SynthMaker 1.0 (179)

Response: wire a filter (or a module you wrote in code) into an Analyzer and see its gain and phase across the spectrum, exact, moving as you turn its knobs.

Impulse: the module's answer to a single click, over 64, 512 or 4096 samples.

Poles: its poles and zeros on the unit circle.

Scope: Note holds each note's start, 1 cycle shows one period, Freeze stops the picture, and Compare draws another Analyzer's trace on top.

Spectrum options: window, size, axis, level, peaks, phase, and the harmonics of the last key you played.

Delay line: its samples knob reads Off, 1 sample, or the number of samples.