Fx by @jnonis

.github/workflows/build.yml

@@ -7,7 +7,6 @@ on:
   push:
     branches: [ main ]
   pull_request:
-    branches: [ main ]
 
 jobs:
   Build:

src/Makefile

@@ -9,9 +9,38 @@ CMSIS_DIR = ../CMSIS_5/CMSIS
 OBJS = main.o kernel.o minidexed.o config.o userinterface.o uimenu.o \
        mididevice.o midikeyboard.o serialmididevice.o pckeyboard.o \
        sysexfileloader.o performanceconfig.o perftimer.o \
-       effect_compressor.o effect_platervbstereo.o uibuttons.o midipin.o
+       uibuttons.o midipin.o effect_compressor.o \
+       effect_audio/effect_chorus.o \
+       effect_audio/effect_delay.o \
+       effect_audio/effect_platervbstereo.o \
+       effect_audio/effect_talreverb3.o \
+       effect_audio/effect_mverb.o \
+       effect_audio/effect_ds1.o \
+       effect_audio/effect_bigmuff.o \
+       effect_audio/moddistortion/Distortion_DS1.o \
+       effect_audio/moddistortion/Distortion_BigMuff.o \
+       effect_audio/moddistortion/HyperbolicTables.o \
+       effect_audio/moddistortion/OverSample.o \
+       effect_audio/rkrlv2/EffectLFO.o \
+       effect_audio/rkrlv2/Phaser.o \
+       effect_audio/rkrlv2/APhaser.o \
+       effect_audio/rkrlv2/delayline.o \
+       effect_audio/rkrlv2/Chorus.o \
+       effect_midi/midi_arp.o \
+       effect_midi/modarpeggiator/common/clock.o \
+       effect_midi/modarpeggiator/common/midiHandler.o \
+       effect_midi/modarpeggiator/common/pattern.o \
+       effect_midi/modarpeggiator/utils.o \
+       effect_midi/modarpeggiator/arpeggiator.o
 
 OPTIMIZE = -O3
 
 include ./Synth_Dexed.mk
 include ./Rules.mk
+
+EXTRACLEAN += effect_audio/*.[od] \
+              effect_audio/moddistortion/*.[od] \
+              effect_audio/rkrlv2/*.[od] \
+              effect_midi/*.[od] \
+              effect_midi/modarpeggiator/*.[od] \
+              effect_midi/modarpeggiator/common/*.[od]

src/config.h

@@ -49,6 +49,7 @@ class CConfig		// Configuration for MiniDexed
 	static const unsigned MaxNotes = 16;
 #endif
 
+	static const unsigned TGChannels = 2;
 	static const unsigned MaxChunkSize = 4096;
 
 #if RASPPI <= 3

src/effect_audio/effect_3bandeq.h

@@ -0,0 +1,185 @@
+/* 
+ * DISTHRO 3 Band EQ
+ * Ported from https://github.com/DISTRHO/Mini-Series/blob/master/plugins/3BandEQ
+ *  
+ * Javier Nonis (https://github.com/jnonis) - 2024
+ */
+#ifndef _EFFECT_3BANDEQ_H
+#define _EFFECT_3BANDEQ_H
+
+#include <cmath>
+#include "effect_base.h"
+
+class AudioEffect3BandEQ : public AudioEffect
+{
+public:
+    // ID must be unique for each AudioEffect
+    static const unsigned ID = 9;
+    static constexpr const char* NAME = "3Band EQ";
+
+    static constexpr float kAMP_DB = 8.656170245f;
+    static constexpr float kDC_ADD = 1e-30f;
+    static constexpr float kPI     = 3.141592654f;
+
+    enum Param
+    {
+        BYPASS,
+        EQ_LOW,
+        EQ_MID,
+        EQ_HIGH,
+        MASTER,
+        LOW_MID_FQ,
+        MID_HIGH_FQ,
+        UNKNOWN
+    };
+
+    AudioEffect3BandEQ(float32_t samplerate) : AudioEffect(samplerate)
+    {
+        // Default values
+        fLow = 0.0f;
+        fMid = 0.0f;
+        fHigh = 0.0f;
+        fMaster = 0.0f;
+        fLowMidFreq = 440.0f;
+        fMidHighFreq = 2000.0f;
+
+        // Internal stuff
+        lowVol = midVol = highVol = outVol = 1.0f;
+        freqLP = 200.0f;
+        freqHP = 2000.0f;
+
+        // reset filter values
+        xLP  = std::exp(-2.0f * kPI * freqLP / samplerate);
+
+        a0LP = 1.0f - xLP;
+        b1LP = -xLP;
+
+        xHP  = std::exp(-2.0f * kPI * freqHP / samplerate);
+        a0HP = 1.0f - xHP;
+        b1HP = -xHP;
+
+        out1LP = out2LP = out1HP = out2HP = 0.0f;
+        tmp1LP = tmp2LP = tmp1HP = tmp2HP = 0.0f;
+    }
+
+    virtual ~AudioEffect3BandEQ()
+    {
+    }
+
+    virtual unsigned getId()
+    {
+        return AudioEffect3BandEQ::ID;
+    }
+
+    virtual std::string getName()
+    {
+        return AudioEffect3BandEQ::NAME;
+    }
+
+    virtual void setParameter(unsigned param, unsigned value)
+    {
+        switch (param)
+        {
+        case AudioEffect3BandEQ::Param::BYPASS:
+            this->setBypass(value == 1);
+            break;
+        case AudioEffect3BandEQ::Param::EQ_LOW:
+            fLow = (value / 100.0f) * 48.0f - 24.0f;
+            lowVol = std::exp( (fLow/48.0f) * 48.0f / kAMP_DB);
+            break;
+        case AudioEffect3BandEQ::Param::EQ_MID:
+            fMid = (value / 100.0f) * 48.0f - 24.0f;
+            midVol = std::exp( (fMid/48.0f) * 48.0f / kAMP_DB);
+            break;
+        case AudioEffect3BandEQ::Param::EQ_HIGH:
+            fHigh = (value / 100.0f) * 48.0f - 24.0f;
+            highVol = std::exp( (fHigh/48.0f) * 48.0f / kAMP_DB);
+            break;
+        case AudioEffect3BandEQ::Param::MASTER:
+            fMaster = (value / 100.0f) * 48.0f - 24.0f;
+            outVol = std::exp( (fMaster/48.0f) * 48.0f / kAMP_DB);
+            break;
+        case AudioEffect3BandEQ::Param::LOW_MID_FQ:
+            fLowMidFreq = std::min((float) value, fMidHighFreq);
+            freqLP = fLowMidFreq;
+            xLP  = std::exp(-2.0f * kPI * freqLP / (float)samplerate);
+            a0LP = 1.0f - xLP;
+            b1LP = -xLP;
+            break;
+        case AudioEffect3BandEQ::Param::MID_HIGH_FQ:
+            fMidHighFreq = std::max((float) value, fLowMidFreq);
+            freqHP = fMidHighFreq;
+            xHP  = std::exp(-2.0f * kPI * freqHP / (float)samplerate);
+            a0HP = 1.0f - xHP;
+            b1HP = -xHP;
+            break;
+        default:
+            break;
+        }
+    }
+
+    virtual unsigned getParameter(unsigned param)
+    {
+        switch (param)
+        {
+        case AudioEffect3BandEQ::Param::BYPASS:
+            return this->getBypass() ? 1 : 0;
+        case AudioEffect3BandEQ::Param::EQ_LOW:
+            return roundf(((fLow + 24.0f) / 48.0f) * 100.0f);
+        case AudioEffect3BandEQ::Param::EQ_MID:
+            return roundf(((fMid + 24.0f) / 48.0f) * 100.0f);
+        case AudioEffect3BandEQ::Param::EQ_HIGH:
+            return roundf(((fHigh + 24.0f) / 48.0f) * 100.0f);
+        case AudioEffect3BandEQ::Param::MASTER:
+            return roundf(((fMaster + 24.0f) / 48.0f) * 100.0f);
+        case AudioEffect3BandEQ::Param::LOW_MID_FQ:
+            return fLowMidFreq;
+        case AudioEffect3BandEQ::Param::MID_HIGH_FQ:
+            return fMidHighFreq;
+        default:
+            return 0;
+        }
+    }
+
+protected:
+    virtual size_t getParametersSize()
+    {
+        return AudioEffect3BandEQ::Param::UNKNOWN;
+    }
+    virtual void doProcess(const float32_t* inblockL, const float32_t* inblockR, float32_t* outblockL, float32_t* outblockR, uint16_t len)
+    {
+        const float* in1 = inblockL;
+        const float* in2 = inblockR;
+        float* out1 = outblockL;
+        float* out2 = outblockR;
+
+        for (uint32_t i=0; i < len; ++i)
+        {
+            tmp1LP = a0LP * in1[i] - b1LP * tmp1LP + kDC_ADD;
+            tmp2LP = a0LP * in2[i] - b1LP * tmp2LP + kDC_ADD;
+            out1LP = tmp1LP - kDC_ADD;
+            out2LP = tmp2LP - kDC_ADD;
+
+            tmp1HP = a0HP * in1[i] - b1HP * tmp1HP + kDC_ADD;
+            tmp2HP = a0HP * in2[i] - b1HP * tmp2HP + kDC_ADD;
+            out1HP = in1[i] - tmp1HP - kDC_ADD;
+            out2HP = in2[i] - tmp2HP - kDC_ADD;
+
+            out1[i] = (out1LP*lowVol + (in1[i] - out1LP - out1HP)*midVol + out1HP*highVol) * outVol;
+            out2[i] = (out2LP*lowVol + (in2[i] - out2LP - out2HP)*midVol + out2HP*highVol) * outVol;
+        }
+    }
+private:
+    float fLow, fMid, fHigh, fMaster, fLowMidFreq, fMidHighFreq;
+
+    float lowVol, midVol, highVol, outVol;
+    float freqLP, freqHP;
+
+    float xLP, a0LP, b1LP;
+    float xHP, a0HP, b1HP;
+
+    float out1LP, out2LP, out1HP, out2HP;
+    float tmp1LP, tmp2LP, tmp1HP, tmp2HP;
+};
+
+#endif // _EFFECT_3BANDEQ_H