mazbox · July 20, 2020 21:37 · Jul 20, 2020
diff --git a/MyLiveAudio-drum-machine.h b/MyLiveAudio-drum-machine.h
@@ -0,0 +1,65 @@
+#include "LiveAudio.h"
+#include <math.h>
+#include <stdlib.h>
+
+class MyLiveAudio : public LiveAudio {
+public:
+
+	float frac(float f) {
+		return f - (int)f;
+	}
+
+
+	float randf() {
+		return (rand() %10000) / 5000.f - 1.f;
+	}
+
+
+	int pos = 0;
+	float env = 0;
+
+	int beat = 0;
+	float freq = 1;
+
+	float decay = 0.999;
+	float freqDecay = 0.999;
+
+	float noise = 0.f;
+
+	float getSample() {
+		pos++;
+		if(pos>7000) {
+
+			beat = (beat + 1) % 16;
+
+			int seed = 4938 + beat * 151845845845848548584;
+
+			if(frac(seed * 1.3498)<0.5) {
+				env = 1.f;
+				freq = 1 + 3 * (seed %10);
+				decay = 1.f - pow(0.1, 3 + 2*frac(seed * 0.9));
+				freqDecay = 1.f - pow(0.1, 4 + 3*frac(seed * 0.638437));
+				if(frac(seed * 0.384338)>0.5) {
+					freqDecay = 2.f - freqDecay;
+				}
+				noise = 0.5f * (seed & 1);
+			}
+
+			pos = 0;
+		}
+
+		env *= decay;
+		freq *= freqDecay;
+
+		float out = sin(pos*0.01*freq)*(1 - noise) + randf()*noise; 
+		out = tanh(out * 10.f) * 0.4;
+		return env*out;	
+	}
+
+	void audioOut(float *samples, int length, int numChans) override {
+		for(int i = 0; i < length; i++) {
+			samples[i*2] = samples[i*2+1] = getSample();
+
+		}
+	}	
+};