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teensy-audio/examples/Synthesis/Wavetable/ZeldaSynth/ZeldaSynth.ino

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  1. #include <Bounce.h>

  2. #include <Audio.h>

  3. #include <Wire.h>

  4. #include <SPI.h>

  5. #include <SD.h>

  6. #include <SerialFlash.h>

  7. 

  8. #include "Pizzicato_samples.h"

  9. #include "FrenchHorns_samples.h"

  10. #include "Viola_samples.h"

  11. #include "BasicFlute1_samples.h"

  12. #include "PlaySynthMusic.h"

  13. 

  14. //#define DEBUG_ALLOC

  15. 

  16. unsigned char *sp = score;

  17. 

  18. const int TOTAL_VOICES = 64;

  19. const int TOTAL_MIXERS = 21;

  20. const int SECONDARY_MIXERS = 4;

  21. 

  22. AudioControlSGTL5000 sgtl5000_1;

  23. AudioSynthWavetable wavetable[TOTAL_VOICES];

  24. AudioMixer4 mixer[TOTAL_MIXERS];

  25. AudioOutputI2S i2s1;

  26. AudioConnection patchCord[] = {

  27. 	{wavetable[ 0], 0, mixer[ 0], 0}, {wavetable[ 1], 0, mixer[ 0], 1}, {wavetable[ 2], 0, mixer[0],  2}, {wavetable[ 3], 0, mixer[0],  3}, {mixer[ 0], 0, mixer[TOTAL_MIXERS-2], 0},

  28. 	{wavetable[ 4], 0, mixer[ 1], 0}, {wavetable[ 5], 0, mixer[ 1], 1}, {wavetable[ 6], 0, mixer[1],  2}, {wavetable[ 7], 0, mixer[1],  3}, {mixer[ 1], 0, mixer[TOTAL_MIXERS-2], 1},

  29. 	{wavetable[ 8], 0, mixer[ 2], 0}, {wavetable[ 9], 0, mixer[ 2], 1}, {wavetable[10], 0, mixer[2],  2}, {wavetable[11], 0, mixer[2],  3}, {mixer[ 2], 0, mixer[TOTAL_MIXERS-2], 2},

  30. 	{wavetable[12], 0, mixer[ 3], 0}, {wavetable[13], 0, mixer[ 3], 1}, {wavetable[14], 0, mixer[3],  2}, {wavetable[15], 0, mixer[3],  3}, {mixer[ 3], 0, mixer[TOTAL_MIXERS-2], 3},

  31. 	{wavetable[16], 0, mixer[ 4], 0}, {wavetable[17], 0, mixer[ 4], 1}, {wavetable[18], 0, mixer[4],  2}, {wavetable[19], 0, mixer[4],  3}, {mixer[ 4], 0, mixer[TOTAL_MIXERS-3], 0},

  32. 	{wavetable[20], 0, mixer[ 5], 0}, {wavetable[21], 0, mixer[ 5], 1}, {wavetable[22], 0, mixer[5],  2}, {wavetable[23], 0, mixer[5],  3}, {mixer[ 5], 0, mixer[TOTAL_MIXERS-3], 1},

  33. 	{wavetable[24], 0, mixer[ 6], 0}, {wavetable[25], 0, mixer[ 6], 1}, {wavetable[26], 0, mixer[6],  2}, {wavetable[27], 0, mixer[6],  3}, {mixer[ 6], 0, mixer[TOTAL_MIXERS-3], 2},

  34. 	{wavetable[28], 0, mixer[ 7], 0}, {wavetable[29], 0, mixer[ 7], 1}, {wavetable[30], 0, mixer[7],  2}, {wavetable[31], 0, mixer[7],  3}, {mixer[ 7], 0, mixer[TOTAL_MIXERS-3], 3},

  35. 	{wavetable[32], 0, mixer[ 8], 0}, {wavetable[33], 0, mixer[ 8], 1}, {wavetable[34], 0, mixer[8],  2}, {wavetable[35], 0, mixer[8],  3}, {mixer[ 8], 0, mixer[TOTAL_MIXERS-4], 0},

  36. 	{wavetable[36], 0, mixer[ 9], 0}, {wavetable[37], 0, mixer[ 9], 1}, {wavetable[38], 0, mixer[9],  2}, {wavetable[39], 0, mixer[9],  3}, {mixer[ 9], 0, mixer[TOTAL_MIXERS-4], 1},

  37. 	{wavetable[40], 0, mixer[10], 0}, {wavetable[41], 0, mixer[10], 1}, {wavetable[42], 0, mixer[10], 2}, {wavetable[43], 0, mixer[10], 3}, {mixer[10], 0, mixer[TOTAL_MIXERS-4], 2},

  38. 	{wavetable[44], 0, mixer[11], 0}, {wavetable[45], 0, mixer[11], 1}, {wavetable[46], 0, mixer[11], 2}, {wavetable[47], 0, mixer[11], 3}, {mixer[11], 0, mixer[TOTAL_MIXERS-4], 3},

  39. 	{wavetable[48], 0, mixer[12], 0}, {wavetable[49], 0, mixer[12], 1}, {wavetable[50], 0, mixer[12], 2}, {wavetable[51], 0, mixer[12], 3}, {mixer[12], 0, mixer[TOTAL_MIXERS-5], 0},

  40. 	{wavetable[52], 0, mixer[13], 0}, {wavetable[53], 0, mixer[13], 1}, {wavetable[54], 0, mixer[13], 2}, {wavetable[55], 0, mixer[13], 3}, {mixer[13], 0, mixer[TOTAL_MIXERS-5], 1},

  41. 	{wavetable[56], 0, mixer[14], 0}, {wavetable[57], 0, mixer[14], 1}, {wavetable[58], 0, mixer[14], 2}, {wavetable[59], 0, mixer[14], 3}, {mixer[14], 0, mixer[TOTAL_MIXERS-5], 2},

  42. 	{wavetable[60], 0, mixer[15], 0}, {wavetable[61], 0, mixer[15], 1}, {wavetable[62], 0, mixer[15], 2}, {wavetable[63], 0, mixer[15], 3}, {mixer[15], 0, mixer[TOTAL_MIXERS-5], 3},

  43. 	{mixer[TOTAL_MIXERS-2], 0, mixer[TOTAL_MIXERS-1], 0},

  44. 	{mixer[TOTAL_MIXERS-3], 0, mixer[TOTAL_MIXERS-1], 1},

  45. 	{mixer[TOTAL_MIXERS-4], 0, mixer[TOTAL_MIXERS-1], 2},

  46. 	{mixer[TOTAL_MIXERS-5], 0, mixer[TOTAL_MIXERS-1], 3},

  47. 	{mixer[TOTAL_MIXERS-1], 0, i2s1, 0},

  48. 	{mixer[TOTAL_MIXERS-1], 0, i2s1, 1},

  49. };

  50. Bounce buttons[] = { {0, 15}, {1, 15}, {2, 15}, };

  51. const int TOTAL_BUTTONS = sizeof(buttons) / sizeof(Bounce);

  52. 

  53. void guitarHeroMode();

  54. void printVoices();

  55. void setVolume() {

  56. 	sgtl5000_1.volume(0.8*(analogRead(PIN_A2)-1)/1022.0);

  57. }

  58. 

  59. struct voice_t {

  60. 	int wavetable_id;

  61. 	byte channel;

  62. 	byte note;

  63. };

  64. voice_t voices[TOTAL_VOICES];

  65. 

  66. IntervalTimer midiMapTimer;

  67. IntervalTimer guitarHeroTimer;

  68. IntervalTimer volumeTimer;

  69. 

  70. void setup() {

  71. 	Serial.begin(115200);

  72. 

  73. 

  74. 	pinMode(0, INPUT_PULLUP);

  75. 	pinMode(1, INPUT_PULLUP);

  76. 	pinMode(2, INPUT_PULLUP);

  77. 

  78. 	AudioMemory(120);

  79. 

  80. 	sgtl5000_1.enable();

  81. 	sgtl5000_1.volume(0.8);

  82. 

  83. 	for (int i = 0; i < TOTAL_VOICES; ++i) {

  84. 		wavetable[i].setInstrument(Pizzicato);

  85. 		wavetable[i].amplitude(1);

  86. 		voices[i].wavetable_id = i;

  87. 		voices[i].channel = voices[i].note = 0xFF;

  88. 	}

  89. 

  90. 	for (int i = 0; i < TOTAL_MIXERS-1; ++i)

  91. 		for (int j = 0; j < 4; ++j)

  92. 			mixer[i].gain(j, 0.25);

  93. 	for (int i = 0; i < 4; ++i)

  94. 		mixer[TOTAL_MIXERS - 1].gain(i, i < SECONDARY_MIXERS ? 1.0 / SECONDARY_MIXERS : 0.0);

  95. 	

  96. 	usbMIDI.setHandleNoteOn(OnNoteOn);

  97. 	usbMIDI.setHandleNoteOff(OnNoteOff);

  98. 	//volumeTimer.begin(setVolume, 100000);

  99. 	guitarHeroTimer.begin(guitarHeroMode, 1000000/120);

  100. 	//midiMapTimer.begin(printVoices, 5000);

  101. 

  102.   delay(2000);

  103. }

  104. 

  105. void loop() {

  106.   unsigned char c,opcode,chan;

  107.   unsigned long d_time;

  108.   

  109.   // Volume control

  110.   //  uncomment if you have a volume pot soldered to your audio shield

  111.   /*

  112.   int n = analogRead(15);

  113.   if (n != volume) {

  114.     volume = n;

  115.     codec.volume((float)n / 1023);

  116.   }

  117.   */

  118.   

  119.   // read the next note from the table

  120.   c = *sp++;

  121.   opcode = c & 0xF0;

  122.   chan = c & 0x0F;

  123. 

  124.   if(c < 0x80) {

  125.     // Delay

  126.     d_time = (c << 8) | *sp++;

  127.     delay(d_time);

  128.     return;

  129.   }

  130.   if(*sp == CMD_STOP) {

  131.     for (int i=0; i<TOTAL_VOICES; i++) {

  132.       wavetable[chan].stop();

  133.     }

  134.     while(1);

  135.   }

  136. 

  137.   // It is a command

  138. 

  139.   //Change the instrument for generator

  140.   if(opcode == CMD_CHANGEINST) {

  141.     unsigned char inst = *sp++;

  142.     wavetable[chan].stop();

  143.     switch(inst) {

  144.       case 48:

  145.         wavetable[chan].setInstrument(Viola);

  146.         break;

  147.       case 57:

  148.         wavetable[chan].setInstrument(BasicFlute1);

  149.         break;

  150.       default:

  151.         wavetable[chan].setInstrument(FrenchHorns);

  152.         break;

  153.     }

  154.     return;

  155.   }

  156.   

  157.   // Stop the note on 'chan'

  158.   if(opcode == CMD_STOPNOTE) {

  159.     wavetable[chan].stop();

  160.     return;

  161.   }

  162.   

  163.   // Play the note on 'chan'

  164.   if(opcode == CMD_PLAYNOTE) {

  165.     unsigned char note = *sp++;

  166.     unsigned char velocity = *sp++;

  167.     wavetable[chan].playNote((byte)note);

  168.     //OnNoteOn(chan, (byte)note, (byte)velocity);

  169.     return;

  170.   }

  171. 

  172.   // replay the tune

  173.   if(opcode == CMD_RESTART) {

  174.     sp = score;

  175.     return;

  176.   }

  177. 

  178. 	usbMIDI.read();

  179. 	//for (int i = 0; i < TOTAL_BUTTONS; ++i) buttons[i].update();

  180. 	//if (buttons[0].fallingEdge()) AudioSynthWavetable::print_performance();

  181. 	//if (buttons[1].risingEdge()) {

  182. 	//	midiMapTimer.end();

  183. 	//	Serial.print('\n');

  184. 	//}

  185. 	//if (buttons[1].fallingEdge()) midiMapTimer.begin(printVoices, 5000);

  186. 	//if (buttons[2].risingEdge()) guitarHeroTimer.end();

  187. 	//if (buttons[2].fallingEdge())

  188. 	//	guitarHeroTimer.begin(guitarHeroMode, 1000000/60);

  189. }

  190. 

  191. int allocateVoice(byte channel, byte note);

  192. int findVoice(byte channel, byte note);

  193. void freeVoices();

  194. 

  195. int used_voices = 0;

  196. int stopped_voices = 0;

  197. int evict_voice = 0;

  198. int notes_played = 0;

  199. 

  200. void OnNoteOn(byte channel, byte note, byte velocity) {

  201. 	notes_played++;

  202. #ifdef DEBUG_ALLOC

  203. 	//Serial.printf("**** NoteOn: channel==%hhu,note==%hhu ****\n", channel, note);

  204. 	printVoices();

  205. #endif //DEBUG_ALLOC

  206. 	freeVoices();

  207. 	int wavetable_id = allocateVoice(channel, note);

  208.   switch (channel) {

  209.     case 1:

  210.       wavetable[wavetable_id].setInstrument(Pizzicato);

  211.       break;

  212.     case 2:

  213.       wavetable[wavetable_id].setInstrument(Pizzicato);

  214.       break;

  215.     case 3:

  216.       wavetable[wavetable_id].setInstrument(Pizzicato);

  217.       break;

  218.     case 4:

  219.       wavetable[wavetable_id].setInstrument(Pizzicato);

  220.       break;

  221.     case 5:

  222.       wavetable[wavetable_id].setInstrument(Pizzicato);

  223.       break;

  224.     default:

  225.       wavetable[wavetable_id].setInstrument(Pizzicato);

  226.       break;

  227.   }

  228. 	wavetable[wavetable_id].playNote(note);

  229. #ifdef DEBUG_ALLOC

  230. 	printVoices();

  231. #endif //DEBUG_ALLOC

  232. }

  233. 

  234. void OnNoteOff(byte channel, byte note, byte velocity) {

  235. #ifdef DEBUG_ALLOC

  236. 	//Serial.printf("\n**** NoteOff: channel==%hhu,note==%hhu ****", channel, note);

  237. 	printVoices();

  238. #endif //DEBUG_ALLOC

  239. 	int wavetable_id = findVoice(channel, note);

  240. 	if (wavetable_id != TOTAL_VOICES)

  241. 		wavetable[wavetable_id].stop();

  242. #ifdef DEBUG_ALLOC

  243. 	printVoices();

  244. #endif //DEBUG_ALLOC

  245. }

  246. 

  247. int allocateVoice(byte channel, byte note) {

  248. 	int i;

  249. 	int nonfree_voices = stopped_voices + used_voices;

  250. 	if (nonfree_voices < TOTAL_VOICES) {

  251. 		for (i = nonfree_voices; i < TOTAL_VOICES && voices[i].channel != channel; ++i);

  252. 		if (i < TOTAL_VOICES) {

  253. 			voice_t temp = voices[i];

  254. 			voices[i] = voices[nonfree_voices];

  255. 			voices[nonfree_voices] = temp;

  256. 		}

  257. 		i = nonfree_voices;

  258. 		used_voices++;

  259. 	} else {

  260. 		if (stopped_voices) {

  261. 			i = evict_voice % stopped_voices;

  262. 			voice_t temp = voices[i];

  263. 			stopped_voices--;

  264. 			voices[i] = voices[stopped_voices];

  265. 			voices[stopped_voices] = temp;

  266. 			used_voices++;

  267. 			i = stopped_voices;

  268. 		}

  269. 		else

  270. 			i = evict_voice;

  271. 	}

  272. 

  273. 	voices[i].channel = channel;

  274. 	voices[i].note = note;

  275. 

  276. 	evict_voice++;

  277. 	evict_voice %= TOTAL_VOICES;

  278. 

  279. 	return voices[i].wavetable_id;

  280. }

  281. 

  282. int findVoice(byte channel, byte note) {

  283. 	int i;

  284. 	//find match

  285. 	int nonfree_voices = stopped_voices + used_voices;

  286. 	for (i = stopped_voices; i < nonfree_voices && !(voices[i].channel == channel && voices[i].note == note); ++i);

  287. 	//return TOTAL_VOICES if no match

  288. 	if (i == (nonfree_voices)) return TOTAL_VOICES;

  289. 

  290. 	voice_t temp = voices[i];

  291. 	voices[i] = voices[stopped_voices];

  292. 	voices[stopped_voices] = temp;

  293. 	--used_voices;

  294. 

  295. 	return voices[stopped_voices++].wavetable_id;

  296. }

  297. 

  298. void freeVoices() {

  299. 	for (int i = 0; i < stopped_voices; i++)

  300. 		if (wavetable[voices[i].wavetable_id].isPlaying() == false) {

  301. 			voice_t temp = voices[i];

  302. 			--stopped_voices;

  303. 			voices[i] = voices[stopped_voices];

  304. 			int nonfree_voices = stopped_voices + used_voices;

  305. 			voices[stopped_voices] = voices[nonfree_voices];

  306. 			voices[nonfree_voices] = temp;

  307. 		}

  308. }

  309. 

  310. void guitarHeroMode() { // now unicorn friendly

  311. 	const int RESET = 4;

  312. 	const int MIDI_NOTES = 128;

  313. 	static char line[MIDI_NOTES+1] = { 0 };

  314. 	static int accumulated = 0;

  315. 	if (!accumulated) {

  316. 		for (int i = 0; i < MIDI_NOTES; ++i) line[i] = '-';

  317. 		++accumulated;

  318. 	}

  319. 	for (int i = stopped_voices; i < used_voices+stopped_voices; ++i) line[voices[i].note] = '*';

  320. 	if (accumulated == RESET) {

  321. 		Serial.println(line);

  322. 		accumulated = 0;

  323. 	} else {

  324. 		++accumulated;

  325. 	}

  326. }

  327. 

  328. const char* note_map[] = {

  329. 	"C","C#","D","D#","E","F","F#","G","G#","A","A#","B"

  330. };

  331. 

  332. void printVoices() {

  333. 	static int last_notes_played = notes_played;

  334. 	if (last_notes_played == notes_played)

  335. 		return;

  336. 	last_notes_played = notes_played;

  337. 	int usage = AudioProcessorUsage();

  338. 	Serial.printf("\nCPU:%03i voices:%02i CPU/Voice:%02i evict:%02i", usage, used_voices, usage/used_voices, evict_voice);

  339. 	for (int i = 0; i < used_voices; ++i)

  340. 		Serial.printf(" %02hhu %-2s", voices[i].channel, note_map[voices[i].note%12]);

  341. 

  342. }