rmx-19/Source/Probe.cpp

// Offline probe: feed the real RMX19AudioProcessor MIDI and analyze output.
#include "PluginProcessor.h"
#include <cmath>
#include <cstdio>
#include <vector>

static int runScenario (int patch,
                        bool holdG,
                        int noteOffCAtBlock,
                        long* cutAt,
                        bool hqOn = false)
{
    RMX19AudioProcessor proc;
    proc.setRateAndBufferSizeDetails (48000.0, 512);
    proc.prepareToPlay (48000.0, 512);
    proc.selectPatch (patch);
    if (hqOn)
        if (auto* h = proc.apvts.getParameter ("hq"))
            h->setValue (1.0f);

    const int C = 60, G = 67;
    const int totalBlocks = 240;
    juce::AudioBuffer<float> buf (2, 512);
    std::vector<float> peak (totalBlocks, 0.0f);

    auto noteOn  = [](int n, float v){ return juce::MidiMessage::noteOn (1, (juce::uint8) n, v); };
    auto noteOff = [](int n){ return juce::MidiMessage::noteOff (1, (juce::uint8) n); };

    for (int b = 0; b < totalBlocks; ++b)
    {
        juce::MidiBuffer midi;
        const int cOn = 0, gOn = 40;   // C held from block 0, G pressed at block 40
        if (b == cOn) midi.addEvent (noteOn (C, 0.8f), 0);
        if (b == gOn) midi.addEvent (noteOn (G, 0.8f), 0);
        if (noteOffCAtBlock >= 0 && b == noteOffCAtBlock) midi.addEvent (noteOff (C), 0);

        buf.clear();
        proc.processBlock (buf, midi);

        float p = 0.0f;
        for (int s = 0; s < 512; ++s)
            p = std::max (p, std::abs (buf.getSample (0, s)));
        peak[b] = p;
    }
    proc.releaseResources();

    // find the first block after G onset where amplitude collapses for a run
    long cmax = 250;
    float gPeak = 0.0f;
    for (int b = 41; b < totalBlocks; ++b) gPeak = std::max (gPeak, peak[b]);
    // detect a "cut": after G onset, a gap where peak < 2% of max for >= 8 blocks
    int run = 0;
    for (int b = 45; b < totalBlocks; ++b)
    {
        if (peak[b] < 0.02f * gPeak + 1e-5f)
        {
            if (++run >= 8)
            {
                cmax = b - run;
                break;
            }
        }
        else run = 0;
    }
    *cutAt = cmax;

    printf ("patch %2d | G peak=%.3f cut-at-block=%s\n", patch, gPeak,
            cmax >= 250 ? "NONE" : std::to_string (cmax).c_str());
    return (int) gPeak;
}

int main()
{
    long cut = -1;
    // patch 18 Strings Ens.: C held, G pressed -> does G survive?
    runScenario (18, true, -1, &cut);
    // same but release C while G is held
    runScenario (18, true, 80, &cut);
    // sanity: a working patch
    runScenario (1, true, -1, &cut);
    runScenario (4, true, -1, &cut);
    runScenario (18, true, -1, &cut, /*hqOn*/ true);

    // cover more held keys after C+G while they are held (fills all 16 voices)
    {
        RMX19AudioProcessor proc;
        proc.setRateAndBufferSizeDetails (48000.0, 512);
        proc.prepareToPlay (48000.0, 512);
        proc.selectPatch (18);
        const int totalBlocks = 240;
        juce::AudioBuffer<float> buf (2, 512);
        std::vector<float> peak (totalBlocks, 0.0f);
        std::vector<float> perBlock (totalBlocks, 1.0f);
        for (int b = 0; b < totalBlocks; ++b)
        {
            juce::MidiBuffer midi;
            if (b == 0)  midi.addEvent (juce::MidiMessage::noteOn (1, 60, 0.8f), 0);
            if (b == 40) midi.addEvent (juce::MidiMessage::noteOn (1, 67, 0.8f), 0);
            // after G, spread another 14 held notes so all 16 voices are busy
            if (b >= 45 && b < 59) midi.addEvent (juce::MidiMessage::noteOn (1, (juce::uint8)(36 + (b - 45)), 0.8f), 0);
            buf.clear();
            proc.processBlock (buf, midi);
            float p = 0.0f;
            for (int s = 0; s < 512; ++s) p = std::max (p, std::abs (buf.getSample (0, s)));
            peak[b] = p;
        }
        // sustain = peak never collapses below 5% of the pre-collapse max for a long stretch
        float m50 = 0.0f;
        for (int b = 41; b < 120; ++b) m50 = std::max (m50, peak[b]);
        int lowRun = 0, maxLowRun = 0;
        for (int b = 60; b < totalBlocks; ++b)
        {
            if (peak[b] < 0.05f * m50) { ++lowRun; maxLowRun = std::max (maxLowRun, lowRun); }
            else lowRun = 0;
        }
        printf ("16-voice fill: block20max=%.3f maxSilentRun=%d blocks  %s\n",
                m50, maxLowRun, maxLowRun >= 12 ? "<- CUT detected" : "sustained");
        proc.releaseResources();
    }
    return 0;
}