Both were asked for in #367 "for later". The node of a Parametric EQ
now shows its curve in small, and its tab shows what passes the node
while it is seen.
#375, the curve in the node:
- NodeDef has an optional `picture`: a height, and shapes made from
the settings as plain point lists (guide, area, line). It is
general, the Parametric EQ is its first user.
- NodeView draws it in a box below the rows, again only when the box
or the settings change. A drag in the EQ tab changes them, so the
node follows it live.
- Without a band the box stays, flat on its 0 dB line, so the node
does not grow at the first band.
- The axes of the curve, `eqCurvePoints` and `fillShapes` move from
editor/soundfx/eqView to core/soundfx/parametricEq. Tab and node
draw the sum from the same function.
#374, the spectrum:
- A node marked `tapped` gets a `tap` stage in front of its own
stages and one behind them when compiled, in a sound FX and in an
instrument alike. Its id is asset and node, since a copied asset
keeps its node ids.
- A tap is a gain of 1. SpectrumTaps (new, viewport/spectrum.ts)
holds the tap of every voice and bus while it plays.
- While the EQ tab is seen, in the tab row or in a window, the taps
of that node feed one analyser per side (8192 points). Nothing is
made before a tap of the node plays, so no AudioContext is opened
early.
- The tab draws both behind the curve, on a scale of 0 to -96 dBFS:
the sound coming in faint and grey, the sound going on in the
colour of a sound port. The analyser smooths it, and once the
sound has gone the sum still hands it silence, so it falls away.
- Once the tab is not seen, Editor.tick lets the analysers go, like
the meters of the Song tab.
- A tap does nothing to the sound, so `stats().last.stages` leaves it
out, and a bypassed EQ keeps its taps.
Decided on my own:
- Every sound passing the node counts: Play of the sound FX tab, an
instrument's keys, a song, a run. The issue proposed that.
- The spectrum has no labels of its own. Its scale is in the wiki.
Tests:
Gate (melektaus-atx) 275 files, 4247 tests (11 new), EXIT 0
e2e 34 (melektaus-atx) ALL PASSED, 98 checks (2 new), twice
Counter-checks, each put back by copy and compared with cmp:
- The node's curve drawn without its bands: 2 unit tests fail.
- The spectrum without the loudest bin between two points: 1 fails.
- SpectrumTaps.stop leaving the taps linked: 1 fails.
- Taps that never feed the analyser: e2e 34 fails in exactly the
spectrum check (frames 0). Run in the container only.
The screenshots of the second run were looked at: the blip as one
peak behind the curve, and the dip at 4 kHz in the node.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
