우선 결과물이 작동에 대한 비디오부터 설명드립니다.
소스는 아래와 같습니다.
// 음 높이에 대한 주파수 #define NOTE_B0 31 #define NOTE_C1 33 #define NOTE_CS1 35 #define NOTE_D1 37 #define NOTE_DS1 39 #define NOTE_E1 41 #define NOTE_F1 44 #define NOTE_FS1 46 #define NOTE_G1 49 #define NOTE_GS1 52 #define NOTE_A1 55 #define NOTE_AS1 58 #define NOTE_B1 62 #define NOTE_C2 65 #define NOTE_CS2 69 #define NOTE_D2 73 #define NOTE_DS2 78 #define NOTE_E2 82 #define NOTE_F2 87 #define NOTE_FS2 93 #define NOTE_G2 98 #define NOTE_GS2 104 #define NOTE_A2 110 #define NOTE_AS2 117 #define NOTE_B2 123 #define NOTE_C3 131 #define NOTE_CS3 139 #define NOTE_D3 147 #define NOTE_DS3 156 #define NOTE_E3 165 #define NOTE_F3 175 #define NOTE_FS3 185 #define NOTE_G3 196 #define NOTE_GS3 208 #define NOTE_A3 220 #define NOTE_AS3 233 #define NOTE_B3 247 #define NOTE_C4 262 #define NOTE_CS4 277 #define NOTE_D4 294 #define NOTE_DS4 311 #define NOTE_E4 330 #define NOTE_F4 349 #define NOTE_FS4 370 #define NOTE_G4 392 #define NOTE_GS4 415 #define NOTE_A4 440 #define NOTE_AS4 466 #define NOTE_B4 494 #define NOTE_C5 523 #define NOTE_CS5 554 #define NOTE_D5 587 #define NOTE_DS5 622 #define NOTE_E5 659 #define NOTE_F5 698 #define NOTE_FS5 740 #define NOTE_G5 784 #define NOTE_GS5 831 #define NOTE_A5 880 #define NOTE_AS5 932 #define NOTE_B5 988 #define NOTE_C6 1047 #define NOTE_CS6 1109 #define NOTE_D6 1175 #define NOTE_DS6 1245 #define NOTE_E6 1319 #define NOTE_F6 1397 #define NOTE_FS6 1480 #define NOTE_G6 1568 #define NOTE_GS6 1661 #define NOTE_A6 1760 #define NOTE_AS6 1865 #define NOTE_B6 1976 #define NOTE_C7 2093 #define NOTE_CS7 2217 #define NOTE_D7 2349 #define NOTE_DS7 2489 #define NOTE_E7 2637 #define NOTE_F7 2794 #define NOTE_FS7 2960 #define NOTE_G7 3136 #define NOTE_GS7 3322 #define NOTE_A7 3520 #define NOTE_AS7 3729 #define NOTE_B7 3951 #define NOTE_C8 4186 #define NOTE_CS8 4435 #define NOTE_D8 4699 #define NOTE_DS8 4978 // 음 길이 #define WHOLE 1.0 #define HALF 0.5 #define HALF_DOT 0.75 #define QUARTER 0.25 #define QUARTER_DOT 0.375 #define EIGTH 0.125 #define EIGTH_DOT 0.1875 #define SIXTEENTH 0.0625 // 연주 속도 float duration = 2000; // My little pony 주제가 음표 const int melody[] PROGMEM = { NOTE_FS5, NOTE_A5, NOTE_FS5, NOTE_E5, NOTE_A5, NOTE_D5, NOTE_E5, NOTE_D5, NOTE_CS5, NOTE_A4, NOTE_B4, NOTE_CS5, NOTE_D5, NOTE_E5, NOTE_D5, 0, NOTE_CS5, NOTE_D5, NOTE_E5, NOTE_D5, /*NOTE_D5*/ NOTE_FS5, NOTE_FS5, NOTE_FS5, NOTE_FS5, 0, NOTE_D5, NOTE_E5, NOTE_D5, NOTE_FS5, NOTE_E5, NOTE_D5, 0, NOTE_CS5, NOTE_D5, NOTE_E5, NOTE_D5, 0, NOTE_D5, NOTE_E5, NOTE_FS5, 0, NOTE_A5, 0, NOTE_FS5, 0, NOTE_E5, NOTE_D5, NOTE_FS5, NOTE_E5, 0, NOTE_D5, NOTE_D5, NOTE_D5, NOTE_D5, NOTE_FS5, NOTE_A5, NOTE_B5, 0, NOTE_A5, NOTE_D5, NOTE_E5, 0, NOTE_E5, 0, NOTE_E5, NOTE_FS5, NOTE_E5, NOTE_FS5, 0, NOTE_E5, 0, NOTE_D5, NOTE_E5, 0, NOTE_FS5, NOTE_D5, NOTE_A5, NOTE_A5, NOTE_A5, NOTE_B5, 0, NOTE_A5, NOTE_D5, NOTE_E5, 0, NOTE_E5, 0, NOTE_E5, NOTE_A5, 0, NOTE_B5, 0, NOTE_A5, NOTE_A5, 0, NOTE_FS5, NOTE_G5, NOTE_D5, 0, NOTE_CS5, NOTE_D5, NOTE_E5, NOTE_D5, 0, NOTE_D5, NOTE_E5, NOTE_FS5, NOTE_D5, NOTE_G5, NOTE_FS5, NOTE_E5, 0, NOTE_D5, NOTE_FS5, NOTE_E5, NOTE_D5 }; // My little pony 주제가 음 길이 const float noteDurations[] PROGMEM = { EIGTH, EIGTH, EIGTH, QUARTER, QUARTER_DOT, EIGTH, EIGTH, EIGTH, QUARTER, QUARTER_DOT, QUARTER, QUARTER, QUARTER, QUARTER, EIGTH_DOT, SIXTEENTH, SIXTEENTH, EIGTH, EIGTH_DOT, QUARTER_DOT+ SIXTEENTH, SIXTEENTH, SIXTEENTH, SIXTEENTH, SIXTEENTH, SIXTEENTH, SIXTEENTH, EIGTH, EIGTH, EIGTH, EIGTH_DOT, EIGTH_DOT, SIXTEENTH, SIXTEENTH, EIGTH, EIGTH_DOT, EIGTH_DOT, QUARTER, SIXTEENTH, SIXTEENTH, EIGTH, SIXTEENTH, SIXTEENTH, SIXTEENTH, SIXTEENTH, SIXTEENTH, EIGTH, SIXTEENTH, EIGTH, QUARTER, SIXTEENTH, SIXTEENTH, SIXTEENTH, SIXTEENTH, EIGTH, EIGTH, SIXTEENTH, SIXTEENTH, SIXTEENTH, QUARTER, SIXTEENTH, SIXTEENTH, SIXTEENTH, SIXTEENTH, SIXTEENTH, EIGTH, EIGTH, SIXTEENTH, SIXTEENTH, SIXTEENTH, QUARTER, SIXTEENTH, SIXTEENTH, SIXTEENTH, SIXTEENTH, EIGTH, SIXTEENTH, SIXTEENTH, SIXTEENTH, SIXTEENTH, SIXTEENTH, SIXTEENTH, EIGTH_DOT, EIGTH, SIXTEENTH, SIXTEENTH, SIXTEENTH, SIXTEENTH, EIGTH, SIXTEENTH, SIXTEENTH, SIXTEENTH, SIXTEENTH, SIXTEENTH, SIXTEENTH, SIXTEENTH, SIXTEENTH, EIGTH, EIGTH_DOT, SIXTEENTH, SIXTEENTH, EIGTH, EIGTH_DOT, EIGTH, QUARTER, SIXTEENTH, SIXTEENTH, EIGTH, SIXTEENTH, EIGTH, EIGTH, EIGTH, SIXTEENTH, EIGTH, EIGTH, EIGTH, SIXTEENTH + QUARTER }; int pinSpeaker = 4; void setup() { pinMode(pinSpeaker, OUTPUT); } void loop() { play_music(); } void play_music() { for (int thisNote = 0; thisNote < 116; thisNote++) { // 지금 연주 할 음표의 음 길이를 읽어 옵니다. (PROGMEM을 사용한 경우에는 배열을 바로 읽어 올 수 없습니다) float d = pgm_read_float_near(¬eDurations[thisNote]); // 일어 온 음 길이에 연주 속도를 곱해서 사용합니다. // 연주 속도를 바꾸고 싶으면 103번 라인의 duration 값을 변경하면 됩니다. int noteDuration = duration * d; // 지금 연주 할 음표를 구해 옵니다. int note = pgm_read_word_near(&melody[thisNote]); // 구해 온 음표와 음 길이를 연주합니다. tone(pinSpeaker, note, noteDuration); // 연주가 되는 동안 기다립니다. // 연주 시간보다 조금 더(1.3배) 기다려서 음 간격 확실하게 합니다. // 예를 들어 1박짜리 음표 두 개를 그냥 이어서 연주하면 2박짜리 음표 하나처럼 들리게 됩니다. int pauseBetweenNotes = noteDuration * 1.30; delay(pauseBetweenNotes); // 소리 재생을 멈춥니다. noTone(pinSpeaker); } }
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