Committing individual examples instead of one .zip

build/shared/dist/examples/pwm_sound/keyboard_serial/keyboard_serial.pde

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+/* Keyboard Serial
+ * ----------------
+ *
+ * Program to play tones depending on the
+ * data coming from the serial port.
+ *
+ * The calculation of the tones is made following the mathematical
+ * operation:
+ *
+ *       timeHigh = 1/(2 * toneFrequency) = period / 2
+ *
+ * where the different tones are described as in the table:
+ *
+ * note 	frequency 	period 	PW (timeHigh)	
+ * c 	        261 Hz 	        3830 	1915 	
+ * d 	        294 Hz 	        3400 	1700 	
+ * e 	        329 Hz 	        3038 	1519 	
+ * f 	        349 Hz 	        2864 	1432 	
+ * g 	        392 Hz 	        2550 	1275 	
+ * a 	        440 Hz 	        2272 	1136 	
+ * b 	        493 Hz 	        2028	1014	
+ * C	        523 Hz	        1912 	956
+ *
+ * (cleft) 2005 D. Cuartielles for K3
+ */
+
+int ledPin = 13;
+int speakerOut = 9;               
+byte names[] ={'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C'};  
+int tones[] = {1915, 1700, 1519, 1432, 1275, 1136, 1014, 956};
+byte val = 0;
+int serByte = -1;
+int statePin = LOW;
+int count = 0;
+
+void setup() {
+ pinMode(ledPin, OUTPUT); 
+ pinMode(speakerOut, OUTPUT); 
+ Serial.begin(9600);
+}
+
+void loop() {
+  digitalWrite(speakerOut, LOW);     
+  serByte = Serial.read();
+  if (serByte != -1) {
+    val = serByte;
+    Serial.print(val);
+    statePin = !statePin;
+    digitalWrite(ledPin, statePin);
+  }
+  for (count=0;count<=8;count++) {
+    if (names[count] == val) {       
+      digitalWrite(speakerOut, HIGH);
+      delayMicroseconds(tones[count]);
+      digitalWrite(speakerOut, LOW);
+      delayMicroseconds(tones[count]);
+    }
+  }
+}
+