fixes, changes to gitignore

Source/Sampler/LFO.h

@@ -0,0 +1,97 @@
+/*
+  ==============================================================================
+
+    LFO.h
+    Created: 24 Jul 2026
+    Author:  Armin
+
+  ==============================================================================
+*/
+
+#pragma once
+#include <JuceHeader.h>
+
+enum class LFOWaveform : std::uint8_t
+{
+    Sine,
+    Triangle,
+    Saw,
+    Square
+};
+
+/** A simple polyphonic LFO for modulation purposes. Outputs values in [-1, 1]. */
+class ModLFO
+{
+public:
+    void prepare(double newSampleRate)
+    {
+        sampleRate = newSampleRate;
+        phase = 0.f;
+    }
+
+    void setRate(float hz)
+    {
+        rate = hz;
+        if (!synced)
+            currentHz = rate;
+    }
+
+    void setWaveform(LFOWaveform wf) { waveform = wf; }
+
+    void setSync(bool shouldSync, double bpm, int syncDiv)
+    {
+        synced = shouldSync;
+        if (synced && bpm > 0 && syncDiv > 0)
+            currentHz = float(bpm) * float(syncDiv) / (60.f * 4.f);
+        else
+            currentHz = rate;
+    }
+
+    float getNextSample()
+    {
+        float increment = currentHz / float(sampleRate);
+        float value = evaluate(phase);
+
+        phase += increment;
+        if (phase >= 1.f)
+            phase -= 1.f;
+
+        return value;
+    }
+
+    void reset()
+    {
+        phase = 0.f;
+    }
+
+    float getCurrentHz() const { return currentHz; }
+
+private:
+    float evaluate(float p) const
+    {
+        switch (waveform)
+        {
+        case LFOWaveform::Sine:
+            return std::sin(2.f * juce::MathConstants<float>::pi * p);
+
+        case LFOWaveform::Triangle:
+            return 2.f * std::abs(2.f * p - 1.f) - 1.f;
+
+        case LFOWaveform::Saw:
+            return 2.f * p - 1.f;
+
+        case LFOWaveform::Square:
+            return p < 0.5f ? 1.f : -1.f;
+
+        default:
+            return std::sin(2.f * juce::MathConstants<float>::pi * p);
+        }
+    }
+
+    double sampleRate{ 44100 };
+    float phase{ 0.f };
+    float rate{ 1.f };
+    float currentHz{ 1.f };
+    LFOWaveform waveform{ LFOWaveform::Sine };
+    bool synced{ false };
+};