510 lines
22 KiB
C++
510 lines
22 KiB
C++
#include "SynthVoice.h"
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#include <cmath>
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//==============================================================================
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NeuralSynthVoice::NeuralSynthVoice (NeuralSharedParams& sp)
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: shared (sp) {}
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//==============================================================================
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void NeuralSynthVoice::prepare (const juce::dsp::ProcessSpec& newSpec)
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{
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spec = newSpec;
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// --- Oscillator
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osc.prepare (spec.sampleRate);
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osc.setWave (BlepWave::Sine);
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// --- Wavetable oscillator factory banks ---
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wtOsc.prepare (spec.sampleRate);
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morphLfo.prepare (spec.sampleRate);
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currentWtBankIndex = -1;
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wtOsc2.prepare (spec.sampleRate);
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morphLfo2.prepare (spec.sampleRate);
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currentWtBankIndex2 = -1;
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const auto& library = WT::FactoryLibrary::get();
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if (! library.empty())
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{
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wtOsc.setBank (library.front().bank);
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currentWtBankIndex = 0;
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wtOsc2.setBank (library.front().bank);
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currentWtBankIndex2 = 0;
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}
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// --- Scratch buffer (IMPORTANT: allocate real memory)
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tempBuffer.setSize ((int) spec.numChannels, (int) spec.maximumBlockSize,
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false, false, true);
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tempBlock = juce::dsp::AudioBlock<float> (tempBuffer);
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// --- Prepare chain elements
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chain.prepare (spec);
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chain.get<masterIndex>().setRampDurationSeconds (0.02f);
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chain.get<limiterIndex>().setThreshold (-1.0f);
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chain.get<limiterIndex>().setRelease (0.05f);
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chain.get<limiterIndex>().reset();
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// Set maximum delay sizes BEFORE runtime changes
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{
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// Flanger: up to 20 ms
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auto& flanger = chain.get<flangerIndex>();
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const size_t maxFlangerDelay = (size_t) juce::jmax<size_t>(
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1, (size_t) std::ceil (0.020 * spec.sampleRate));
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flanger.setMaximumDelayInSamples (maxFlangerDelay);
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flanger.reset();
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}
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{
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// Simple delay: up to 2 s
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auto& delay = chain.get<delayIndex>();
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const size_t maxDelay = (size_t) juce::jmax<size_t>(
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1, (size_t) std::ceil (2.0 * spec.sampleRate));
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delay.setMaximumDelayInSamples (maxDelay);
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delay.reset();
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}
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// Envelopes
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adsr.setSampleRate (spec.sampleRate);
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filterAdsr.setSampleRate (spec.sampleRate);
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// Filter
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svf.reset();
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svf.prepare (spec);
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// Initial filter type
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const int type = (int) std::lround (juce::jlimit (0.0f, 2.0f,
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shared.filterType ? shared.filterType->load() : 0.0f));
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switch (type)
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{
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case 0: svf.setType (juce::dsp::StateVariableTPTFilterType::lowpass); break;
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case 1: svf.setType (juce::dsp::StateVariableTPTFilterType::highpass); break;
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case 2: svf.setType (juce::dsp::StateVariableTPTFilterType::bandpass); break;
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default: break;
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}
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}
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//==============================================================================
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void NeuralSynthVoice::renderNextBlock (juce::AudioBuffer<float>& outputBuffer,
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int startSample, int numSamples)
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{
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if (numSamples <= 0)
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return;
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if (! adsr.isActive())
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clearCurrentNote();
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// --- Generate oscillator into temp buffer (BLEP or Wavetable)
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tempBuffer.clear();
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const int numCh = juce::jmin ((int) spec.numChannels, tempBuffer.getNumChannels());
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const auto& library = WT::FactoryLibrary::get();
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const int librarySize = (int) library.size();
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if (librarySize > 0 && shared.wtBank)
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{
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const int targetBank = juce::jlimit (0, librarySize - 1,
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(int) std::lround (shared.wtBank->load()));
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if (targetBank != currentWtBankIndex)
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{
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wtOsc.setBank (library[(size_t) targetBank].bank);
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currentWtBankIndex = targetBank;
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}
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}
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if (librarySize > 0 && shared.wt2Bank)
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{
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const int targetBank2 = juce::jlimit (0, librarySize - 1,
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(int) std::lround (shared.wt2Bank->load()));
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if (targetBank2 != currentWtBankIndex2)
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{
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wtOsc2.setBank (library[(size_t) targetBank2].bank);
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currentWtBankIndex2 = targetBank2;
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}
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}
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const bool useWTLayerA = (shared.wtOn && shared.wtOn->load() > 0.5f)
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&& wtOsc.getFrameCount() > 0;
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const bool useWTLayerB = (shared.wt2On && shared.wt2On->load() > 0.5f)
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&& wtOsc2.getFrameCount() > 0;
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const float morphMaxA = wtOsc.getMaxMorph();
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const float morphBaseA = shared.wtMorph
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? juce::jlimit (0.0f, morphMaxA, shared.wtMorph->load())
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: 0.0f;
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const float lfoDepthA = shared.wtLfoDepth ? shared.wtLfoDepth->load() : 0.0f;
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const float lfoRateA = shared.wtLfoRate ? shared.wtLfoRate->load() : 1.0f;
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const int lfoShapeA = shared.wtLfoShape ? (int) std::lround (shared.wtLfoShape->load()) : 0;
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morphLfo.setRate (lfoRateA);
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morphLfo.setShape (lfoShapeA);
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const float depthFramesA = juce::jlimit (0.0f, morphMaxA, lfoDepthA);
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const float morphMaxB = wtOsc2.getMaxMorph();
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const float morphBaseB = shared.wt2Morph
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? juce::jlimit (0.0f, morphMaxB, shared.wt2Morph->load())
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: 0.0f;
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const float lfoDepthB = shared.wt2LfoDepth ? shared.wt2LfoDepth->load() : 0.0f;
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const float lfoRateB = shared.wt2LfoRate ? shared.wt2LfoRate->load() : 0.3f;
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const int lfoShapeB = shared.wt2LfoShape ? (int) std::lround (shared.wt2LfoShape->load()) : 0;
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morphLfo2.setRate (lfoRateB);
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morphLfo2.setShape (lfoShapeB);
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const float depthFramesB = juce::jlimit (0.0f, morphMaxB, lfoDepthB);
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const float levelA = shared.wtLevel ? juce::jlimit (0.0f, 1.0f, shared.wtLevel->load()) : 0.0f;
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const float levelB = shared.wt2Level ? juce::jlimit (0.0f, 1.0f, shared.wt2Level->load()) : 0.0f;
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const float safeLevelSum = juce::jlimit (0.5f, 2.0f, levelA + levelB + 0.0001f);
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const float mixGain = 0.45f / safeLevelSum;
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for (int i = 0; i < numSamples; ++i)
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{
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float sampleA = useWTLayerA ? 0.0f : osc.process();
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if (useWTLayerA)
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{
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const float lfoValueA = morphLfo.process();
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const float headroomNegA = juce::jmin (depthFramesA, morphBaseA);
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const float headroomPosA = juce::jmin (depthFramesA, morphMaxA - morphBaseA);
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const float offsetA = (lfoValueA >= 0.0f ? lfoValueA * headroomPosA
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: lfoValueA * headroomNegA);
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const float morphValueA = juce::jlimit (0.0f, morphMaxA, morphBaseA + offsetA);
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sampleA = wtOsc.process (morphValueA);
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}
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else
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{
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morphLfo.process(); // advance for consistency
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}
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float sampleB = 0.0f;
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if (useWTLayerB)
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{
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const float lfoValueB = morphLfo2.process();
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const float headroomNegB = juce::jmin (depthFramesB, morphBaseB);
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const float headroomPosB = juce::jmin (depthFramesB, morphMaxB - morphBaseB);
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const float offsetB = (lfoValueB >= 0.0f ? lfoValueB * headroomPosB
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: lfoValueB * headroomNegB);
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const float morphValueB = juce::jlimit (0.0f, morphMaxB, morphBaseB + offsetB);
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sampleB = wtOsc2.process (morphValueB);
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}
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else
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{
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morphLfo2.process();
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}
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const float combined = mixGain * ((sampleA * levelA) + (sampleB * levelB));
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for (int ch = 0; ch < numCh; ++ch)
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tempBuffer.getWritePointer (ch)[i] = combined;
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}
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auto block = tempBlock.getSubBlock (0, (size_t) numSamples);
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// ================================================================
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// Flanger (pre-filter) – manual per-sample to set varying delay
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// ================================================================
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{
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auto& flanger = chain.get<flangerIndex>();
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const bool enabled = shared.flangerOn && shared.flangerOn->load() > 0.5f;
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if (enabled)
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{
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const float rate = shared.flangerRate ? shared.flangerRate->load() : 0.0f;
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float lfoPhase = shared.flangerPhase ? shared.flangerPhase->load() : 0.0f;
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const float flangerDepth = shared.flangerDepth ? shared.flangerDepth->load() : 0.0f; // ms
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const float mix = shared.flangerDryMix ? shared.flangerDryMix->load() : 0.0f;
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const float feedback = shared.flangerFeedback ? shared.flangerFeedback->load() : 0.0f;
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const float baseDelayMs = shared.flangerDelay ? shared.flangerDelay->load() : 0.25f;
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for (int i = 0; i < numSamples; ++i)
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{
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const float in = tempBuffer.getReadPointer (0)[i];
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const float lfo = std::sin (lfoPhase);
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const float delayMs = baseDelayMs + 0.5f * (1.0f + lfo) * flangerDepth;
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const float delaySamples = juce::jmax (0.0f, delayMs * 0.001f * (float) spec.sampleRate);
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flanger.setDelay (delaySamples);
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const float delayed = flanger.popSample (0);
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flanger.pushSample (0, in + delayed * feedback);
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const float out = in * (1.0f - mix) + delayed * mix;
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for (int ch = 0; ch < numCh; ++ch)
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tempBuffer.getWritePointer (ch)[i] = out;
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lfoPhase += juce::MathConstants<float>::twoPi * rate / (float) spec.sampleRate;
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if (lfoPhase > juce::MathConstants<float>::twoPi)
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lfoPhase -= juce::MathConstants<float>::twoPi;
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}
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}
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}
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// ================================================================
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// Filter with per-sample ADSR modulation (poly)
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// ================================================================
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{
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const bool enabled = shared.filterOn && shared.filterOn->load() > 0.5f;
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// Update filter type every block (cheap)
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const int ftype = (int) std::lround (juce::jlimit (0.0f, 2.0f,
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shared.filterType ? shared.filterType->load() : 0.0f));
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switch (ftype)
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{
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case 0: svf.setType (juce::dsp::StateVariableTPTFilterType::lowpass); break;
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case 1: svf.setType (juce::dsp::StateVariableTPTFilterType::highpass); break;
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case 2: svf.setType (juce::dsp::StateVariableTPTFilterType::bandpass); break;
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default: break;
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}
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const float qOrRes = juce::jlimit (0.1f, 10.0f,
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shared.filterResonance ? shared.filterResonance->load() : 0.7f);
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svf.setResonance (qOrRes);
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const float baseCutoff = juce::jlimit (20.0f, 20000.0f,
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shared.filterCutoff ? shared.filterCutoff->load() : 1000.0f);
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const float envAmt = shared.fenvAmount ? shared.fenvAmount->load() : 0.0f;
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for (int i = 0; i < numSamples; ++i)
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{
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const float envVal = filterAdsr.getNextSample();
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const float cutoff = juce::jlimit (20.0f, 20000.0f,
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baseCutoff * std::pow (2.0f, envAmt * envVal));
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svf.setCutoffFrequency (cutoff);
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if (enabled)
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{
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for (int ch = 0; ch < numCh; ++ch)
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{
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float x = tempBuffer.getSample (ch, i);
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x = svf.processSample (ch, x);
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tempBuffer.setSample (ch, i, x);
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}
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}
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}
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}
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// ================================================================
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// Chorus
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// ================================================================
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if (shared.chorusOn && shared.chorusOn->load() > 0.5f)
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{
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auto& chorus = chain.get<chorusIndex>();
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if (shared.chorusCentre) chorus.setCentreDelay (shared.chorusCentre->load());
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if (shared.chorusDepth) chorus.setDepth (shared.chorusDepth->load());
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if (shared.chorusFeedback) chorus.setFeedback (shared.chorusFeedback->load());
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if (shared.chorusMix) chorus.setMix (shared.chorusMix->load());
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if (shared.chorusRate) chorus.setRate (shared.chorusRate->load());
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chain.get<chorusIndex>().process (juce::dsp::ProcessContextReplacing<float> (block));
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}
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// ================================================================
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// Simple Delay (per-voice)
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// ================================================================
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if (shared.delayOn && shared.delayOn->load() > 0.5f)
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{
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auto& delay = chain.get<delayIndex>();
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const float time = shared.delayTime ? shared.delayTime->load() : 0.1f;
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delay.setDelay (juce::jmax (0.0f, time * (float) spec.sampleRate));
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delay.process (juce::dsp::ProcessContextReplacing<float> (block));
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}
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// ================================================================
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// Reverb
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// ================================================================
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if (shared.reverbOn && shared.reverbOn->load() > 0.5f)
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{
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juce::Reverb::Parameters rp;
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rp.damping = shared.reverbDamping ? shared.reverbDamping->load() : 0.0f;
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rp.dryLevel = shared.reverbDryLevel ? shared.reverbDryLevel->load() : 0.0f;
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rp.freezeMode = shared.reverbFreezeMode ? shared.reverbFreezeMode->load() : 0.0f;
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rp.roomSize = shared.reverbRoomSize ? shared.reverbRoomSize->load() : 0.0f;
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rp.wetLevel = shared.reverbWetLevel ? shared.reverbWetLevel->load() : 0.0f;
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rp.width = shared.reverbWidth ? shared.reverbWidth->load() : 0.0f;
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chain.get<reverbIndex>().setParameters (rp);
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chain.get<reverbIndex>().process (juce::dsp::ProcessContextReplacing<float> (block));
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}
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// ================================================================
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// Distortion + tone (post LPF/Peak)
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// ================================================================
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{
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const float driveDb = shared.distortionDrive ? shared.distortionDrive->load() : 0.0f;
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const float bias = juce::jlimit (-1.0f, 1.0f, shared.distortionBias ? shared.distortionBias->load() : 0.0f);
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const float toneHz = juce::jlimit (100.0f, 8000.0f, shared.distortionTone ? shared.distortionTone->load() : 3000.0f);
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const int shape = (int) std::lround (juce::jlimit (0.0f, 2.0f,
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shared.distortionShape ? shared.distortionShape->load() : 0.0f));
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const float mix = shared.distortionMix ? shared.distortionMix->load() : 0.0f;
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auto& pre = chain.get<distortionPreGain>();
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auto& sh = chain.get<distortionIndex>();
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auto& tone = chain.get<distortionPostLPF>();
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pre.setGainDecibels (driveDb);
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// Explicit std::function target (works on MSVC)
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if (shape == 0) sh.functionToUse = std::function<float(float)>{ [bias](float x) noexcept { return std::tanh (x + bias); } };
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else if (shape == 1) sh.functionToUse = std::function<float(float)>{ [bias](float x) noexcept { return juce::jlimit (-1.0f, 1.0f, x + bias); } };
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else sh.functionToUse = std::function<float(float)>{ [bias](float x) noexcept { return std::atan (x + bias) * (2.0f / juce::MathConstants<float>::pi); } };
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tone.coefficients = juce::dsp::IIR::Coefficients<float>::makePeakFilter (
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spec.sampleRate, toneHz, 0.707f,
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juce::Decibels::decibelsToGain (shared.highGainDbls ? shared.highGainDbls->load() : 0.0f));
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if (shared.distortionOn && shared.distortionOn->load() > 0.5f)
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{
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// Wet/dry blend around the shaper
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juce::AudioBuffer<float> dryCopy (tempBuffer.getNumChannels(), numSamples);
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for (int ch = 0; ch < numCh; ++ch)
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dryCopy.copyFrom (ch, 0, tempBuffer, ch, 0, numSamples);
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// pre -> shaper -> tone
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pre.process (juce::dsp::ProcessContextReplacing<float> (block));
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sh.process (juce::dsp::ProcessContextReplacing<float> (block));
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tone.process (juce::dsp::ProcessContextReplacing<float> (block));
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const float wet = mix, dry = 1.0f - mix;
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for (int ch = 0; ch < numCh; ++ch)
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{
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auto* d = dryCopy.getReadPointer (ch);
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auto* w = tempBuffer.getWritePointer (ch);
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for (int i = 0; i < numSamples; ++i)
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w[i] = dry * d[i] + wet * w[i];
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}
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}
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}
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// ================================================================
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// EQ + Master + Limiter (EQ guarded by eqOn)
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// ================================================================
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{
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const bool eqEnabled = shared.eqOn && shared.eqOn->load() > 0.5f;
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auto& eqL = chain.get<eqLowIndex>();
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auto& eqM = chain.get<eqMidIndex>();
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auto& eqH = chain.get<eqHighIndex>();
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if (eqEnabled)
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{
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eqL.coefficients = juce::dsp::IIR::Coefficients<float>::makeLowShelf (
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spec.sampleRate, 100.0f, 0.707f,
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juce::Decibels::decibelsToGain (shared.lowGainDbls ? shared.lowGainDbls->load() : 0.0f));
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eqM.coefficients = juce::dsp::IIR::Coefficients<float>::makePeakFilter (
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spec.sampleRate, 1000.0f, 1.0f,
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juce::Decibels::decibelsToGain (shared.midGainDbls ? shared.midGainDbls->load() : 0.0f));
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eqH.coefficients = juce::dsp::IIR::Coefficients<float>::makePeakFilter (
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spec.sampleRate, 10000.0f, 0.707f,
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juce::Decibels::decibelsToGain (shared.highGainDbls ? shared.highGainDbls->load() : 0.0f));
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eqL.process (juce::dsp::ProcessContextReplacing<float> (block));
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eqM.process (juce::dsp::ProcessContextReplacing<float> (block));
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eqH.process (juce::dsp::ProcessContextReplacing<float> (block));
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}
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chain.get<masterIndex>().setGainDecibels (shared.masterDbls ? shared.masterDbls->load() : 0.0f);
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chain.get<masterIndex>().process (juce::dsp::ProcessContextReplacing<float> (block));
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chain.get<limiterIndex>().process (juce::dsp::ProcessContextReplacing<float> (block));
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}
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// ================================================================
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// Apply AMP ADSR envelope
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// ================================================================
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{
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juce::AudioBuffer<float> buf (tempBuffer.getArrayOfWritePointers(), numCh, numSamples);
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adsr.applyEnvelopeToBuffer (buf, 0, numSamples);
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}
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// Mix into output
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juce::dsp::AudioBlock<float> (outputBuffer)
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.getSubBlock ((size_t) startSample, (size_t) numSamples)
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.add (block);
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||
}
|
||
|
||
//==============================================================================
|
||
|
||
void NeuralSynthVoice::noteStarted()
|
||
{
|
||
const float freqHz = (float) getCurrentlyPlayingNote().getFrequencyInHertz();
|
||
const float initPhase = shared.wtPhase
|
||
? juce::jlimit (0.0f, 1.0f, shared.wtPhase->load())
|
||
: 0.0f;
|
||
|
||
// Oscillator frequency and phase retrigger (BLEP + WT)
|
||
osc.setFrequency (freqHz);
|
||
osc.resetPhase (initPhase);
|
||
wtOsc.setFrequency (freqHz);
|
||
wtOsc.resetPhase (initPhase);
|
||
morphLfo.reset();
|
||
const float initPhaseB = shared.wt2Phase
|
||
? juce::jlimit (0.0f, 1.0f, shared.wt2Phase->load())
|
||
: initPhase;
|
||
wtOsc2.setFrequency (freqHz);
|
||
wtOsc2.resetPhase (initPhaseB);
|
||
morphLfo2.reset();
|
||
|
||
// Chorus snapshot
|
||
if (shared.chorusCentre) chain.get<chorusIndex>().setCentreDelay (shared.chorusCentre->load());
|
||
if (shared.chorusDepth) chain.get<chorusIndex>().setDepth (shared.chorusDepth->load());
|
||
if (shared.chorusFeedback) chain.get<chorusIndex>().setFeedback (shared.chorusFeedback->load());
|
||
if (shared.chorusMix) chain.get<chorusIndex>().setMix (shared.chorusMix->load());
|
||
if (shared.chorusRate) chain.get<chorusIndex>().setRate (shared.chorusRate->load());
|
||
|
||
// Delay time (in samples)
|
||
if (shared.delayTime)
|
||
chain.get<delayIndex>().setDelay (juce::jmax (0.0f, shared.delayTime->load() * (float) spec.sampleRate));
|
||
|
||
// Reverb snapshot
|
||
juce::Reverb::Parameters rp;
|
||
rp.damping = shared.reverbDamping ? shared.reverbDamping->load() : 0.0f;
|
||
rp.dryLevel = shared.reverbDryLevel ? shared.reverbDryLevel->load() : 0.0f;
|
||
rp.freezeMode = shared.reverbFreezeMode ? shared.reverbFreezeMode->load() : 0.0f;
|
||
rp.roomSize = shared.reverbRoomSize ? shared.reverbRoomSize->load() : 0.0f;
|
||
rp.wetLevel = shared.reverbWetLevel ? shared.reverbWetLevel->load() : 0.0f;
|
||
rp.width = shared.reverbWidth ? shared.reverbWidth->load() : 0.0f;
|
||
chain.get<reverbIndex>().setParameters (rp);
|
||
|
||
// Amp ADSR
|
||
juce::ADSR::Parameters ap;
|
||
ap.attack = shared.adsrAttack ? shared.adsrAttack->load() : 0.01f;
|
||
ap.decay = shared.adsrDecay ? shared.adsrDecay->load() : 0.10f;
|
||
ap.sustain = shared.adsrSustain ? shared.adsrSustain->load() : 0.80f;
|
||
ap.release = shared.adsrRelease ? shared.adsrRelease->load() : 0.40f;
|
||
adsr.setParameters (ap);
|
||
adsr.noteOn();
|
||
|
||
// Filter ADSR
|
||
juce::ADSR::Parameters fp;
|
||
fp.attack = shared.fenvAttack ? shared.fenvAttack->load() : 0.01f;
|
||
fp.decay = shared.fenvDecay ? shared.fenvDecay->load() : 0.10f;
|
||
fp.sustain = shared.fenvSustain ? shared.fenvSustain->load() : 0.80f;
|
||
fp.release = shared.fenvRelease ? shared.fenvRelease->load() : 0.40f;
|
||
filterAdsr.setParameters (fp);
|
||
filterAdsr.noteOn();
|
||
}
|
||
|
||
//==============================================================================
|
||
|
||
void NeuralSynthVoice::notePitchbendChanged()
|
||
{
|
||
const float freqHz = (float) getCurrentlyPlayingNote().getFrequencyInHertz();
|
||
osc.setFrequency (freqHz);
|
||
wtOsc.setFrequency (freqHz);
|
||
}
|
||
|
||
//==============================================================================
|
||
|
||
void NeuralSynthVoice::noteStopped (bool allowTailOff)
|
||
{
|
||
juce::ignoreUnused (allowTailOff);
|
||
adsr.noteOff();
|
||
filterAdsr.noteOff();
|
||
}
|
||
|
||
//==============================================================================
|