The whole complex spectrum

Most spectrum plots throw the phase away. This one keeps it — hue is phase, height is magnitude. Every transform below runs algofft compiled to WebAssembly, in this tab.

Initializing WASM…

n — window — algorithm — transform — round-trip —

Signal

Waveform

Tone A 6

Tone B 20

Noise 0.08

Animate phase

Transform

FFT size

Arbitrary n

Strategy

Precision

Window

Analysis

Magnitude

Frequency

2D grid

Convolution kernel

Waveform

Time domain snapshot, windowed before transform.

Reconstruction

Inverse of the forward transform, overlaid on the source signal.

round-trip error —

2D frequency map

FFT of a generated spatial texture. Hue is phase, lightness is log magnitude.

Convolution / correlation

FFT-based convolution against a naive O(N·M) reference.