From 1abf4f4b600d6a9ed95e8bed404f531ab033966a Mon Sep 17 00:00:00 2001
From: Armin <armin@cherry>
Date: Wed, 15 Jul 2026 23:51:38 +0200
Subject: [PATCH] Add distortion Symmetry and Tone knobs

---
 Source/DSP/Distortion.h    | 21 +++++++++++++++++----
 Source/PluginProcessor.cpp |  5 ++++-
 2 files changed, 21 insertions(+), 5 deletions(-)

diff --git a/Source/DSP/Distortion.h b/Source/DSP/Distortion.h
index 06d7425..763be02 100644
--- a/Source/DSP/Distortion.h
+++ b/Source/DSP/Distortion.h
@@ -8,10 +8,12 @@ class Distortion {
 public:
     void prepare(double /*sr*/) {}
 
-    void setParameters(DistortionType type, float amount, float mix) {
+    void setParameters(DistortionType type, float amount, float symmetry, float tone) {
         distType = type;
         distAmount = amount;
-        dryWet = mix;
+        distSymmetry = symmetry;
+        distTone = tone;
+        dryWet = 1.0f;
     }
 
     float process(float input) {
@@ -58,7 +60,15 @@ public:
                 break;
         }
 
-        if (distAmount < 0.001f)
+        // Asymmetry: bias the signal before/after shaping for even-harmonic grit
+        wet += distSymmetry * 0.5f;
+
+        // Tone: one-pole low-pass to tame harsh high harmonics
+        float lpCoeff = distTone * 0.9f + 0.05f;
+        toneState += lpCoeff * (wet - toneState);
+        wet = toneState;
+
+        if (distAmount < 0.001f && std::abs(distSymmetry) < 0.001f)
             return input;
 
         return input + (wet - input) * dryWet;
@@ -67,5 +77,8 @@ public:
 private:
     DistortionType distType = DistortionType::SoftClip;
     float distAmount = 0.0f;
-    float dryWet = 0.0f;
+    float distSymmetry = 0.0f;
+    float distTone = 1.0f;
+    float dryWet = 1.0f;
+    float toneState = 0.0f;
 };
diff --git a/Source/PluginProcessor.cpp b/Source/PluginProcessor.cpp
index 97684ff..e9432d5 100644
--- a/Source/PluginProcessor.cpp
+++ b/Source/PluginProcessor.cpp
@@ -43,6 +43,7 @@ juce::AudioProcessorValueTreeState::ParameterLayout ChromaFlockProcessor::create
     juce::AudioProcessorValueTreeState::ParameterLayout layout;
 
     auto zeroOne = juce::NormalisableRange<float>(0.0f, 1.0f, 0.01f);
+    auto minusOneOne = juce::NormalisableRange<float>(-1.0f, 1.0f, 0.01f);
 
     // LFO1 depth: fine 0.001 step, with a skew of 2.0 (value = p^2) so the
     // lower knob range resolves much finer and the 0.001 step only applies
@@ -153,7 +154,9 @@ juce::AudioProcessorValueTreeState::ParameterLayout ChromaFlockProcessor::create
     layout.add(std::make_unique<juce::AudioParameterFloat>(
         juce::ParameterID{"distAmount", 1}, "Dist Amount", zeroOne, 0.0f));
     layout.add(std::make_unique<juce::AudioParameterFloat>(
-        juce::ParameterID{"distMix", 1}, "Dist Mix", zeroOne, 0.0f));
+        juce::ParameterID{"distSymmetry", 1}, "Dist Symmetry", minusOneOne, 0.0f));
+    layout.add(std::make_unique<juce::AudioParameterFloat>(
+        juce::ParameterID{"distTone", 1}, "Dist Tone", zeroOne, 1.0f));
 
     // COMPRESSOR
     layout.add(std::make_unique<juce::AudioParameterFloat>(