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Add TILT spectral-tilt knob plus grid zoom/fade and curving controls

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- TILT knob (-1..1, 0=flat) boosts highs / cuts lows about the log-frequency
  centre so high frequencies become more visible in the display
- Add GRID ZOOM, GRID FADE, and CURVING knobs; refine BARS/LEDS snapping
- Fix README MODE knob placement description
This commit is contained in:
Armin 2026-08-14 02:55:28 +02:00
commit ca9555af13
7 changed files with 176 additions and 15 deletions
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9
Source/Analyser.cpp
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@ -95,7 +95,14 @@ void Analyser::computeFFT()
// to ~full scale, otherwise the raw magnitudes sit ~66 dB too hot.
const double normalized = avg / static_cast<double> (fftSize);
const double db = 20.0 * std::log10 (normalized + 1e-9);
double norm = (db - minDb) / (maxDb - minDb);
// Spectral tilt: boost highs / cut lows (or the reverse) about the
// logarithmic centre of the spectrum. The per-band fraction spans
// 0 (lowest band) to 1 (highest band), so (frac - 0.5) * 2 is -1..+1.
const double frac = (static_cast<double> (b) + 0.5) / numBands;
const double tiltDb = tilt * (frac - 0.5) * 2.0 * maxTiltDb;
double norm = (db + tiltDb - minDb) / (maxDb - minDb);
norm = juce::jlimit (0.0, 1.0, norm);
targets[b] = static_cast<float> (norm);