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portemento, adsr

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michalcourson
2025-10-25 14:49:02 -04:00
parent 7ba141daed
commit d68a6d5c2a
12 changed files with 2121 additions and 1460 deletions
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2854
Builds/VisualStudio2022/Harmonizer_SharedCode.vcxproj
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172
Builds/VisualStudio2022/Harmonizer_SharedCode.vcxproj.filters
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@ -1,4 +1,5 @@
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@ -684,6 +685,15 @@
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<Filter>JUCE Modules\juce_gui_basics</Filter>
</ClCompile>
<ClCompile Include="..\..\..\..\..\Downloads\JUCE\modules\juce_gui_basics\juce_gui_basics.mm">
<Filter>JUCE Modules\juce_gui_basics</Filter>
</ClCompile>
<ClCompile Include="..\..\..\..\..\Downloads\juce-8.0.4-windows\JUCE\modules\juce_gui_extra\code_editor\juce_CodeDocument.cpp">
<Filter>JUCE Modules\juce_gui_extra\code_editor</Filter>
</ClCompile>
@ -3435,9 +3577,15 @@
<ClCompile Include="..\..\..\..\..\Downloads\juce-8.0.4-windows\JUCE\modules\juce_gui_extra\native\juce_AndroidViewComponent.cpp">
<Filter>JUCE Modules\juce_gui_extra\native</Filter>
</ClCompile>
<ClCompile Include="..\..\..\..\..\Downloads\juce-8.0.4-windows\JUCE\modules\juce_gui_extra\native\juce_AppleRemote_mac.mm">
<Filter>JUCE Modules\juce_gui_extra\native</Filter>
</ClCompile>
<ClCompile Include="..\..\..\..\..\Downloads\juce-8.0.4-windows\JUCE\modules\juce_gui_extra\native\juce_HWNDComponent_windows.cpp">
<Filter>JUCE Modules\juce_gui_extra\native</Filter>
</ClCompile>
<ClCompile Include="..\..\..\..\..\Downloads\juce-8.0.4-windows\JUCE\modules\juce_gui_extra\native\juce_NSViewComponent_mac.mm">
<Filter>JUCE Modules\juce_gui_extra\native</Filter>
</ClCompile>
<ClCompile Include="..\..\..\..\..\Downloads\juce-8.0.4-windows\JUCE\modules\juce_gui_extra\native\juce_PushNotifications_android.cpp">
<Filter>JUCE Modules\juce_gui_extra\native</Filter>
</ClCompile>
@ -3456,12 +3604,18 @@
<ClCompile Include="..\..\..\..\..\Downloads\juce-8.0.4-windows\JUCE\modules\juce_gui_extra\native\juce_SystemTrayIcon_windows.cpp">
<Filter>JUCE Modules\juce_gui_extra\native</Filter>
</ClCompile>
<ClCompile Include="..\..\..\..\..\Downloads\juce-8.0.4-windows\JUCE\modules\juce_gui_extra\native\juce_UIViewComponent_ios.mm">
<Filter>JUCE Modules\juce_gui_extra\native</Filter>
</ClCompile>
<ClCompile Include="..\..\..\..\..\Downloads\juce-8.0.4-windows\JUCE\modules\juce_gui_extra\native\juce_WebBrowserComponent_android.cpp">
<Filter>JUCE Modules\juce_gui_extra\native</Filter>
</ClCompile>
<ClCompile Include="..\..\..\..\..\Downloads\juce-8.0.4-windows\JUCE\modules\juce_gui_extra\native\juce_WebBrowserComponent_linux.cpp">
<Filter>JUCE Modules\juce_gui_extra\native</Filter>
</ClCompile>
<ClCompile Include="..\..\..\..\..\Downloads\juce-8.0.4-windows\JUCE\modules\juce_gui_extra\native\juce_WebBrowserComponent_mac.mm">
<Filter>JUCE Modules\juce_gui_extra\native</Filter>
</ClCompile>
<ClCompile Include="..\..\..\..\..\Downloads\juce-8.0.4-windows\JUCE\modules\juce_gui_extra\native\juce_WebBrowserComponent_windows.cpp">
<Filter>JUCE Modules\juce_gui_extra\native</Filter>
</ClCompile>
@ -3471,6 +3625,9 @@
<ClCompile Include="..\..\..\..\..\Downloads\juce-8.0.4-windows\JUCE\modules\juce_gui_extra\juce_gui_extra.cpp">
<Filter>JUCE Modules\juce_gui_extra</Filter>
</ClCompile>
<ClCompile Include="..\..\..\..\..\Downloads\juce-8.0.4-windows\JUCE\modules\juce_gui_extra\juce_gui_extra.mm">
<Filter>JUCE Modules\juce_gui_extra</Filter>
</ClCompile>
<ClCompile Include="..\..\JuceLibraryCode\BinaryData.cpp">
<Filter>JUCE Library Code</Filter>
</ClCompile>
@ -3533,6 +3690,15 @@
<ClInclude Include="..\..\Source\DemoUtilities.h">
<Filter>Harmonizer\Assets</Filter>
</ClInclude>
<ClInclude Include="..\..\Source\shifter_voice.h">
<Filter>Harmonizer\Source</Filter>
</ClInclude>
<ClInclude Include="..\..\Source\adsr.h">
<Filter>Harmonizer\Source</Filter>
</ClInclude>
<ClInclude Include="..\..\Source\port.h">
<Filter>Harmonizer\Source</Filter>
</ClInclude>
<ClInclude Include="..\..\Source\WebViewPluginDemo.h">
<Filter>Harmonizer\Source</Filter>
</ClInclude>
@ -7592,7 +7758,7 @@
<ClInclude Include="..\..\..\..\..\Downloads\juce-8.0.4-windows\JUCE\modules\juce_gui_extra\native\juce_NSViewFrameWatcher_mac.h">
<Filter>JUCE Modules\juce_gui_extra\native</Filter>
</ClInclude>
<ClInclude Include="..\..\..\..\..\Downloads\juce-8.0.4-windows\JUCE\modules\juce_gui_extra\juce_gui_extra.h">
<ClInclude Include="..\..\..\..\..\Downloads\JUCE\modules\juce_gui_extra\juce_gui_extra.h">
<Filter>JUCE Modules\juce_gui_extra</Filter>
</ClInclude>
<ClInclude Include="..\..\JuceLibraryCode\BinaryData.h">
@ -7681,6 +7847,6 @@
<None Include="..\..\..\..\..\Downloads\JUCE\modules\juce_graphics\unicode\sheenbidi\JUCE_CHANGES.txt">
<Filter>JUCE Modules\juce_graphics\unicode\sheenbidi</Filter>
</None>
<None Include="packages.config" />
<None Include="packages.config"/>
</ItemGroup>
</Project>

7
Harmonizer.jucer
View File

@ -10,6 +10,13 @@
resource="1" file="Assets/webviewplugin-gui-fallback.html"/>
</GROUP>
<GROUP id="{BA45FF6A-23B2-0FFB-BB29-84A581170899}" name="Source">
<FILE id="dgTaja" name="shifter_voice.cpp" compile="1" resource="0"
file="Source/shifter_voice.cpp"/>
<FILE id="clLeAX" name="shifter_voice.h" compile="0" resource="0" file="Source/shifter_voice.h"/>
<FILE id="DEQjrB" name="adsr.cpp" compile="1" resource="0" file="Source/adsr.cpp"/>
<FILE id="RFIuZf" name="adsr.h" compile="0" resource="0" file="Source/adsr.h"/>
<FILE id="cWhO8B" name="port.cpp" compile="1" resource="0" file="Source/port.cpp"/>
<FILE id="WVaJMN" name="port.h" compile="0" resource="0" file="Source/port.h"/>
<FILE id="L2cpEy" name="WebViewPluginDemo.h" compile="0" resource="0"
file="Source/WebViewPluginDemo.h"/>
<FILE id="VXzagW" name="Main.cpp" compile="1" resource="0" file="Source/Main.cpp"/>

71
Source/Shifter.cpp
View File

@ -20,9 +20,9 @@ void Shifter::Init()
volume = 1;
helm.setframesize(1024);
helm.setoverlap(1);
for (int i = 0; i < MAX_VOICES + 1; ++i)
for (int i = 0; i < MAX_VOICES; ++i)
{
out_midi[i] = -1;
voices[i].Init(48000);
}
for (int i = 0; i < BUFFER_SIZE; ++i)
{
@ -33,7 +33,6 @@ void Shifter::Init()
for (int i = 0; i < 8192; ++i) {
cos_lookup[i] = cos(2 * PI_F * i / 8192.0);
}
out_panning[MAX_VOICES] = 0.5f;
}
void Shifter::Process(const float* const* in,
@ -104,22 +103,25 @@ void Shifter::DetectPitch(const float* const* in, float** out, size_t size)
if (midi != last_autotune_midi) {
last_autotune_midi = midi;
out_periods[MAX_VOICES] = in_period;
out_period = in_period;
}
float error = target_out_period - out_periods[MAX_VOICES];
float error = target_out_period - out_period;
float adjustment = error * out_period_filter_amount;
//target_out_period = in_period * out_period_filter_amount + target_out_period * (1 - out_period_filter_amount);
out_midi[MAX_VOICES] = midi;
out_periods[MAX_VOICES] += adjustment;
out_midi = midi;
out_period += adjustment;
}
void Shifter::SetRates() {}
float Shifter::GetOutputEnvelopePeriod(int out_voice) {
if (out_voice >= MAX_VOICES) {
return in_period * formant_preserve + out_period *(1.0 - formant_preserve);
}
//TODO add something so that low pitch ratios end up reducing formant_preservation
return in_period * formant_preserve + out_periods[out_voice] * (1.0 - formant_preserve);
return in_period * formant_preserve + voices[out_voice].CurrentPeriod() * (1.0 - formant_preserve);
}
int Shifter::GetPeakIndex() {
@ -198,8 +200,16 @@ void Shifter::AddInterpolatedFrame(int voice, int max_index, float resampling_pe
float interp = f_index - (int)f_index;
mult = .5 * (1 - cos_lookup[(int)((float)j / (resampling_period * 2.0) * 8191.0)]);
float value = ((1 - interp) * in_buffer[(int)f_index] + (interp)*in_buffer[(int)(f_index + 1) % 8192]) * mult;
out_buffer[0][out_index] += value * (1 - out_panning[voice]);
out_buffer[1][out_index] += value * out_panning[voice];
if(voice >= MAX_VOICES) {
//value *= volume;
out_buffer[0][out_index] += value;
out_buffer[1][out_index] += value;
} else {
value *= voices[voice].CurrentAmplitude() * volume;
out_buffer[0][out_index] += value * voices[voice].GetPanning(0);
out_buffer[1][out_index] += value * voices[voice].GetPanning(1);
}
f_index += period_ratio;
@ -220,13 +230,12 @@ void Shifter::GetSamples(float** output, const float* input, size_t size)
{
//add new samples if necessary
for (int out_p = 0; out_p < MAX_VOICES + 1; ++out_p)
for (int out_p = 0; out_p < MAX_VOICES; ++out_p)
{
if (out_midi[out_p] == -1) continue;
if (out_period_counters[out_p] > out_periods[out_p])
if (!voices[out_p].IsActive()) continue;
voices[out_p].Process();
if (voices[out_p].PeriodOverflow())
{
out_period_counters[out_p] -= out_periods[out_p];
float resampling_period = GetOutputEnvelopePeriod(out_p);
@ -237,6 +246,19 @@ void Shifter::GetSamples(float** output, const float* input, size_t size)
AddInterpolatedFrame(out_p, max_index, resampling_period);
}
}
if (out_period_counter > out_period)
{
out_period_counter -= out_period;
float resampling_period = GetOutputEnvelopePeriod(MAX_VOICES);
//find the start index
int max_index = GetPeakIndex();
//add samples centered on that max
AddInterpolatedFrame(MAX_VOICES, max_index, resampling_period);
}
//add input samples
in_buffer[in_playhead] = input[i];
@ -256,27 +278,20 @@ void Shifter::GetSamples(float** output, const float* input, size_t size)
{
out_playhead -= BUFFER_SIZE;
}
for (int out_p = 0; out_p < MAX_VOICES + 1; ++out_p)
{
if (out_midi[out_p] == -1) continue;
out_period_counters[out_p] += 1;
}
out_period_counter++;
}
}
void Shifter::AddMidiNote(int note) {
for (int i = 0; i < MAX_VOICES; ++i) {
if (out_midi[i] == note) {
if (voices[i].IsActive() && voices[i].GetMidiNote() == note) {
return;
}
}
for (int i = 0; i < MAX_VOICES; ++i) {
if (out_midi[i] == -1) {
out_midi[i] = note;
out_periods[i] = 48000.0f / mtof(note);
out_period_counters[i] = 0;
out_panning[i] = rand() / (float)RAND_MAX;
if (!voices[i].IsActive()) {
voices[i].Trigger(note);
return;
}
}
@ -285,8 +300,8 @@ void Shifter::AddMidiNote(int note) {
void Shifter::RemoveMidiNote(int note) {
for (int i = 0; i < MAX_VOICES; ++i) {
if (out_midi[i] == note) {
out_midi[i] = -1;
if (voices[i].IsActive() && voices[i].GetMidiNote() == note) {
voices[i].Release();
return;
}
}

10
Source/Shifter.h
View File

@ -2,6 +2,7 @@
#define SHIFTER_H
#include "Helmholtz.h"
#include "shifter_voice.h"
#define BUFFER_SIZE 8192
#define MAX_VOICES 12
@ -84,7 +85,7 @@ public:
void SetFormantPreserve(float val) { formant_preserve = val; }
void SetAutoTuneSpeed(float val) { out_period_filter_amount = 1 - val; }
int out_midi[MAX_VOICES + 1] = { -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 };
int out_midi = -1;
private:
void DetectPitch(const float* const* in, float** out, size_t size);
@ -134,10 +135,11 @@ private:
float out_period_filter_amount = 0.7f; // You can expose this as a parameter
float out_periods[MAX_VOICES + 1] = { 0,0,0,0,0,0,0,0,0,0,0,0 }; //C3
float out_panning[MAX_VOICES + 1] = { 0,0,0,0,0,0,0,0,0,0,0,.5 }; //C3
ShifterVoice voices[MAX_VOICES];
float out_period = 0; //C3
float in_period = 366.936;
float out_period_counters[MAX_VOICES + 1] = { 0,0,0,0,0,0,0,0,0,0,0,0 };
float out_period_counter = 0;
float cos_lookup[8192];
};
#endif

4
Source/WebViewPluginDemo.h
View File

@ -288,7 +288,7 @@ WebViewPluginAudioProcessor::WebViewPluginAudioProcessor(AudioProcessorValueTree
void WebViewPluginAudioProcessor::prepareToPlay(double sampleRate, int samplesPerBlock)
{
const auto channels = std::max(getTotalNumInputChannels(), getTotalNumOutputChannels());
shifter.Init();
if (channels == 0)
return;
@ -335,7 +335,7 @@ void WebViewPluginAudioProcessor::processBlock(juce::AudioBuffer<float>& buffer,
{
//DBG(shifter.out_midi[MAX_VOICES]);
//push midi note
spectralBars.push(shifter.out_midi[MAX_VOICES]);
//spectralBars.push(shifter.out_midi[MAX_VOICES]);
const SpinLock::ScopedTryLockType lock(spectrumDataLock);
if (!lock.isLocked())

148
Source/adsr.cpp Normal file
View File

@ -0,0 +1,148 @@
/*
==============================================================================
adsr.cpp
Created: 25 Oct 2025 2:09:32pm
Author: mickl
==============================================================================
*/
#include "adsr.h"
#include "math.h"
#ifndef M_E
#define M_E 2.71828182845904523536
#endif
void Adsr::Init(float sample_rate, int blockSize)
{
sample_rate_ = sample_rate / blockSize;
attackShape_ = -1.f;
attackTarget_ = 0.0f;
attackTime_ = -1.f;
decayTime_ = -1.f;
releaseTime_ = -1.f;
sus_level_ = 0.7f;
x_ = 0.0f;
gate_ = false;
mode_ = ADSR_SEG_IDLE;
SetTime(ADSR_SEG_ATTACK, 0.1f);
SetTime(ADSR_SEG_DECAY, 0.1f);
SetTime(ADSR_SEG_RELEASE, 0.1f);
}
void Adsr::Retrigger(bool hard)
{
mode_ = ADSR_SEG_ATTACK;
if (hard)
x_ = 0.f;
}
void Adsr::SetTime(int seg, float time)
{
switch (seg)
{
case ADSR_SEG_ATTACK: SetAttackTime(time, 0.0f); break;
case ADSR_SEG_DECAY:
{
SetTimeConstant(time, decayTime_, decayD0_);
}
break;
case ADSR_SEG_RELEASE:
{
SetTimeConstant(time, releaseTime_, releaseD0_);
}
break;
default: return;
}
}
void Adsr::SetAttackTime(float timeInS, float shape)
{
if ((timeInS != attackTime_) || (shape != attackShape_))
{
attackTime_ = timeInS;
attackShape_ = shape;
if (timeInS > 0.f)
{
float x = shape;
float target = 9.f * powf(x, 10.f) + 0.3f * x + 1.01f;
attackTarget_ = target;
float logTarget = logf(1.f - (1.f / target)); // -1 for decay
attackD0_ = 1.f - expf(logTarget / (timeInS * sample_rate_));
}
else
attackD0_ = 1.f; // instant change
}
}
void Adsr::SetDecayTime(float timeInS)
{
SetTimeConstant(timeInS, decayTime_, decayD0_);
}
void Adsr::SetReleaseTime(float timeInS)
{
SetTimeConstant(timeInS, releaseTime_, releaseD0_);
}
void Adsr::SetTimeConstant(float timeInS, float& time, float& coeff)
{
if (timeInS != time)
{
time = timeInS;
if (time > 0.f)
{
const float target = logf(1. / M_E);
coeff = 1.f - expf(target / (time * sample_rate_));
}
else
coeff = 1.f; // instant change
}
}
float Adsr::Process(bool gate)
{
float out = 0.0f;
if (gate && !gate_) // rising edge
mode_ = ADSR_SEG_ATTACK;
else if (!gate && gate_) // falling edge
mode_ = ADSR_SEG_RELEASE;
gate_ = gate;
float D0(attackD0_);
if (mode_ == ADSR_SEG_DECAY)
D0 = decayD0_;
else if (mode_ == ADSR_SEG_RELEASE)
D0 = releaseD0_;
float target = mode_ == ADSR_SEG_DECAY ? sus_level_ : -0.01f;
switch (mode_)
{
case ADSR_SEG_IDLE: out = 0.0f; break;
case ADSR_SEG_ATTACK:
x_ += D0 * (attackTarget_ - x_);
out = x_;
if (out > 1.f)
{
x_ = out = 1.f;
mode_ = ADSR_SEG_DECAY;
}
break;
case ADSR_SEG_DECAY:
case ADSR_SEG_RELEASE:
x_ += D0 * (target - x_);
out = x_;
if (out < 0.0f)
{
x_ = out = 0.f;
mode_ = ADSR_SEG_IDLE;
}
default: break;
}
return out;
}

98
Source/adsr.h Normal file
View File

@ -0,0 +1,98 @@
/*
==============================================================================
adsr.h
Created: 25 Oct 2025 2:09:32pm
Author: mickl
==============================================================================
*/
#pragma once
#include <stdint.h>
/** Distinct stages that the phase of the envelope can be located in.
- IDLE = located at phase location 0, and not currently running
- ATTACK = First segment of envelope where phase moves from 0 to 1
- DECAY = Second segment of envelope where phase moves from 1 to SUSTAIN value
- RELEASE = Fourth segment of envelop where phase moves from SUSTAIN to 0
*/
enum
{
ADSR_SEG_IDLE = 0,
ADSR_SEG_ATTACK = 1,
ADSR_SEG_DECAY = 2,
ADSR_SEG_RELEASE = 4
};
/** adsr envelope module
Original author(s) : Paul Batchelor
Ported from Soundpipe by Ben Sergentanis, May 2020
Remake by Steffan DIedrichsen, May 2021
*/
class Adsr
{
public:
Adsr() {}
~Adsr() {}
/** Initializes the Adsr module.
\param sample_rate - The sample rate of the audio engine being run.
*/
void Init(float sample_rate, int blockSize = 1);
/**
\function Retrigger forces the envelope back to attack phase
\param hard resets the history to zero, results in a click.
*/
void Retrigger(bool hard);
/** Processes one sample through the filter and returns one sample.
\param gate - trigger the envelope, hold it to sustain
*/
float Process(bool gate);
/** Sets time
Set time per segment in seconds
*/
void SetTime(int seg, float time);
void SetAttackTime(float timeInS, float shape = 0.0f);
void SetDecayTime(float timeInS);
void SetReleaseTime(float timeInS);
private:
void SetTimeConstant(float timeInS, float& time, float& coeff);
public:
/** Sustain level
\param sus_level - sets sustain level, 0...1.0
*/
inline void SetSustainLevel(float sus_level)
{
sus_level = (sus_level <= 0.f) ? -0.01f // forces envelope into idle
: (sus_level > 1.f) ? 1.f : sus_level;
sus_level_ = sus_level;
}
/** get the current envelope segment
\return the segment of the envelope that the phase is currently located in.
*/
inline uint8_t GetCurrentSegment() { return mode_; }
/** Tells whether envelope is active
\return true if the envelope is currently in any stage apart from idle.
*/
inline bool IsRunning() const { return mode_ != ADSR_SEG_IDLE; }
private:
float sus_level_{ 0.f };
float x_{ 0.f };
float attackShape_{ -1.f };
float attackTarget_{ 0.0f };
float attackTime_{ -1.0f };
float decayTime_{ -1.0f };
float releaseTime_{ -1.0f };
float attackD0_{ 0.f };
float decayD0_{ 0.f };
float releaseD0_{ 0.f };
int sample_rate_;
uint8_t mode_{ ADSR_SEG_IDLE };
bool gate_{ false };
};

34
Source/port.cpp Normal file
View File

@ -0,0 +1,34 @@
/*
==============================================================================
port.cpp
Created: 25 Oct 2025 2:09:16pm
Author: mickl
==============================================================================
*/
#include "port.h"
#include "math.h"
void Port::Init(float sample_rate, float htime)
{
yt1_ = 0;
prvhtim_ = -100.0;
htime_ = htime;
sample_rate_ = sample_rate;
onedsr_ = 1.0 / sample_rate_;
}
float Port::Process(float in)
{
if (prvhtim_ != htime_)
{
c2_ = powf(0.5, onedsr_ / htime_);
c1_ = 1.0 - c2_;
prvhtim_ = htime_;
}
return yt1_ = c1_ * in + c2_ * yt1_;
}

42
Source/port.h Normal file
View File

@ -0,0 +1,42 @@
/*
==============================================================================
port.h
Created: 25 Oct 2025 2:09:16pm
Author: mickl
==============================================================================
*/
#pragma once
class Port
{
public:
Port() {}
~Port() {}
/** Initializes Port module
\param sample_rate: sample rate of audio engine
\param htime: half-time of the function, in seconds.
*/
void Init(float sample_rate, float htime);
/** Applies portamento to input signal and returns processed signal.
\return slewed output signal
*/
float Process(float in);
/** Sets htime
*/
inline void SetHtime(float htime) { htime_ = htime; }
/** returns current value of htime
*/
inline float GetHtime() { return htime_; }
private:
float htime_;
float c1_, c2_, yt1_, prvhtim_;
float sample_rate_, onedsr_;
};

91
Source/shifter_voice.cpp Normal file
View File

@ -0,0 +1,91 @@
/*
==============================================================================
shifter_voice.cpp
Created: 25 Oct 2025 2:09:42pm
Author: mickl
==============================================================================
*/
#include "shifter_voice.h"
static inline float mtof(float m)
{
return powf(2, (m - 69.0f) / 12.0f) * 440.0f;
}
void ShifterVoice::Init(float sample_rate) {
portamento_.Init(sample_rate, 0.05f); //default portamento time
amplitude_envelope_.Init(sample_rate);
amplitude_envelope_.SetAttackTime(0.2f);
amplitude_envelope_.SetDecayTime(0.2f);
amplitude_envelope_.SetReleaseTime(1.0f);
onoff_ = false;
overflow_ = false;
current_midi = 60;
current_period_ = 48000.0f / mtof((float)current_midi);
current_amplitude = 0.0f;
period_counter = 0.0f;
panning = 0.5f;
}
bool ShifterVoice::IsActive() { return amplitude_envelope_.IsRunning(); }
void ShifterVoice::Trigger(int midi_note) {
current_midi = midi_note;
// Retrigger envelope
amplitude_envelope_.Retrigger(false);
onoff_ = true;
panning = rand() / (float)RAND_MAX;
}
void ShifterVoice::Release() {
onoff_ = false;
}
void ShifterVoice::Process() {
current_amplitude = amplitude_envelope_.Process(onoff_);
current_period_ = 48000.0f / mtof(portamento_.Process((float)current_midi));
period_counter++;
overflow_ = period_counter >= current_period_;
if (overflow_) {
period_counter -= current_period_;
}
}
float ShifterVoice::CurrentAmplitude() {
return current_amplitude;
}
float ShifterVoice::CurrentPeriod() {
return current_period_;
}
bool ShifterVoice::PeriodOverflow() {
return overflow_;
}
void ShifterVoice::SetPortamentoTime(float time) {
portamento_.SetHtime(time);
}
void ShifterVoice::SetAdsrTimes(float attack, float decay, float release) {
amplitude_envelope_.SetAttackTime(attack);
amplitude_envelope_.SetDecayTime(decay);
amplitude_envelope_.SetReleaseTime(release);
amplitude_envelope_.SetSustainLevel(1.0);
}
float ShifterVoice::GetPanning(int channel) const {
switch (channel) {
default:
case 0:
return panning < .5 ? 1.0 : 2.0f - (panning * 2.0f);
case 1:
return panning > .5 ? 1.0 : panning * 2.0f;
}
}

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/*
==============================================================================
shifter_voice.h
Created: 25 Oct 2025 2:09:42pm
Author: mickl
==============================================================================
*/
#pragma once
#include "adsr.h"
#include "port.h"
#include "math.h"
#include <juce_core/juce_core.h>
#include <stdlib.h>
class ShifterVoice {
public:
ShifterVoice() {}
~ShifterVoice() {}
void Init(float sample_rate);
bool IsActive();
void Trigger(int midi_note);
void Release();
void Process();
float CurrentAmplitude();
float CurrentPeriod();
bool PeriodOverflow();
void SetPortamentoTime(float time);
void SetAdsrTimes(float attack, float decay, float release);
float GetPanning(int channel) const;
int GetMidiNote() const { return current_midi; }
private:
Port portamento_;
Adsr amplitude_envelope_;
bool onoff_;
bool overflow_;
int current_midi;
float current_period_;
float current_amplitude;
float period_counter;
float panning;
};