diff --git a/Source/PluginProcessor.cpp b/Source/PluginProcessor.cpp
index 6e25aaec..50cfb10d 100644
--- a/Source/PluginProcessor.cpp
+++ b/Source/PluginProcessor.cpp
@@ -17,6 +17,7 @@
 #include "audio/MultiplexEffect.h"
 #include "audio/SmoothEffect.h"
 #include "audio/WobbleEffect.h"
+#include "audio/HarmonicDuplicatorEffect.h"
 #include "audio/DashedLineEffect.h"
 #include "audio/VectorCancellingEffect.h"
 #include "audio/ScaleEffect.h"
@@ -48,6 +49,7 @@ OscirenderAudioProcessor::OscirenderAudioProcessor() : CommonAudioProcessor(Buse
     toggleableEffects.push_back(DashedLineEffect(*this).build());
     toggleableEffects.push_back(TraceEffect(*this).build());
     toggleableEffects.push_back(WobbleEffect(*this).build());
+    toggleableEffects.push_back(HarmonicDuplicatorEffect(*this).build());
 
 #if OSCI_PREMIUM
     toggleableEffects.push_back(MultiplexEffect(*this).build());
diff --git a/Source/audio/HarmonicDuplicatorEffect.h b/Source/audio/HarmonicDuplicatorEffect.h
new file mode 100644
index 00000000..5c3f50d9
--- /dev/null
+++ b/Source/audio/HarmonicDuplicatorEffect.h
@@ -0,0 +1,42 @@
+#pragma once
+#include <JuceHeader.h>
+#include "../PluginProcessor.h"
+
+class HarmonicDuplicatorEffect : public osci::EffectApplication {
+public:
+    HarmonicDuplicatorEffect(OscirenderAudioProcessor& p) : audioProcessor(p) {}
+
+    osci::Point apply(int index, osci::Point input, const std::vector<std::atomic<double>>& values, double sampleRate) override {
+        const double twoPi = juce::MathConstants<double>::twoPi;
+        double copies = juce::jmax(1.0, values[0].load());
+        double dist = juce::jlimit(0.0, 1.0, values[1].load());
+        double angleOffset = values[2].load() * juce::MathConstants<double>::twoPi;
+
+        double theta = std::floor(framePhase * copies) / copies * twoPi + angleOffset;
+        osci::Point offset(std::cos(theta), std::sin(theta), 0.0);
+
+        framePhase += audioProcessor.frequency / copies / sampleRate;
+        framePhase = framePhase - std::floor(framePhase);
+
+        return (1 - dist) * input + dist * offset;
+    }
+
+    std::shared_ptr<osci::Effect> build() const override {
+        auto eff = std::make_shared<osci::Effect>(
+            std::make_shared<HarmonicDuplicatorEffect>(audioProcessor),
+            std::vector<osci::EffectParameter*>{
+                // TODO ID strings
+                new osci::EffectParameter("Copies", "Controls the number of copies of the input shape to draw.", "rdCopies", VERSION_HINT, 3.0, 1.0, 10.0),
+                new osci::EffectParameter("Distance", "Controls the distance between copies of the input shape.", "rdMix", VERSION_HINT, 0.5, 0.0, 1.0),
+                new osci::EffectParameter("Angle Offset", "Rotates the offsets between copies without rotating the input shape.", "rdAngle", VERSION_HINT, 0.0, 0.0, 1.0, 0.0001, osci::LfoType::Sawtooth, 1.0)
+        }
+        );
+        eff->setName("Radial Duplicator");
+        eff->setIcon(BinaryData::kaleidoscope_svg);
+        return eff;
+    }
+
+private:
+    OscirenderAudioProcessor &audioProcessor;
+    double framePhase = 0.0; // [0, 1]
+};
\ No newline at end of file
diff --git a/osci-render.jucer b/osci-render.jucer
index 98a4786c..00da3164 100644
--- a/osci-render.jucer
+++ b/osci-render.jucer
@@ -165,6 +165,8 @@
     </GROUP>
     <GROUP id="{75439074-E50C-362F-1EDF-8B4BE9011259}" name="Source">
       <GROUP id="{85A33213-D880-BD92-70D8-1901DA6D23F0}" name="audio">
+        <FILE id="yxWOsR" name="HarmonicDuplicatorEffect.h" compile="0" resource="0"
+              file="Source/audio/HarmonicDuplicatorEffect.h"/>
         <FILE id="HE3dFE" name="AudioRecorder.h" compile="0" resource="0" file="Source/audio/AudioRecorder.h"/>
         <FILE id="Bc8UeW" name="BitCrushEffect.h" compile="0" resource="0"
               file="Source/audio/BitCrushEffect.h"/>