Some splitting of code

Source/SynthVoice/Flanger.h

@@ -0,0 +1,43 @@
+#pragma once
+#include "../SynthVoice.h"
+
+void NeuralSynthVoice::renderFlanger(int numSamples, int numCh)
+{
+    // ================================================================
+    // Flanger (pre-filter) – manual per-sample to set varying delay
+    // ================================================================
+    auto& flanger = chain.get<flangerIndex>();
+
+    const bool enabled = shared.flangerOn && shared.flangerOn->load() > 0.5f;
+    if (enabled)
+    {
+        const float rate         = shared.flangerRate     ? shared.flangerRate->load()     : 0.0f;
+        float       lfoPhase     = shared.flangerPhase    ? shared.flangerPhase->load()    : 0.0f;
+        const float flangerDepth = shared.flangerDepth    ? shared.flangerDepth->load()    : 0.0f; // ms
+        const float mix          = shared.flangerDryMix   ? shared.flangerDryMix->load()   : 0.0f;
+        const float feedback     = shared.flangerFeedback ? shared.flangerFeedback->load() : 0.0f;
+        const float baseDelayMs  = shared.flangerDelay    ? shared.flangerDelay->load()    : 0.25f;
+
+        for (int i = 0; i < numSamples; ++i)
+        {
+            const float in = tempBuffer.getReadPointer (0)[i];
+
+            const float lfo = std::sin (lfoPhase);
+            const float delayMs = baseDelayMs + 0.5f * (1.0f + lfo) * flangerDepth;
+            const float delaySamples = juce::jmax (0.0f, delayMs * 0.001f * (float) spec.sampleRate);
+
+            flanger.setDelay (delaySamples);
+
+            const float delayed = flanger.popSample (0);
+            flanger.pushSample (0, in + delayed * feedback);
+
+            const float out = in * (1.0f - mix) + delayed * mix;
+            for (int ch = 0; ch < numCh; ++ch)
+                tempBuffer.getWritePointer (ch)[i] = out;
+
+            lfoPhase += juce::MathConstants<float>::twoPi * rate / (float) spec.sampleRate;
+            if (lfoPhase > juce::MathConstants<float>::twoPi)
+                lfoPhase -= juce::MathConstants<float>::twoPi;
+        }
+    }
+}