Complete Gelyk EQ plugin (dark/cyber/neon, scaling UI, git status bar)

This commit is contained in:
Gelyk 2026-08-29 13:26:26 +02:00
commit 580fcf7fec
7 changed files with 145 additions and 113 deletions

2
.gitignore vendored Normal file
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@ -0,0 +1,2 @@
build/
.DS_Store

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@ -3,7 +3,7 @@ cmake_minimum_required(VERSION 3.15)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
project(GelykEQ VERSION 1.0.0 LANGUAGES CXX)
project(GelykEQ VERSION 1.0.0 LANGUAGES C CXX)
if(NOT DEFINED JUCE_ROOT)
include(FetchContent)
@ -98,6 +98,10 @@ target_include_directories(GelykEQ
PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/Source
)
target_link_libraries(GelykEQ PRIVATE juce::juce_dsp)
target_compile_definitions(GelykEQ PRIVATE JUCE_MODULE_AVAILABLE_juce_dsp=1)
target_compile_definitions(GelykEQ PRIVATE
JucePlugin_Build_VST=1
JucePlugin_Build_AU=1

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@ -1,21 +1,42 @@
BUILD_DIR := build
# Standard macOS user plugin folders.
AU_DIR := $(HOME)/Library/Audio/Plug-Ins/Components
VST3_DIR := $(HOME)/Library/Audio/Plug-Ins/VST3
PLUGIN := "$(BUILD_DIR)/GelykEQ_artefacts/Release/AU/Gelyk EQ.component"
VST3PLUG := "$(BUILD_DIR)/GelykEQ_artefacts/Release/VST3/Gelyk EQ.vst3"
J = $(shell sysctl -n hw.ncpu)
all: build
# Configure + build with CMake (default make).
build: cmake-configure
cmake --build $(BUILD_DIR) --config Release -j$(shell sysctl -n hw.ncpu)
cmake --build $(BUILD_DIR) --config Release -j$(J)
cmake-configure:
cmake -S . -B $(BUILD_DIR) -DCMAKE_BUILD_TYPE=Release
# Fully install the plugin into the macOS user plugin folders, then
# refresh the system so the host (AudioUnit/VST3.scan) picks it up.
install: build
cmake --install $(BUILD_DIR)
# Install directly to the standard macOS user plugin folders (AU + VST3).
install-local: build
cmake --install $(BUILD_DIR) --prefix "$(HOME)"
rm -rf "$(AU_DIR)/Gelyk EQ.component" "$(VST3_DIR)/Gelyk EQ.vst3"
mkdir -p "$(AU_DIR)" "$(VST3_DIR)"
cp -R $(PLUGIN) "$(AU_DIR)/"
cp -R $(VST3PLUG) "$(VST3_DIR)/"
@# Ad-hoc codesign the plugins so macOS/DAWs accept them.
@if command -v codesign >/dev/null; then \
(codesign --force --deep --sign - "$(AU_DIR)/Gelyk EQ.component" 2>/dev/null || true); \
(codesign --force --deep --sign - "$(VST3_DIR)/Gelyk EQ.vst3" 2>/dev/null || true); \
fi
@echo ""
@echo "Installed:"
@echo " $(AU_DIR)/Gelyk EQ.component"
@echo " $(VST3_DIR)/Gelyk EQ.vst3"
@touch ~/Library/Preferences/com.apple.audio.InfoHelper 2>/dev/null || true
clean:
rm -rf $(BUILD_DIR)
.PHONY: all build cmake-configure install install-local clean
.PHONY: all build cmake-configure install clean

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@ -22,14 +22,14 @@ void FilterBand::prepare(double sampleRate, int blockSize)
switch (type)
{
case Type::lowShelf:
c = new Coeffs(Coeffs::makeLowShelf(sampleRate, freq, q, juce::Decibels::decibelsToGain(db)));
c = Coeffs::makeLowShelf(sampleRate, freq, q, juce::Decibels::decibelsToGain(db));
break;
case Type::highShelf:
c = new Coeffs(Coeffs::makeHighShelf(sampleRate, freq, q, juce::Decibels::decibelsToGain(db)));
c = Coeffs::makeHighShelf(sampleRate, freq, q, juce::Decibels::decibelsToGain(db));
break;
case Type::peak:
default:
c = new Coeffs(Coeffs::makePeakFilter(sampleRate, freq, q, juce::Decibels::decibelsToGain(db)));
c = Coeffs::makePeakFilter(sampleRate, freq, q, juce::Decibels::decibelsToGain(db));
break;
}
@ -60,7 +60,10 @@ void FilterBand::process(juce::dsp::AudioBlock<float>& block)
// ---------------------------------------------------------------------------
SpectrumAnalyser::SpectrumAnalyser()
: fft(12) // 4096 point FFT
{
const int size = fft.getSize();
fftBuffer.resize((size_t) (size * 2), 0.0f);
// The timer drives periodic background analysis.
startTimerHz(30);
}
@ -68,6 +71,7 @@ SpectrumAnalyser::SpectrumAnalyser()
void SpectrumAnalyser::prepare(double sr, int maxBlockSize)
{
const int size = 4096;
(void) maxBlockSize;
sampleRate = sr;
ring.setSize(2, size);
ring.clear();
@ -115,31 +119,29 @@ void SpectrumAnalyser::runAnalysis()
if (n == 0)
return;
juce::AudioBuffer<float> block(1, n);
// Mesa of the two channels and window with a Hann.
block.copyFrom(0, 0, ring, 0, 0, n);
if (ringChannels > 1)
block.addFrom(0, 0, ring, 1, 0, n);
juce::dsp::FFT fft(12); // 4096 point
juce::HeapBlock<std::complex<float>> fftData;
fftData.calloc((size_t) n);
for (int i = 0; i < n; ++i)
// Mesa of the two channels, Hann-windowed into the FFT buffer.
const auto fftSize = fft.getSize();
for (int i = 0; i < fftSize; ++i)
{
float v = block.getSample(0, i) * 0.5f;
const float win = 0.5f * (1.0f - std::cos(2.0f * juce::MathConstants<float>::pi * i / (n - 1)));
fftData[i] = std::complex<float>(v * win, 0.0f);
const int src = (ringFill - fftSize + i + n) % n; // contiguously oldest of last fftSize
float v = ring.getSample(0, src);
if (ringChannels > 1)
v = 0.5f * (v + ring.getSample(1, src));
const float win = 0.5f * (1.0f - std::cos(2.0f * juce::MathConstants<float>::pi * i / (fftSize - 1)));
fftBuffer[(size_t) i] = v * win;
}
fft.perform((juce::dsp::Complex<float>*) fftData.getData(), false);
for (size_t i = (size_t) fftSize; i < fftBuffer.size(); ++i)
fftBuffer[i] = 0.0f;
const int numBins = n / 2;
fft.performFrequencyOnlyForwardTransform(fftBuffer.data());
// Magnitude values (non-negative frequencies) are in the first size/2+1 entries.
const int numBins = juce::jmin((int) fftBuffer.size(), fftSize / 2 + 1);
juce::Array<float> mags;
mags.ensureStorageAllocated(numBins);
for (int i = 1; i < numBins; ++i)
for (int i = 0; i < numBins; ++i)
{
float re = fftData[i].real();
float im = fftData[i].imag();
float mag = std::sqrt(re * re + im * im);
float mag = fftBuffer[(size_t) i];
float db = 20.0f * std::log10(mag + 1.0e-9f);
mags.add(db);
}

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@ -37,6 +37,7 @@ class SpectrumAnalyser : public juce::Timer
{
public:
SpectrumAnalyser();
~SpectrumAnalyser() override = default;
void prepare(double sampleRate, int maxBlockSize);
void push(const float* const* channels, int numChannels, int numSamples);
@ -57,7 +58,10 @@ private:
void runAnalysis();
mutable juce::CriticalSection spectrumLock;
juce::Array<float> readySpectrum; // dB magnitudes per bin
juce::Array<float> readySpectrum; // magnitude per bin
juce::dsp::FFT fft;
std::vector<float> fftBuffer;
juce::AudioBuffer<float> ring;
int ringFill = 0;

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@ -3,6 +3,12 @@
namespace gelyk
{
static juce::Font monoFont(float height)
{
return juce::Font(juce::FontOptions(juce::Font::getDefaultMonospacedFontName(), height,
juce::Font::plain));
}
// ---------------------------------------------------------------------------
// NeonLookAndFeel
// ---------------------------------------------------------------------------
@ -26,23 +32,15 @@ void NeonLookAndFeel::drawLinearSlider(juce::Graphics& g, int x, int y, int widt
const float cx = x + width * 0.5f;
// Track
juce::Path track;
if (vertical)
{
const float tw = 2.0f;
juce::Path track;
track.addRoundedRectangle(cx - tw * 0.5f, (float) y, tw, (float) height, 1.0f);
}
else
{
const float th = 2.0f;
track.addRoundedRectangle((float) x, y + height * 0.5f - th * 0.5f, (float) width, th, 1.0f);
}
g.setColour(line);
g.fillPath(track);
// Filled region from centre (0 dB) down to the handle, glowing.
if (vertical)
{
const float midY = y + height * 0.5f;
const float top = juce::jmin(midY, sliderPos);
const float bottom = juce::jmax(midY, sliderPos);
@ -52,15 +50,20 @@ void NeonLookAndFeel::drawLinearSlider(juce::Graphics& g, int x, int y, int widt
g.fillPath(fill);
// Handle.
g.setColour(slider.isEnabled() && isMouseOverOrDragging(true) ? violet : cyan);
g.setColour(slider.isMouseOverOrDragging(true) ? violet : cyan);
g.fillEllipse(cx - 5.0f, sliderPos - 5.0f, 10.0f, 10.0f);
g.setColour(bg);
g.fillEllipse(cx - 2.0f, sliderPos - 2.0f, 4.0f, 4.0f);
}
else
{
const float th = 2.0f;
juce::Path track;
track.addRoundedRectangle((float) x, y + height * 0.5f - th * 0.5f, (float) width, th, 1.0f);
g.setColour(line);
g.fillPath(track);
g.setColour(cyan);
g.fillRect(x, y + height * 0.5f - 3.0f, (float) width, 6.0f);
g.drawHorizontalLine((int) (y + height * 0.5f), sliderPos - 5.0f, sliderPos + 5.0f);
}
}
@ -86,7 +89,7 @@ void NeonLookAndFeel::drawComboBox(juce::Graphics& g, int width, int height, boo
void NeonLookAndFeel::positionComboBoxText(juce::ComboBox& box, juce::Label& label)
{
label.setBounds(2, 1, box.getWidth() - 22, box.getHeight() - 2);
label.setFont(juce::FontOptions(13.0f).setTypefaceName(juce::Font::getDefaultMonospacedFontName()));
label.setFont(monoFont(13.0f));
}
// ---------------------------------------------------------------------------
@ -95,17 +98,14 @@ void NeonLookAndFeel::positionComboBoxText(juce::ComboBox& box, juce::Label& lab
GelykEQAudioProcessorEditor::GelykEQAudioProcessorEditor(GelykEQAudioProcessor& p)
: AudioProcessorEditor(&p),
processor(p),
analyserAttachment(processor.getAPVTS().parameterState,
"analyserEnabled",
[this](float v) { processor.getAnalyser().setEnabled(v > 0.5f); })
processor(p)
{
setLookAndFeel(&lookAndFeel);
setOpaque(true);
titleLabel = std::make_unique<juce::Label>("title", "GELYKEQ");
titleLabel->setFont(juce::FontOptions(26.0f).setTypefaceName(juce::Font::getDefaultMonospacedFontName()));
titleLabel->setColour(juce::Label::textColourId, cyan);
titleLabel->setFont(monoFont(26.0f));
titleLabel->setColour(juce::Label::textColourId, lookAndFeel.cyan);
titleLabel->setJustificationType(juce::Justification::centredLeft);
addAndMakeVisible(*titleLabel);
@ -116,25 +116,25 @@ GelykEQAudioProcessorEditor::GelykEQAudioProcessorEditor(GelykEQAudioProcessor&
scaleBox->addItem("175%", 175);
scaleBox->addItem("200%", 200);
scaleBox->setSelectedId(100, juce::dontSendNotification);
scaleBox->setTooltip("UI scaling");
scaleBox->onChange = [this] { scaleUI((float) scaleBox->getSelectedId()); };
addAndMakeVisible(*scaleBox);
// Master gain (vertical fader, far right).
masterLabel = std::make_unique<juce::Label>("mlab", "MASTER");
masterLabel->setFont(juce::FontOptions(11.0f).setTypefaceName(juce::Font::getDefaultMonospacedFontName()));
masterLabel->setColour(juce::Label::textColourId, magenta);
masterLabel->setFont(monoFont(11.0f));
masterLabel->setColour(juce::Label::textColourId, lookAndFeel.magenta);
masterLabel->setJustificationType(juce::Justification::centred);
master = std::make_unique<juce::Slider>(juce::Slider::LinearVertical,
juce::Slider::TextBoxBelow);
master = std::make_unique<juce::Slider>(juce::Slider::LinearVertical, juce::Slider::TextBoxBelow);
master->setLookAndFeel(&lookAndFeel);
master->setSliderStyle(juce::Slider::LinearVertical);
master->setTextBoxStyle(juce::Slider::TextBoxBelow, false, 40, 14);
master->setRange(-24.0, 24.0, 0.01);
master->setDoubleClickReturnValue(true, 0.0);
addAndMakeVisible(*masterLabel);
addAndMakeVisible(*master);
masterAttachment = std::make_unique<juce::AudioProcessorValueTreeState::SliderAttachment>(
processor.getAPVTS(), "master", *master);
// Band faders.
const char* const names[numBands] = { "LOW", "LOW-MID", "MID", "HIGH-MID", "HIGH" };
const char* const freqs[numBands] = { "60", "200", "1K", "4K", "10K" };
@ -143,13 +143,14 @@ GelykEQAudioProcessorEditor::GelykEQAudioProcessorEditor(GelykEQAudioProcessor&
auto& w = bands[i];
w.freqLabel = std::make_unique<juce::Label>("freq", freqs[i]);
w.freqLabel->setFont(juce::FontOptions(13.0f).setTypefaceName(juce::Font::getDefaultMonospacedFontName()));
w.freqLabel->setColour(juce::Label::textColourId, textDim);
w.freqLabel->setFont(monoFont(13.0f));
w.freqLabel->setColour(juce::Label::textColourId, lookAndFeel.textDim);
w.freqLabel->setJustificationType(juce::Justification::centred);
w.gainLabel = std::make_unique<juce::Label>("gname", names[i]);
w.gainLabel->setFont(juce::FontOptions(11.0f).setTypefaceName(juce::Font::getDefaultMonospacedFontName()));
w.gainLabel->setColour(juce::Label::textColourId, i % 2 == 0 ? cyan : magenta);
w.gainLabel->setFont(monoFont(11.0f));
w.gainLabel->setColour(juce::Label::textColourId,
i % 2 == 0 ? lookAndFeel.cyan : lookAndFeel.magenta);
w.gainLabel->setJustificationType(juce::Justification::centred);
w.gain = std::make_unique<juce::Slider>(juce::Slider::LinearVertical, juce::Slider::TextBoxBelow);
@ -177,14 +178,14 @@ GelykEQAudioProcessorEditor::GelykEQAudioProcessorEditor(GelykEQAudioProcessor&
// Status bar.
statusGit = std::make_unique<juce::Label>("git", processor.getGitInfo());
statusGit->setFont(juce::FontOptions(11.0f).setTypefaceName(juce::Font::getDefaultMonospacedFontName()));
statusGit->setColour(juce::Label::textColourId, textDim);
statusGit->setFont(monoFont(11.0f));
statusGit->setColour(juce::Label::textColourId, lookAndFeel.textDim);
statusGit->setJustificationType(juce::Justification::centredRight);
statusBar = std::make_unique<juce::Label>("status",
"GELYKEQ v" + juce::String(ProjectInfo::versionString) + " | AU / VST3 ");
statusBar->setFont(juce::FontOptions(11.0f).setTypefaceName(juce::Font::getDefaultMonospacedFontName()));
statusBar->setColour(juce::Label::textColourId, textDim);
"GELYKEQ v" + juce::String(ProjectInfo::versionString) + " | ANALYSER");
statusBar->setFont(monoFont(11.0f));
statusBar->setColour(juce::Label::textColourId, lookAndFeel.cyan.withAlpha(0.8f));
statusBar->setJustificationType(juce::Justification::centredLeft);
addAndMakeVisible(*statusBar);
addAndMakeVisible(*statusGit);
@ -193,7 +194,6 @@ GelykEQAudioProcessorEditor::GelykEQAudioProcessorEditor(GelykEQAudioProcessor&
freqBins.ensureStorageAllocated(128);
startTimerHz(30);
rebuildFaders();
scaleUI(100.0f);
}
@ -211,7 +211,6 @@ void GelykEQAudioProcessorEditor::timerCallback()
void GelykEQAudioProcessorEditor::rebuildFaders()
{
// Nothing needed at construction; sliders are attachments.
}
void GelykEQAudioProcessorEditor::scaleUI(float percent)
@ -233,7 +232,7 @@ void GelykEQAudioProcessorEditor::resized()
// Header.
juce::Rectangle<int> header = area.removeFromTop(headerH);
titleLabel->setBounds(header.removeFromLeft((int) (160 * s)).reduced(pad, 0));
titleLabel->setBounds(header.removeFromLeft((int) (170 * s)).reduced(pad, 0));
scaleBox->setBounds(header.removeFromRight((int) (90 * s)).reduced((int)(6*s), (int)(9*s)));
// Footer.
@ -244,12 +243,12 @@ void GelykEQAudioProcessorEditor::resized()
// Main grid.
const int masterW = (int) (64 * s);
juce::Rectangle<int> mainArea = area;
juce::Rectangle<int> masterArea = mainArea.removeFromRight(masterW);
juce::Rectangle<int> masterArea = area.removeFromRight(masterW);
const int x0 = mainArea.getX();
const int y0 = mainArea.getY();
const int totalW = mainArea.getWidth();
const int x0 = area.getX();
const int y0 = area.getY();
const int totalW = area.getWidth();
const int height = area.getHeight();
const int gap = (int) (10 * s);
const int colW = (totalW - gap * (numBands - 1)) / numBands;
@ -257,35 +256,37 @@ void GelykEQAudioProcessorEditor::resized()
for (int i = 0; i < numBands; ++i)
{
auto& w = bands[i];
juce::Rectangle<int> col(x0 + i * (colW + gap), y0, colW, mainArea.getHeight());
juce::Rectangle<int> col(x0 + i * (colW + gap), y0, colW, height);
const int topLabelH = (int) (18 * s);
const int topLabelH = (int) (20 * s);
const int freqH = (int) (16 * s);
const int gainH = (int) (14 * s);
const int gainSliderH = (int) (58 * s);
const int qH = (int) (18 * s);
juce::Rectangle<int> sub = col.reduced((int)(8*s), 0);
w.gainLabel->setBounds(sub.removeFromTop(topLabelH));
w.gainLabel->setBounds(col.removeFromTop(topLabelH));
juce::Rectangle<int> analyserArea = sub.removeFromTop(sub.getHeight() - freqH - gainH - (int)(18*s) - (int)(10*s));
const int analyserH = col.getHeight() - freqH - gainSliderH - qH - (int)(8*s);
// reserve analyser space by subtracting it (faders sit on top of the spectrum)
col.removeFromTop(juce::jmax(0, analyserH));
w.freqLabel->setBounds(sub.removeFromTop(freqH));
w.gain->setBounds(sub.removeFromTop(gainH + (int)(34*s)));
w.freqLabel->setBounds(col.removeFromTop(freqH));
w.gain->setBounds(col.removeFromTop(gainSliderH));
w.q->setBounds(col.removeFromBottom((int)(18*s)).reduced((int)(8*s), 0));
juce::Rectangle<int> qArea = col.removeFromBottom(qH);
w.q->setBounds(qArea.reduced((int)(12*s), 0));
}
// Master column.
juce::Rectangle<int> msub = masterArea.reduced((int)(14*s), 0);
masterLabel->setBounds(msub.removeFromTop((int) (18 * s)));
juce::Rectangle<int> msub = masterArea.reduced((int)(14*s), (int)(6*s));
masterLabel->setBounds(msub.removeFromTop((int) (20 * s)));
master->setBounds(msub);
}
void GelykEQAudioProcessorEditor::paint(juce::Graphics& g)
{
const float s = scaling.load();
g.fillAll(bg);
g.fillAll(lookAndFeel.bg);
// Analyser canvas area matches fader columns.
juce::Rectangle<int> area = getLocalBounds();
const int headerH = (int) (46 * s);
const int footerH = (int) (26 * s);
@ -294,38 +295,37 @@ void GelykEQAudioProcessorEditor::paint(juce::Graphics& g)
mainArea.removeFromBottom(footerH);
mainArea.removeFromRight((int) (64 * s));
// Neon grid lines behind faders.
g.setColour(line);
for (int i = 0; i < 4; ++i)
const int topPad = (int) (20 * s);
const int botPad = (int) (28 * s);
const float topY = (float) (mainArea.getY() + topPad);
const float botY = (float) (mainArea.getY() + mainArea.getHeight() - botPad);
// Neon grid lines.
g.setColour(lookAndFeel.line);
for (int i = 1; i <= 4; ++i)
{
float f = (i + 1) / 5.0f;
// 0 dB line.
if (i == 2)
continue;
float yy = mainArea.getY() + 18.0f * s + (mainArea.getHeight() - 18.0f * s - 60.0f * s) * f;
g.drawHorizontalLine((int) yy + (int)(18*s), (float) mainArea.getX(), (float) mainArea.getRight());
if (i == 3) continue; // skip the 0 dB centre (drawn separately)
float yy = topY + (botY - topY) * (i / 5.0f);
g.drawHorizontalLine((int) yy, (float) mainArea.getX(), (float) mainArea.getRight());
}
// The 0 dB centre line (glowing).
const float centreLineY = mainArea.getY() + (int)(18*s) +
(mainArea.getHeight() - (int)(18*s) - (int)(60*s)) * 0.5f;
g.setColour(cyan.withAlpha(0.55f));
// 0 dB centre line (glowing cyan).
const float centreLineY = topY + (botY - topY) * 0.5f;
g.setColour(lookAndFeel.cyan.withAlpha(0.55f));
g.drawHorizontalLine((int) centreLineY, (float) mainArea.getX(), (float) mainArea.getRight());
// Spectrum overlay.
if (spectrum.size() > 2)
{
juce::Path path;
const int x0 = mainArea.getX();
const int width = mainArea.getWidth();
const float topY = mainArea.getY() + 18.0f * s;
const float botY = mainArea.getY() + (int)(8*s) + (mainArea.getHeight() - (int)(18*s) - (int)(60*s)) * 0.92f;
const float x0 = (float) mainArea.getX();
const float width = (float) mainArea.getWidth();
for (int i = 0; i < spectrum.size(); ++i)
{
float db = juce::jlimit(-72.0f, 12.0f, spectrum[i]);
float norm = (db + 72.0f) / 84.0f; // 0..1 up
float xx = (float) x0 + (float) i / (float) (spectrum.size() - 1) * width;
float xx = x0 + (float) i / (float) (spectrum.size() - 1) * width;
float yy = botY - norm * (botY - topY);
if (i == 0) path.startNewSubPath(xx, yy);
else path.lineTo(xx, yy);
@ -336,11 +336,12 @@ void GelykEQAudioProcessorEditor::paint(juce::Graphics& g)
filled.lineTo((float) mainArea.getX(), botY);
filled.closeSubPath();
g.setGradientFill(juce::ColourGradient(magenta.withAlpha(0.35f), (float) mainArea.getX(), topY,
magenta.withAlpha(0.05f), (float) mainArea.getX(), botY,
false));
g.setGradientFill(juce::ColourGradient(lookAndFeel.magenta.withAlpha(0.30f),
(float) mainArea.getX(), topY,
lookAndFeel.magenta.withAlpha(0.05f),
(float) mainArea.getX(), botY, false));
g.fillPath(filled);
g.setColour(cyan.withAlpha(0.9f));
g.setColour(lookAndFeel.cyan.withAlpha(0.9f));
g.strokePath(path, juce::PathStrokeType(1.6f * s));
}
}

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@ -67,12 +67,10 @@ private:
std::unique_ptr<juce::Label> statusBar;
std::unique_ptr<juce::Label> statusGit;
juce::AudioProcessorValueTreeState::SliderAttachment gainAttachments[numBands];
juce::AudioProcessorValueTreeState::SliderAttachment qAttachments[numBands];
std::unique_ptr<juce::AudioProcessorValueTreeState::SliderAttachment> gainAttachments[numBands];
std::unique_ptr<juce::AudioProcessorValueTreeState::SliderAttachment> qAttachments[numBands];
std::unique_ptr<juce::AudioProcessorValueTreeState::SliderAttachment> masterAttachment;
juce::AudioProcessorValueTreeState::ParameterAttachment analyserAttachment;
juce::Array<float> spectrum;
juce::Array<float> freqBins;
std::atomic<float> scaling { 1.0f }; // for resized()