Spectrogram
ui.audio.Spectrogram(magnitudes=engine.spectrum(512), history=160, colors="magma")Every render that receives a new magnitudes list adds a column on the right; redrawing for
any other reason (a hover, another widget) does not, so the speed follows your updates. It keeps
the last history columns.
Loudness is quantized into levels colors and every cell of one color is drawn in a single
shape, so even 160 columns × 64 bands stay cheap to draw.
| Property | Default | What it does |
|---|---|---|
magnitudes |
() |
dB per frequency bin (like node.spectrum()). |
width, height |
360, 140 |
Size in pixels. |
history |
120 |
Columns kept. |
bands |
48 |
Rows (log-spaced bands). |
min_db, max_db |
-90, 0 |
Range of the colors. |
colors, levels |
"magma", 24 |
Palette and how many color steps. |
sample_rate, spacing |
48000, "log" |
Like Spectrum: how the bins are spaced. |