Create note_dance.ino

Author: connornishijima

examples/note_dance/note_dance.ino

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+/*
+ Volume3 Music Example
+ by Connor Nishijima
+
+ Picks a random note from a C Major scale to play,
+ switches between volume-envelope and normal tone()
+ behavior every 20 notes played.
+*/
+
+#include "Volume3.h" // Import the magic juju
+
+#define speakerPin 9 // Connect a speaker from Pin 9 to GND
+
+bool useVol = true; // Are we using volume envelopes?
+byte noteCount = 0; // Keeps track of notes played so far
+
+unsigned int scale[9] = {131, 165, 196, 262, 330, 392, 523, 659, 784}; // C Major scale in 3 octaves
+byte lastNote = 255; // Stores the last note played
+
+void setup() {
+ // Nothing needed here!
+}
+
+void loop() {
+ byte note = random(0, 9); // Pick a random note from the scale array
+
+ while (note == lastNote) { // We don't want repeat notes, try again until we find a new one
+ note = random(0, 9);
+ }
+
+ int frequency = scale[note]; // Set tone frequency based on the note we picked
+ int volume = 1023; // Start volume at full 10-bit 1023 value
+
+ if (useVol == true) {
+ // Play the note, and fade it out quickly
+ while (volume > 0) {
+ vol.tone(speakerPin, frequency, volume);
+ volume -= 10;
+ delay(2);
+ }
+ }
+ else {
+ vol.tone(speakerPin, frequency, 1023); // Just use max volume here
+ delay(110);
+ vol.noTone();
+ delay(110);
+ }
+
+ noteCount++;
+ if (noteCount % 20 == 0) { // If we've played 20 notes, switch between tone modes
+ useVol = !useVol;
+ }
+
+ lastNote = note; // Remember the note we picked for next run
+}