort of machine learning.