Goldsmiths

2013-03-18 10:51:33 +00:00
parent d938b31e91
commit 05fc0c94af
38 changed files with 152 additions and 1544 deletions
@@ -0,0 +1,36 @@
+// Theremin
+// A: pitch, B: volume
+
+#include <Music.h>
+int xA, xB; //10bit A/D gives 0-1023
+float p; //midi note number 0-127
+double frequency, volume;
+byte c; //print every 256 cycles
+
+void setup(){
+  Music.init();
+  Serial.begin(9600);
+}
+void loop(){
+  xA = analogRead(A3); // A position
+  p = float(xA)/8; //pitch (midi)
+  
+  p = 80.*(p/128.)+20.;
+  // p = map(p, 0,127,20,100);
+  //linear mapping of p
+  //The map() function uses integer math so will
+  //not generate fractions, when the math might
+  //indicate that it should do so. Fractional
+  //remainders are truncated, and are not rounded 
+  //or averaged. 
+  //
+  frequency = pow(2,((p-69.)/12.))*440; //midi 69 -> 440hz
+  Music.setFrequency(frequency);
+  
+  xB = analogRead(A0);
+  volume = -float(xB)/256.; // B position
+  volume = pow(10,volume);
+  Music.setGain(volume);
+  
+}
+