Alexander Hentschel / C64Synth

Synth with C64 like sounds. Played on two piezo buzzers with a PS/2 keyboard. Implemented on FRDM-KL46Z

Dependencies:   PS2 TSI beep2 mbed

C64Synth.cpp@4:0f73a5d06177, 2014-01-24 (annotated)

Committer:
alexanderh
Date:
Fri Jan 24 10:13:23 2014 +0000
Revision:
4:0f73a5d06177
Parent:
3:2cd5dfcad0e6 
Doxygen docs

Who changed what in which revision?

UserRevisionLine numberNew contents of line
alexanderh 3:2cd5dfcad0e6 1
alexanderh 4:0f73a5d06177 2 /*
alexanderh 0:00eec4d97228 3 * C64Synth uses a PS/2 keyboard to play C64 arps and simple tones.
alexanderh 0:00eec4d97228 4 * Implemented on a FRDM KL46Z board
alexanderh 0:00eec4d97228 5 *
alexanderh 0:00eec4d97228 6 * The keyboard is tuned in the C scale as of right now
alexanderh 0:00eec4d97228 7 *
alexanderh 0:00eec4d97228 8 * Author: Alexander Hentschel 2014
alexanderh 0:00eec4d97228 9 */
alexanderh 0:00eec4d97228 10
alexanderh 0:00eec4d97228 11 /*
alexanderh 0:00eec4d97228 12 * TODO LIST
alexanderh 0:00eec4d97228 13 *
alexanderh 0:00eec4d97228 14 * Implemept sharp (#) notes
alexanderh 0:00eec4d97228 15 * Implement scale change
alexanderh 0:00eec4d97228 16 *
alexanderh 0:00eec4d97228 17 *
alexanderh 0:00eec4d97228 18 *
alexanderh 0:00eec4d97228 19 */
alexanderh 0:00eec4d97228 20
alexanderh 0:00eec4d97228 21
alexanderh 0:00eec4d97228 22
alexanderh 0:00eec4d97228 23
alexanderh 0:00eec4d97228 24 #include "mbed.h"
alexanderh 0:00eec4d97228 25 #include "beep2.h"
alexanderh 0:00eec4d97228 26 #include "TSISensor.h"
alexanderh 0:00eec4d97228 27 #include "PS2Keyboard.h"
alexanderh 0:00eec4d97228 28 #include "stdio.h"
alexanderh 0:00eec4d97228 29 #include "keys.h"
alexanderh 0:00eec4d97228 30
alexanderh 0:00eec4d97228 31 DigitalOut myled1(LED1);
alexanderh 0:00eec4d97228 32 DigitalOut myled2(LED2);
alexanderh 0:00eec4d97228 33
alexanderh 0:00eec4d97228 34 Beep arpBuzzer(PTA5);
alexanderh 0:00eec4d97228 35 Beep toneBuzzer(PTA12);
alexanderh 0:00eec4d97228 36 PS2Keyboard ps2kb(PTC8,PTC9);
alexanderh 0:00eec4d97228 37 TSISensor tsi;
alexanderh 0:00eec4d97228 38
alexanderh 0:00eec4d97228 39 PS2Keyboard::keyboard_event_t evt_kb;
alexanderh 0:00eec4d97228 40
alexanderh 0:00eec4d97228 41 void keyboardSynth();
alexanderh 0:00eec4d97228 42 void playArp(char chord);
alexanderh 0:00eec4d97228 43 void playNote(Beep buz,char note,float dc,float len);
alexanderh 0:00eec4d97228 44 void playContNote(char note,int oct,float dc);
alexanderh 0:00eec4d97228 45
alexanderh 0:00eec4d97228 46 void getNotes(char note, char* point);
alexanderh 0:00eec4d97228 47 float getFq(char note, bool sharp);
alexanderh 0:00eec4d97228 48
alexanderh 0:00eec4d97228 49
alexanderh 0:00eec4d97228 50 float toneDc = 0.5;
alexanderh 0:00eec4d97228 51 char lastNote;
alexanderh 0:00eec4d97228 52
alexanderh 0:00eec4d97228 53 bool arpAttack = false;
alexanderh 0:00eec4d97228 54 float arpDc = 0.5;
alexanderh 0:00eec4d97228 55 float arpSpeed = 0.02;
alexanderh 0:00eec4d97228 56 float arpTempovar = 0.1;
alexanderh 0:00eec4d97228 57 float arpSpeed2;
alexanderh 0:00eec4d97228 58 float arpTime = 0.025;
alexanderh 0:00eec4d97228 59
alexanderh 0:00eec4d97228 60 float masterscale=1;
alexanderh 0:00eec4d97228 61
alexanderh 0:00eec4d97228 62 int main()
alexanderh 0:00eec4d97228 63 {
alexanderh 0:00eec4d97228 64 printf("--Program Start--");
alexanderh 0:00eec4d97228 65 myled2 = !myled2;
alexanderh 0:00eec4d97228 66 keyboardSynth();
alexanderh 0:00eec4d97228 67 }
alexanderh 0:00eec4d97228 68
alexanderh 0:00eec4d97228 69
alexanderh 0:00eec4d97228 70 void keyboardSynth()
alexanderh 0:00eec4d97228 71 {
alexanderh 0:00eec4d97228 72 int arpOn = 0;
alexanderh 0:00eec4d97228 73 int toneOn =0;
alexanderh 0:00eec4d97228 74 char keytone = ' ';
alexanderh 0:00eec4d97228 75 char playtone = ' ';
alexanderh 0:00eec4d97228 76 char playchor = ' ';
alexanderh 0:00eec4d97228 77 char chor;
alexanderh 0:00eec4d97228 78 char test;
alexanderh 0:00eec4d97228 79 int octave;
alexanderh 0:00eec4d97228 80
alexanderh 2:a8ec77eed4cc 81
alexanderh 0:00eec4d97228 82 //PS/2 keyboard test
alexanderh 0:00eec4d97228 83 while(1) {
alexanderh 0:00eec4d97228 84
alexanderh 0:00eec4d97228 85 if (ps2kb.processing(&evt_kb)) {
alexanderh 0:00eec4d97228 86
alexanderh 0:00eec4d97228 87 //DEBUG keyboard terminalprint
alexanderh 0:00eec4d97228 88 //printf("[%d]:", evt_kb.type);
alexanderh 0:00eec4d97228 89 //for (int i = 0; i < evt_kb.length; i++) {
alexanderh 0:00eec4d97228 90 // printf("%02x ", evt_kb.scancode[i]);
alexanderh 0:00eec4d97228 91 // }
alexanderh 0:00eec4d97228 92 //printf("\n");
alexanderh 0:00eec4d97228 93
alexanderh 0:00eec4d97228 94 //KEY PRESS PART
alexanderh 0:00eec4d97228 95 if (!evt_kb.type) {
alexanderh 0:00eec4d97228 96
alexanderh 0:00eec4d97228 97 switch(evt_kb.scancode[0]) {
alexanderh 0:00eec4d97228 98
alexanderh 0:00eec4d97228 99 //FUNCTION KEYS
alexanderh 0:00eec4d97228 100 case Space_key:
alexanderh 0:00eec4d97228 101 arpOn = 0;
alexanderh 0:00eec4d97228 102 toneOn = 0;
alexanderh 0:00eec4d97228 103 break;
alexanderh 0:00eec4d97228 104
alexanderh 0:00eec4d97228 105 //MULTICODE KEYS
alexanderh 0:00eec4d97228 106 case Mod_fn:
alexanderh 0:00eec4d97228 107 switch(evt_kb.scancode[1]) {
alexanderh 0:00eec4d97228 108
alexanderh 0:00eec4d97228 109 case Up_key:
alexanderh 0:00eec4d97228 110 masterscale = masterscale*2;
alexanderh 0:00eec4d97228 111 break;
alexanderh 0:00eec4d97228 112 //Tune down 1 octave
alexanderh 0:00eec4d97228 113 case Down_key:
alexanderh 0:00eec4d97228 114 masterscale = masterscale/2;
alexanderh 0:00eec4d97228 115 break;
alexanderh 0:00eec4d97228 116 //Faster arp speed
alexanderh 0:00eec4d97228 117 case Pgup_key:
alexanderh 0:00eec4d97228 118 arpTime = arpTime/1.2;
alexanderh 0:00eec4d97228 119 break;
alexanderh 0:00eec4d97228 120 //Slower arp speed
alexanderh 0:00eec4d97228 121 case Pgdown_key:
alexanderh 0:00eec4d97228 122 arpTime = arpTime*1.2;
alexanderh 0:00eec4d97228 123 break;
alexanderh 0:00eec4d97228 124 //Brighter sound
alexanderh 0:00eec4d97228 125 case Left_key:
alexanderh 0:00eec4d97228 126 toneDc = 0.98;
alexanderh 0:00eec4d97228 127 break;
alexanderh 0:00eec4d97228 128 //Square wave
alexanderh 0:00eec4d97228 129 case Right_key:
alexanderh 0:00eec4d97228 130 toneDc = 0.5;
alexanderh 0:00eec4d97228 131 break;
alexanderh 0:00eec4d97228 132 //Arp Attack
alexanderh 0:00eec4d97228 133 case End_key:
alexanderh 0:00eec4d97228 134 if (!arpAttack) {
alexanderh 0:00eec4d97228 135 arpDc = 0;
alexanderh 0:00eec4d97228 136 arpSpeed = 0.02;
alexanderh 0:00eec4d97228 137 } else {
alexanderh 0:00eec4d97228 138 arpDc = 0.5;
alexanderh 0:00eec4d97228 139 }
alexanderh 0:00eec4d97228 140 arpAttack = !arpAttack;
alexanderh 0:00eec4d97228 141 break;
alexanderh 0:00eec4d97228 142 }
alexanderh 0:00eec4d97228 143 break;
alexanderh 0:00eec4d97228 144
alexanderh 0:00eec4d97228 145 //ARPS
alexanderh 0:00eec4d97228 146 case Z_key:
alexanderh 0:00eec4d97228 147 chor = 'a';
alexanderh 0:00eec4d97228 148 break;
alexanderh 0:00eec4d97228 149 case X_key:
alexanderh 0:00eec4d97228 150 // chor = 'b'
alexanderh 0:00eec4d97228 151 //arpOn = true;
alexanderh 0:00eec4d97228 152 break;
alexanderh 0:00eec4d97228 153 case C_key:
alexanderh 0:00eec4d97228 154 chor = 'C';
alexanderh 0:00eec4d97228 155 break;
alexanderh 0:00eec4d97228 156 case V_key:
alexanderh 0:00eec4d97228 157 chor = 'd';
alexanderh 0:00eec4d97228 158 break;
alexanderh 0:00eec4d97228 159 case B_key:
alexanderh 0:00eec4d97228 160 chor = 'e';
alexanderh 0:00eec4d97228 161 break;
alexanderh 0:00eec4d97228 162 case N_key:
alexanderh 0:00eec4d97228 163 chor = 'F';
alexanderh 0:00eec4d97228 164 break;
alexanderh 0:00eec4d97228 165 case M_key:
alexanderh 0:00eec4d97228 166 chor = 'G';
alexanderh 0:00eec4d97228 167 break;
alexanderh 0:00eec4d97228 168
alexanderh 0:00eec4d97228 169 // -- TONES --
alexanderh 0:00eec4d97228 170 //ROW 1
alexanderh 0:00eec4d97228 171 case A_key:
alexanderh 0:00eec4d97228 172 keytone = 'a';
alexanderh 0:00eec4d97228 173 octave = 1;
alexanderh 0:00eec4d97228 174 break;
alexanderh 0:00eec4d97228 175 case S_key:
alexanderh 0:00eec4d97228 176 keytone = 'b';
alexanderh 0:00eec4d97228 177 octave = 1;
alexanderh 0:00eec4d97228 178 break;
alexanderh 0:00eec4d97228 179 case D_key:
alexanderh 0:00eec4d97228 180 keytone = 'c';
alexanderh 0:00eec4d97228 181 octave = 1;
alexanderh 0:00eec4d97228 182 break;
alexanderh 0:00eec4d97228 183 case F_key:
alexanderh 0:00eec4d97228 184 keytone = 'd';
alexanderh 0:00eec4d97228 185 octave = 1;
alexanderh 0:00eec4d97228 186 break;
alexanderh 0:00eec4d97228 187 case G_key:
alexanderh 0:00eec4d97228 188 keytone = 'e';
alexanderh 0:00eec4d97228 189 octave = 1;
alexanderh 0:00eec4d97228 190 break;
alexanderh 0:00eec4d97228 191 case H_key:
alexanderh 0:00eec4d97228 192 keytone = 'f';
alexanderh 0:00eec4d97228 193 octave = 1;
alexanderh 0:00eec4d97228 194 break;
alexanderh 0:00eec4d97228 195 case J_key:
alexanderh 0:00eec4d97228 196 keytone = 'g';
alexanderh 0:00eec4d97228 197 octave = 1;
alexanderh 0:00eec4d97228 198 break;
alexanderh 0:00eec4d97228 199
alexanderh 0:00eec4d97228 200 //ROW 2
alexanderh 0:00eec4d97228 201 //TODO speaker 3
alexanderh 0:00eec4d97228 202 case Q_key:
alexanderh 0:00eec4d97228 203 keytone = 'a';
alexanderh 0:00eec4d97228 204 octave = 2;
alexanderh 0:00eec4d97228 205 break;
alexanderh 0:00eec4d97228 206 case W_key:
alexanderh 0:00eec4d97228 207 keytone = 'b';
alexanderh 0:00eec4d97228 208 octave = 2;
alexanderh 0:00eec4d97228 209 break;
alexanderh 0:00eec4d97228 210 case E_key:
alexanderh 0:00eec4d97228 211 keytone = 'c';
alexanderh 0:00eec4d97228 212 octave = 2;
alexanderh 0:00eec4d97228 213 break;
alexanderh 0:00eec4d97228 214 case R_key:
alexanderh 0:00eec4d97228 215 keytone = 'd';
alexanderh 0:00eec4d97228 216 octave = 2;
alexanderh 0:00eec4d97228 217 break;
alexanderh 0:00eec4d97228 218 case T_key:
alexanderh 0:00eec4d97228 219 keytone = 'e';
alexanderh 0:00eec4d97228 220 octave = 2;
alexanderh 0:00eec4d97228 221 break;
alexanderh 0:00eec4d97228 222 case Y_key:
alexanderh 0:00eec4d97228 223 keytone = 'f';
alexanderh 0:00eec4d97228 224 octave = 2;
alexanderh 0:00eec4d97228 225 break;
alexanderh 0:00eec4d97228 226 case U_key:
alexanderh 0:00eec4d97228 227 keytone = 'g';
alexanderh 0:00eec4d97228 228 octave = 2;
alexanderh 0:00eec4d97228 229 break;
alexanderh 0:00eec4d97228 230 }
alexanderh 0:00eec4d97228 231
alexanderh 0:00eec4d97228 232 //Set the tone that should be played. Only do this if the key is not already playing
alexanderh 0:00eec4d97228 233 if(keytone != playtone) {
alexanderh 0:00eec4d97228 234 playtone = keytone;
alexanderh 0:00eec4d97228 235 toneOn++;
alexanderh 0:00eec4d97228 236 }
alexanderh 0:00eec4d97228 237
alexanderh 0:00eec4d97228 238 //Set the chord that should be played. Only do this if the key is not already playing
alexanderh 0:00eec4d97228 239 if(chor != playchor) {
alexanderh 0:00eec4d97228 240 playchor = chor;
alexanderh 0:00eec4d97228 241 arpOn++;
alexanderh 0:00eec4d97228 242 }
alexanderh 0:00eec4d97228 243
alexanderh 0:00eec4d97228 244
alexanderh 0:00eec4d97228 245 //KEY RELEASE PART
alexanderh 0:00eec4d97228 246 } else {
alexanderh 0:00eec4d97228 247 test = evt_kb.scancode[1];
alexanderh 0:00eec4d97228 248
alexanderh 0:00eec4d97228 249 //Arp key is released
alexanderh 0:00eec4d97228 250 if ( test == Z_key || /*test == S_key ||*/ test == C_key || test == V_key || test == B_key || test == N_key || test == M_key) {
alexanderh 0:00eec4d97228 251
alexanderh 0:00eec4d97228 252 //ATTACK MODE
alexanderh 0:00eec4d97228 253 if (arpAttack && arpOn == 1) {
alexanderh 0:00eec4d97228 254 arpDc = 0;
alexanderh 0:00eec4d97228 255 arpSpeed = 0.02;
alexanderh 0:00eec4d97228 256 }
alexanderh 0:00eec4d97228 257 arpOn--;
alexanderh 0:00eec4d97228 258 }
alexanderh 0:00eec4d97228 259 //Tone key is released
alexanderh 0:00eec4d97228 260 if ( test == Q_key || test == W_key || test == E_key || test == R_key || test == T_key || test == Y_key || test == U_key ||
alexanderh 0:00eec4d97228 261 test == A_key || test == S_key || test == D_key || test == F_key || test == G_key || test == H_key || test == J_key) {
alexanderh 0:00eec4d97228 262 toneOn--;
alexanderh 0:00eec4d97228 263 }
alexanderh 0:00eec4d97228 264 }
alexanderh 0:00eec4d97228 265 }
alexanderh 0:00eec4d97228 266
alexanderh 0:00eec4d97228 267 //TONE HANDLER
alexanderh 0:00eec4d97228 268 if (toneOn> 0) {
alexanderh 3:2cd5dfcad0e6 269 playContNote(playtone,octave,0.9);
alexanderh 0:00eec4d97228 270 } else {
alexanderh 0:00eec4d97228 271 keytone = ' ';
alexanderh 0:00eec4d97228 272 playtone = ' ';
alexanderh 0:00eec4d97228 273 lastNote = ' ';
alexanderh 0:00eec4d97228 274 toneBuzzer.nobeep();
alexanderh 0:00eec4d97228 275 toneOn = 0;
alexanderh 0:00eec4d97228 276 }
alexanderh 0:00eec4d97228 277
alexanderh 0:00eec4d97228 278 //CHORD/ARP HANDLER
alexanderh 0:00eec4d97228 279 if (arpOn>0) {
alexanderh 0:00eec4d97228 280 playArp(playchor);
alexanderh 0:00eec4d97228 281 } else {
alexanderh 0:00eec4d97228 282 chor = ' ';
alexanderh 0:00eec4d97228 283 playchor = ' ';
alexanderh 0:00eec4d97228 284 arpOn = 0;
alexanderh 0:00eec4d97228 285 }
alexanderh 0:00eec4d97228 286 }
alexanderh 0:00eec4d97228 287 }
alexanderh 0:00eec4d97228 288
alexanderh 4:0f73a5d06177 289 /**
alexanderh 0:00eec4d97228 290 *
alexanderh 1:9cc595290b2f 291 * Plays an arpeggio of the provided chord. Arp speed can be controlled by touch slider or pgup/pgdown setting. PWM duty cycle is sweeped automatically
alexanderh 0:00eec4d97228 292 *
alexanderh 1:9cc595290b2f 293 * @param chord the chord to be played UPPER CASE is major chords, lower case is minor chords.
alexanderh 0:00eec4d97228 294 *
alexanderh 0:00eec4d97228 295 */
alexanderh 0:00eec4d97228 296 void playArp(char chord)
alexanderh 0:00eec4d97228 297 {
alexanderh 0:00eec4d97228 298 static int arpCounter;
alexanderh 0:00eec4d97228 299 static char theChord[3];
alexanderh 0:00eec4d97228 300 getNotes(chord, theChord);
alexanderh 0:00eec4d97228 301
alexanderh 0:00eec4d97228 302 //keep duty cycle between 0.03 and 0.97.
alexanderh 0:00eec4d97228 303 if((arpDc > 0.98 && arpSpeed >0)|| (arpDc < 0.02 && arpSpeed <0)) {
alexanderh 0:00eec4d97228 304 arpSpeed = arpSpeed*-1;
alexanderh 0:00eec4d97228 305 }
alexanderh 0:00eec4d97228 306
alexanderh 0:00eec4d97228 307 arpSpeed2 = tsi.readPercentage()/15;
alexanderh 0:00eec4d97228 308 //Play the correct note in the chord. Vary the duty cycle and tempo for cool C64 arp effect
alexanderh 0:00eec4d97228 309 playNote(arpBuzzer,theChord[arpCounter],arpDc,arpTime+arpTempovar*arpSpeed+arpSpeed2);
alexanderh 0:00eec4d97228 310
alexanderh 0:00eec4d97228 311 arpDc = arpDc+arpSpeed;
alexanderh 0:00eec4d97228 312
alexanderh 0:00eec4d97228 313 //Reset the notes
alexanderh 0:00eec4d97228 314 arpCounter++;
alexanderh 0:00eec4d97228 315 if (arpCounter == 3) {
alexanderh 0:00eec4d97228 316 arpCounter= 0;
alexanderh 0:00eec4d97228 317 }
alexanderh 0:00eec4d97228 318 }
alexanderh 0:00eec4d97228 319
alexanderh 4:0f73a5d06177 320 /**
alexanderh 0:00eec4d97228 321 *
alexanderh 3:2cd5dfcad0e6 322 * Plays a note on the provided buzzer
alexanderh 0:00eec4d97228 323 *
alexanderh 1:9cc595290b2f 324 * @param buz the buzzer to play the note on,
alexanderh 1:9cc595290b2f 325 * @param note the note to be played
alexanderh 1:9cc595290b2f 326 * @param dc the duty cycle value
alexanderh 3:2cd5dfcad0e6 327 * @param len the length of the note
alexanderh 0:00eec4d97228 328 *
alexanderh 0:00eec4d97228 329 */
alexanderh 0:00eec4d97228 330 void playNote(Beep buz, char note,float dc,float len)
alexanderh 0:00eec4d97228 331 {
alexanderh 0:00eec4d97228 332 buz.beep(getFq(note,false),len,dc);
alexanderh 0:00eec4d97228 333 myled1 = !myled1;
alexanderh 0:00eec4d97228 334 myled2 = !myled2;
alexanderh 0:00eec4d97228 335 if (note=='w') {
alexanderh 0:00eec4d97228 336 wait(0.05);
alexanderh 0:00eec4d97228 337 }
alexanderh 0:00eec4d97228 338 wait (len); //wait while the note plays.
alexanderh 0:00eec4d97228 339 }
alexanderh 0:00eec4d97228 340
alexanderh 0:00eec4d97228 341
alexanderh 3:2cd5dfcad0e6 342 /** -- PlayContNote --
alexanderh 0:00eec4d97228 343 *
alexanderh 1:9cc595290b2f 344 * Plays a continuous note on the second buzzer
alexanderh 0:00eec4d97228 345 *
alexanderh 1:9cc595290b2f 346 * @param note the note to be played
alexanderh 1:9cc595290b2f 347 * @param oct the octave
alexanderh 3:2cd5dfcad0e6 348 * @param dc the duty cycle of the note
alexanderh 0:00eec4d97228 349 */
alexanderh 0:00eec4d97228 350 void playContNote(char note,int oct,float dc)
alexanderh 0:00eec4d97228 351 {
alexanderh 0:00eec4d97228 352 static float fq;
alexanderh 0:00eec4d97228 353
alexanderh 0:00eec4d97228 354 if(lastNote != note) {
alexanderh 0:00eec4d97228 355 fq = getFq(note,false);
alexanderh 0:00eec4d97228 356 toneBuzzer.beepNoStop(fq*oct/2,toneDc);
alexanderh 0:00eec4d97228 357 myled1 = !myled1;
alexanderh 0:00eec4d97228 358 myled2 = !myled2;
alexanderh 0:00eec4d97228 359 } else {
alexanderh 0:00eec4d97228 360 toneBuzzer.changeDc(toneDc);
alexanderh 0:00eec4d97228 361 }
alexanderh 0:00eec4d97228 362
alexanderh 0:00eec4d97228 363 //wait (len); //wait while the note plays.
alexanderh 0:00eec4d97228 364 lastNote = note;
alexanderh 0:00eec4d97228 365 }
alexanderh 0:00eec4d97228 366
alexanderh 3:2cd5dfcad0e6 367 /**
alexanderh 0:00eec4d97228 368 *
alexanderh 1:9cc595290b2f 369 * Gets the notes in a chord
alexanderh 0:00eec4d97228 370 *
alexanderh 1:9cc595290b2f 371 * @param chord the chord
alexanderh 1:9cc595290b2f 372 * @param notes the array to save the notes in
alexanderh 0:00eec4d97228 373 *
alexanderh 0:00eec4d97228 374 */
alexanderh 0:00eec4d97228 375
alexanderh 0:00eec4d97228 376 void getNotes(char chord, char* notes)
alexanderh 0:00eec4d97228 377 {
alexanderh 0:00eec4d97228 378 if (chord=='a') {
alexanderh 0:00eec4d97228 379 notes[0] = 'a';
alexanderh 0:00eec4d97228 380 notes[1] = 'c';
alexanderh 0:00eec4d97228 381 notes[2] = 'e';
alexanderh 0:00eec4d97228 382 }
alexanderh 0:00eec4d97228 383 if (chord=='C') {
alexanderh 0:00eec4d97228 384 notes[0] = 'g';
alexanderh 0:00eec4d97228 385 notes[1] = 'c';
alexanderh 0:00eec4d97228 386 notes[2] = 'e';
alexanderh 0:00eec4d97228 387 }
alexanderh 0:00eec4d97228 388 if (chord=='F') {
alexanderh 0:00eec4d97228 389 notes[0] = 'a';
alexanderh 0:00eec4d97228 390 notes[1] = 'c';
alexanderh 0:00eec4d97228 391 notes[2] = 'f';
alexanderh 0:00eec4d97228 392 }
alexanderh 0:00eec4d97228 393 if (chord=='G') {
alexanderh 0:00eec4d97228 394 notes[0] = 'g';
alexanderh 0:00eec4d97228 395 notes[1] = 'b';
alexanderh 0:00eec4d97228 396 notes[2] = 'd';
alexanderh 0:00eec4d97228 397 }
alexanderh 0:00eec4d97228 398 if (chord=='d') {
alexanderh 0:00eec4d97228 399 notes[0] = 'a';
alexanderh 0:00eec4d97228 400 notes[1] = 'd';
alexanderh 0:00eec4d97228 401 notes[2] = 'f';
alexanderh 0:00eec4d97228 402 }
alexanderh 0:00eec4d97228 403 if (chord=='e') {
alexanderh 0:00eec4d97228 404 notes[0] = 'g';
alexanderh 0:00eec4d97228 405 notes[1] = 'b';
alexanderh 0:00eec4d97228 406 notes[2] = 'e';
alexanderh 0:00eec4d97228 407 }
alexanderh 0:00eec4d97228 408 }
alexanderh 0:00eec4d97228 409
alexanderh 0:00eec4d97228 410
alexanderh 3:2cd5dfcad0e6 411 /**
alexanderh 0:00eec4d97228 412 *
alexanderh 1:9cc595290b2f 413 * Gets the frequency of the note
alexanderh 0:00eec4d97228 414 *
alexanderh 1:9cc595290b2f 415 * @param note the note
alexanderh 0:00eec4d97228 416 *
alexanderh 1:9cc595290b2f 417 * @return the frequency as float
alexanderh 0:00eec4d97228 418 */
alexanderh 0:00eec4d97228 419 float getFq(char note, bool sharp)
alexanderh 0:00eec4d97228 420 {
alexanderh 0:00eec4d97228 421 if(!sharp ) {
alexanderh 0:00eec4d97228 422 if (note=='a') {
alexanderh 0:00eec4d97228 423 return 880*masterscale;
alexanderh 0:00eec4d97228 424 }
alexanderh 0:00eec4d97228 425 if (note=='b') {
alexanderh 0:00eec4d97228 426 return 987.76*masterscale;
alexanderh 0:00eec4d97228 427 }
alexanderh 0:00eec4d97228 428 if (note=='c') {
alexanderh 0:00eec4d97228 429 return 1046.5*masterscale;
alexanderh 0:00eec4d97228 430 }
alexanderh 0:00eec4d97228 431 if (note=='d') {
alexanderh 0:00eec4d97228 432 return 1174.66*masterscale;
alexanderh 0:00eec4d97228 433 }
alexanderh 0:00eec4d97228 434 if (note=='e') {
alexanderh 0:00eec4d97228 435 return 1318.51*masterscale;
alexanderh 0:00eec4d97228 436 }
alexanderh 0:00eec4d97228 437 if (note=='f') {
alexanderh 0:00eec4d97228 438 return 1396.91*masterscale;
alexanderh 0:00eec4d97228 439 }
alexanderh 0:00eec4d97228 440 if (note=='g') {
alexanderh 0:00eec4d97228 441 return 1567.98*masterscale;
alexanderh 0:00eec4d97228 442 }
alexanderh 0:00eec4d97228 443
alexanderh 0:00eec4d97228 444 //Sharps #
alexanderh 0:00eec4d97228 445 } else {
alexanderh 0:00eec4d97228 446 if (note=='f') {
alexanderh 0:00eec4d97228 447 return 1479.98*masterscale;
alexanderh 0:00eec4d97228 448 }
alexanderh 0:00eec4d97228 449 }
alexanderh 0:00eec4d97228 450 return 0;
alexanderh 0:00eec4d97228 451 }
alexanderh 0:00eec4d97228 452