Designing FIR taps: a window, a cutoff, and the bits you keep

Set taps, cutoff, window and coefficient bits. Watch the integer taps and the response: a better window deepens the stopband, too few bits fill it back in.

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Where the numbers come from

gHashTag/t27 specs/fpga/dsp/signals.t27 (t27#8985): every value on the page is its fn bodies, compiled to wasm (logic.js)
R. G. Lyons, Understanding Digital Signal Processing, 3rd ed., ch. 5: finite impulse response filters
F. J. Harris, On the use of windows for harmonic analysis with the discrete Fourier transform, Proc. IEEE 66(1), 1978: Hamming and Blackman

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