v1.1: Add New Band button and FIR quality selector

- New Band button in header bar for adding EQ nodes
- FIR latency dropdown: 4096 (~46ms), 8192 (~93ms), 16384 (~186ms)
- Version bump to 1.1

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Source/PluginEditor.cpp

@@ -23,6 +23,34 @@ InstaLPEQEditor::InstaLPEQEditor (InstaLPEQProcessor& p)
     bypassLabel.setColour (juce::Label::textColourId, InstaLPEQLookAndFeel::textSecondary);
     addAndMakeVisible (bypassLabel);
 
+    // New Band button
+    newBandButton.onClick = [this]
+    {
+        if (processor.getNumBands() < InstaLPEQProcessor::maxBands)
+        {
+            processor.addBand (1000.0f, 0.0f);
+            syncDisplayFromProcessor();
+            curveDisplay.setSelectedBand (processor.getNumBands() - 1);
+        }
+    };
+    addAndMakeVisible (newBandButton);
+
+    // Quality selector (FIR latency)
+    qualitySelector.addItem ("4096 (~46ms)", 1);
+    qualitySelector.addItem ("8192 (~93ms)", 2);
+    qualitySelector.addItem ("16384 (~186ms)", 3);
+    qualitySelector.setSelectedId (2, juce::dontSendNotification);  // default 8192
+    qualitySelector.onChange = [this]
+    {
+        int sel = qualitySelector.getSelectedId();
+        int order = (sel == 1) ? 12 : (sel == 2) ? 13 : 14;
+        processor.setQuality (order);
+    };
+    addAndMakeVisible (qualitySelector);
+    qualityLabel.setFont (customLookAndFeel.getMediumFont (13.0f));
+    qualityLabel.setJustificationType (juce::Justification::centredRight);
+    addAndMakeVisible (qualityLabel);
+
     // EQ curve
     curveDisplay.setListener (this);
     addAndMakeVisible (curveDisplay);
@@ -102,18 +130,23 @@ void InstaLPEQEditor::resized()
     bypassLabel.setBounds (bypassArea.removeFromLeft (50));
     bypassToggle.setBounds (bypassArea);
 
+    newBandButton.setBounds (header.removeFromRight ((int) (90 * scale)).reduced (2));
+
     // Bottom master row
     int masterH = (int) std::max (50.0f, 65.0f * scale);
     auto masterArea = bounds.removeFromBottom (masterH).reduced (pad, 2);
 
-    // Divider above master
-    // (painted in paint())
-
     masterGainLabel.setFont (customLookAndFeel.getMediumFont (std::max (11.0f, 14.0f * scale)));
     auto labelArea = masterArea.removeFromLeft (60);
     masterGainLabel.setBounds (labelArea);
     masterGainSlider.setBounds (masterArea.removeFromLeft (masterH));
 
+    // Quality selector on the right side of master row
+    qualityLabel.setFont (customLookAndFeel.getMediumFont (std::max (11.0f, 14.0f * scale)));
+    auto qLabelArea = masterArea.removeFromRight (30);
+    qualityLabel.setBounds (qLabelArea);
+    qualitySelector.setBounds (masterArea.removeFromRight ((int) (130 * scale)).reduced (2, (masterH - 24) / 2));
+
     // Node parameter panel (15% of remaining height)
     int nodePanelH = (int) (bounds.getHeight() * 0.18f);
     auto nodePanelArea = bounds.removeFromBottom (nodePanelH).reduced (pad, 2);

Source/PluginEditor.h

@@ -39,10 +39,14 @@ private:
     NodeParameterPanel nodePanel;
 
     juce::Label titleLabel { {}, "INSTALPEQ" };
-    juce::Label versionLabel { {}, "v1.0" };
+    juce::Label versionLabel { {}, "v1.1" };
     juce::ToggleButton bypassToggle;
     juce::Label bypassLabel { {}, "BYPASS" };
 
+    juce::TextButton newBandButton { "NEW BAND" };
+    juce::ComboBox qualitySelector;
+    juce::Label qualityLabel { {}, "FIR" };
+
     juce::Slider masterGainSlider;
     juce::Label masterGainLabel { {}, "MASTER" };
 

Source/PluginProcessor.cpp

@@ -125,6 +125,13 @@ void InstaLPEQProcessor::updateFIR()
     firEngine.setBands (currentBands);
 }
 
+void InstaLPEQProcessor::setQuality (int fftOrder)
+{
+    firEngine.setFFTOrder (fftOrder);
+    setLatencySamples (firEngine.getLatencySamples());
+    updateFIR();
+}
+
 // ============================================================
 // State save/restore
 // ============================================================

Source/PluginProcessor.h

@@ -44,6 +44,8 @@ public:
     std::atomic<bool> bypassed { false };
     std::atomic<float> masterGainDb { 0.0f };
 
+    void setQuality (int fftOrder);
+
     FIREngine& getFIREngine() { return firEngine; }
     double getCurrentSampleRate() const { return currentSampleRate; }