Custom Midi Controller

A midi controller designed specifically for TAL U No LX soft synth

Oct 14, 2024

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10kOhm potentiometer

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Project description

Code

Midi Controller

cpp

Code for midi controller with 2 multiplexers

1#include "MIDIUSB.h"
2
3
4
5// constants for selecting multiplexer1 pins
6const int selectPins[4] = {13, 12, 11, 10}; // S0~12, S1~11, S2~10 S3~9
7const int zInput = 9;
8
9
10// constants for selecting multiplexer2 pins
11const int select2Pins[4] = {4, 5, 6, 7}; // S0~2, S1~3, S2~4 S3~5
12const int z2Input = A3;
13
14
15//constants for midichannel
16const uint8_t midiChannel = 0;
17
18//constants for pots and switches that are connected straight to the Arduino input pins (not using multiplexers)
19const int potSPREAD = A2;
20const int potTONE = A5;
21const int potFBD = A4;
22const int potTIME = A1;
23const int potWET = A0;
24const int switchCHORUSII = 2;
25const int switchCHORUSI = 1;
26
27
28//variables to set the initial state of the peripherals
29int sliderLFOState = 0;
30int sliderPWState = 0;
31int sliderSUBOSCState = 0;
32int sliderNOISEState = 0;
33int sliderHPFState = 0;
34int sliderVCFState = 0;
35int sliderRESState = 0;
36int sliderENVState = 0;
37int sliderMODState = 0;
38int sliderKEYBState = 0;
39int sliderAState = 0;
40int sliderDState = 0;
41int sliderSState = 0;
42int sliderRState = 0;
43int sliderRATEState = 0;
44int sliderDELAYState = 0;
45int sliderTIMEState = 0;
46int sliderPWDCOState = 0;
47int sliderPWFILTERState = 0;
48int sliderVELENVState = 0;
49int sliderVELVOLUMEState = 0;
50int sliderPORTAMENTOTIMEState = 0;
51
52int potWETState = 0;
53int potTIMEState = 0;
54int potSPREADState = 0;
55int potTONEState = 0;
56int potFBDState = 0;
57
58int switchENVINVERTState = 0;
59int switchPWState = 0;
60int switchPULSEState = 0;
61int switchSAWState = 0;
62int switchSQUAREState = 0;
63int switchLFOWAVEState = 0;
64int switchLFOState = 0;
65int switchEFFECTState = 0;
66int switchPORTAMENTOState = 0;
67int SwitchCHORUSIIState = 0;
68int SwitchCHORUSIState = 0;
69
70
71
72//seting variables that define the smallest change in value of analog peripherals (pots and sliders) that will trigger a response from the Arduino
73int actionTresholdMax;
74int actionTresholdMin;
75
76uint8_t midiCCValue;
77
78//variables to set the initial state for debouncing the swithches and buttons
79int lastSwitchPULSEState = 0;
80int lastSwitchSAWState = 0;
81int lastSwitchSQUAREState = 0;
82int lastSwitchLFOWAVEState = 0;
83int lastSwitchPWState = 0;
84int lastSwitchLFOState = 0;
85int lastSwitchEFFECTState = 0;
86int lastSwitchPORTAMENTOState = 0;
87int lastSwitchCHORUSIIState = 0 ;
88int lastSwitchCHORUSIState = 0 ;
89
90// variables to set the initial state of debouncing timers. usingned long needed here as the numbers get bit very quickly
91unsigned long lastDebounceTimeENVINVERT = 0;  // the last time the output pin was toggled
92unsigned long lastDebounceTimeSwitchPULSE = 0;
93unsigned long lastDebounceTimeSwitchSaw = 0;
94unsigned long lastDebounceTimeSwitchSQUARE = 0;
95unsigned long lastDebounceTimeSwitchPW = 0;
96unsigned long lastDebounceTimeSwitchLFOWAVE = 0;
97unsigned long lastDebounceTimeSwitchLFO = 0;
98unsigned long lastDebounceTimeSwitchEFFECT = 0;
99unsigned long lastDebounceTimeSwitchPORTAMENTO = 0;
100unsigned long lastDebounceTimeSwitchCHORUSII = 0;
101unsigned long lastDebounceTimeSwitchCHORUSI = 0;
102
103unsigned long debounceDelay = 50;    // the debounce time; increase if the output flickers
104
105
106
107
108
109
110void setup()
111{
112
113  for (int i = 0; i < 4; i++)
114  {
115    pinMode(selectPins[i], OUTPUT);  // Set up the select pins as outputs:
116    digitalWrite(selectPins[i], HIGH);
117  }
118  pinMode(zInput, INPUT); // Set up Zinput as an input
119
120
121  for (int k = 0; k < 4; k++)
122  {
123    pinMode(select2Pins[k], OUTPUT);  // Set up the select pins as outputs:
124    digitalWrite(select2Pins[k], HIGH);
125  }
126  pinMode(z2Input, INPUT); // Set up z2input as an input
127
128
129}
130
131void loop() {
132
133
134
135
136
137
138  byte muxPin = 1;
139  selectMuxPin(muxPin); // Select the channel of the multiplexer you are reading
140  int readingSliderKEYB = analogRead(zInput); // and read Zinput
141  midiCCValue = (readingSliderKEYB / 8);  // changing the analog reading to 7-bit (0-127) value suitable for midi message
142  if (readingSliderKEYB > (sliderKEYBState + 4)  or readingSliderKEYB < (sliderKEYBState - 4))  // if the value is >4 bigger or smaller than the last saved value of the slider, then
143  {
144    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 11, midiCCValue};
145    MidiUSB.sendMIDI(event);
146    sliderKEYBState = readingSliderKEYB;
147  }                                                       // the value is prepared to be send as a 7-bit midi-message in the set midichannel and saved as a new value of the slider
148
149
150
151  muxPin = 2;
152  selectMuxPin(muxPin); 
153  int readingSliderMOD = analogRead(zInput); 
154  midiCCValue = (readingSliderMOD / 8);
155  if (readingSliderMOD > (sliderMODState + 4)  or readingSliderMOD < (sliderMODState - 4))
156  {
157    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 12, midiCCValue};
158    MidiUSB.sendMIDI(event);
159    sliderMODState = readingSliderMOD;
160  }
161
162
163  muxPin = 3;
164  selectMuxPin(muxPin); 
165  int readingSliderENV = analogRead(zInput); 
166  midiCCValue = (readingSliderENV / 8);
167  if (readingSliderENV > (sliderENVState + 4)  or readingSliderENV < (sliderENVState - 4))
168  {
169    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 13, midiCCValue};
170    MidiUSB.sendMIDI(event);
171    sliderENVState = readingSliderENV;
172  }
173
174
175
176  muxPin = 4;
177  selectMuxPin(muxPin); 
178  int readingSliderRES = analogRead(zInput); 
179  midiCCValue = (readingSliderRES / 8);
180  if (readingSliderRES > (sliderRESState + 4)  or readingSliderRES < (sliderRESState - 4))
181  {
182    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 14, midiCCValue};
183    MidiUSB.sendMIDI(event);
184    sliderRESState = readingSliderRES;
185  }
186
187
188  muxPin = 5;
189  selectMuxPin(muxPin); 
190  int readingSliderVCF = analogRead(zInput); 
191  midiCCValue = (readingSliderVCF / 8);
192  if (readingSliderVCF > (sliderVCFState + 4)  or readingSliderVCF < (sliderVCFState - 4))
193  {
194    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 15, midiCCValue};
195    MidiUSB.sendMIDI(event);
196    sliderVCFState = readingSliderVCF;
197  }
198
199
200
201  muxPin = 6;
202  selectMuxPin(muxPin); 
203  int readingSliderHPF = analogRead(zInput); 
204  midiCCValue = (readingSliderHPF / 8);
205  if (readingSliderHPF > (sliderHPFState + 4)  or readingSliderHPF < (sliderHPFState - 4))
206  {
207    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 16, midiCCValue};
208    MidiUSB.sendMIDI(event);
209    sliderHPFState = readingSliderHPF;
210  }
211
212
213  muxPin = 7;
214  selectMuxPin(muxPin); 
215  int readingSliderNOISE = analogRead(zInput); 
216  midiCCValue = (readingSliderNOISE / 8);
217  if (readingSliderNOISE > (sliderNOISEState + 4)  or readingSliderNOISE < (sliderNOISEState - 4))
218  {
219    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 17, midiCCValue};
220    MidiUSB.sendMIDI(event);
221    sliderNOISEState = readingSliderNOISE;
222  }
223
224
225
226
227
228  muxPin = 8;
229  selectMuxPin(muxPin); 
230  int readingSwitchPULSE = digitalRead(zInput); 
231  if (readingSwitchPULSE != lastSwitchPULSEState)
232  {
233    lastDebounceTimeSwitchPULSE = millis();  // debouncing the switch. reset the debouncing timer
234  }
235  if ((millis() - lastDebounceTimeSwitchPULSE) > debounceDelay) // If more that 50 ms has passed since the reading was different from last recorder state...
236  {
237    if (readingSwitchPULSE != switchPULSEState) // confirm the change of digital value is real
238    {
239      switchPULSEState = readingSwitchPULSE;
240      if (switchPULSEState == LOW)
241      {
242        midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 18, 127};
243        MidiUSB.sendMIDI(event);
244      }
245      else
246      {
247        midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 18, 0};
248        MidiUSB.sendMIDI(event);
249      }
250    }
251  }
252
253  lastSwitchPULSEState  = switchPULSEState;
254
255
256
257
258
259  muxPin = 9;
260  selectMuxPin(muxPin);
261  int readingSwitchSAW = digitalRead(zInput);
262  if (readingSwitchSAW != lastSwitchSAWState)
263  {
264    lastDebounceTimeSwitchSaw = millis();
265  }
266  if ((millis() - lastDebounceTimeSwitchSaw) > debounceDelay)
267  {
268    if (readingSwitchSAW != switchSAWState)
269    {
270      switchSAWState = readingSwitchSAW;
271      if (switchSAWState == LOW)
272      {
273        midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 19, 127};
274        MidiUSB.sendMIDI(event);
275      }
276      else
277      {
278        midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 19, 0};
279        MidiUSB.sendMIDI(event);
280      }
281    }
282  }
283
284  lastSwitchSAWState  = readingSwitchSAW;
285
286
287
288
289
290  muxPin = 10;
291  selectMuxPin(muxPin); 
292  int readingSwitchSQUARE = digitalRead(zInput); 
293
294  if (readingSwitchSQUARE != lastSwitchSQUAREState)
295  {
296    lastDebounceTimeSwitchSQUARE = millis();  
297  }
298  if ((millis() - lastDebounceTimeSwitchSQUARE) > debounceDelay)
299  {
300    if (readingSwitchSQUARE != switchSQUAREState)
301    {
302      switchSQUAREState = readingSwitchSQUARE;
303      if (switchSQUAREState == LOW)
304      {
305        midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 20, 127};
306        MidiUSB.sendMIDI(event);
307      }
308      else
309      {
310        midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 20, 0};
311        MidiUSB.sendMIDI(event);
312      }
313    }
314  }
315
316  lastSwitchSQUAREState  = readingSwitchSQUARE;
317
318
319  muxPin = 11;
320  selectMuxPin(muxPin); // Select one at a time
321  int readingSliderSUBOSC = analogRead(zInput); // and read Z
322  midiCCValue = (readingSliderSUBOSC / 8);
323  if (readingSliderSUBOSC > (sliderSUBOSCState + 4)  or readingSliderSUBOSC < (sliderSUBOSCState - 4))
324  {
325    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 21, midiCCValue};
326    MidiUSB.sendMIDI(event);
327    sliderSUBOSCState = readingSliderSUBOSC;
328  }
329
330
331  muxPin = 12;
332  selectMuxPin(muxPin); 
333  int readingSliderPW = analogRead(zInput); 
334  midiCCValue = (readingSliderPW / 8);
335  if (readingSliderPW > (sliderPWState + 4)  or readingSliderPW < (sliderPWState - 4))
336  {
337    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 22, midiCCValue};
338    MidiUSB.sendMIDI(event);
339    sliderPWState = readingSliderPW;
340  }
341
342
343  muxPin = 13;
344  selectMuxPin(muxPin); 
345  int readingSwitchPW = analogRead(zInput);
346
347  if (abs (readingSwitchPW - lastSwitchPWState) > 160)
348  {
349    lastDebounceTimeSwitchPW = millis();
350  }
351  if ((millis() - lastDebounceTimeSwitchPW) > debounceDelay) 
352  {
353    if (abs (readingSwitchPW - switchPWState) > 160)
354
355    { switchPWState = readingSwitchPW;
356
357      midiCCValue = (readingSwitchPW / 8);
358
359      midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 23, midiCCValue};
360      MidiUSB.sendMIDI(event);
361    }
362  }
363
364  lastSwitchPWState = readingSwitchPW;
365
366
367
368
369
370
371
372
373  muxPin = 14;
374  selectMuxPin(muxPin); 
375  int readingSliderLFO = analogRead(zInput); 
376  midiCCValue = (readingSliderLFO / 8);
377  if (readingSliderLFO > (sliderLFOState + 4)  or readingSliderLFO < (sliderLFOState - 4))
378  {
379    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 24, midiCCValue};
380    MidiUSB.sendMIDI(event);
381    sliderLFOState = readingSliderLFO;
382  }
383
384
385  muxPin = 15;
386  selectMuxPin(muxPin); 
387  int readingSwitchLFOWAVE = analogRead(zInput);
388  midiCCValue = (readingSwitchLFOWAVE / 8);
389  if (abs (readingSwitchLFOWAVE - lastSwitchLFOWAVEState) > 80)
390  {
391    lastDebounceTimeSwitchLFOWAVE = millis(); 
392  }
393  if ((millis() - lastDebounceTimeSwitchLFOWAVE) > debounceDelay) 
394  {
395    if (abs (readingSwitchLFOWAVE - switchLFOWAVEState) > 80)
396
397
398    {
399      midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 25, midiCCValue};
400      MidiUSB.sendMIDI(event);
401      switchLFOWAVEState = readingSwitchLFOWAVE;
402    }
403  }
404
405  lastSwitchLFOWAVEState = readingSwitchLFOWAVE ;
406
407
408
409
410
411
412
413  byte mux2Pin = 0;
414  selectMux2Pin(mux2Pin);
415  int readingSliderA = analogRead(z2Input); 
416  midiCCValue = (readingSliderA / 8);
417  if (readingSliderA > (sliderAState + 4)  or readingSliderA < (sliderAState - 4))
418  {
419    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 26, midiCCValue};
420    MidiUSB.sendMIDI(event);
421    sliderAState = readingSliderA;
422  }
423
424  mux2Pin = 1;
425  selectMux2Pin(mux2Pin); 
426  int readingSliderD = analogRead(z2Input); 
427  midiCCValue = (readingSliderD / 8);
428  if (readingSliderD > (sliderDState + 4)  or readingSliderD < (sliderDState - 4))
429  {
430    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 27, midiCCValue};
431    MidiUSB.sendMIDI(event);
432    sliderDState = readingSliderD;
433  }
434
435
436  mux2Pin = 2;
437  selectMux2Pin(mux2Pin); 
438  int readingSliderS = analogRead(z2Input); 
439  midiCCValue = (readingSliderS / 8);
440  if (readingSliderS > (sliderSState + 4)  or readingSliderS < (sliderSState - 4))
441  {
442    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 28, midiCCValue};
443    MidiUSB.sendMIDI(event);
444    sliderSState = readingSliderS;
445  }
446
447
448
449  mux2Pin = 3;
450  selectMux2Pin(mux2Pin); 
451  int readingSliderR = analogRead(z2Input); 
452  midiCCValue = (readingSliderR / 8);
453  if (readingSliderR > (sliderRState + 4)  or readingSliderR < (sliderRState - 4))
454  {
455    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 29, midiCCValue};
456    MidiUSB.sendMIDI(event);
457    sliderRState = readingSliderR;
458  }
459
460
461  mux2Pin = 4;
462  selectMux2Pin(mux2Pin); 
463  int readingSliderRATE = analogRead(z2Input); 
464  midiCCValue = (readingSliderRATE / 8);
465  if (readingSliderRATE > (sliderRATEState + 4)  or readingSliderRATE < (sliderRATEState - 4))
466  {
467    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 30, midiCCValue};
468    MidiUSB.sendMIDI(event);
469    sliderRATEState = readingSliderRATE;
470  }
471
472
473
474  mux2Pin = 5;
475  selectMux2Pin(mux2Pin); 
476  int readingSliderDELAY = analogRead(z2Input);
477  midiCCValue = (readingSliderDELAY / 8);
478  if (readingSliderDELAY > (sliderDELAYState + 4)  or readingSliderDELAY < (sliderDELAYState - 4))
479  {
480    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 31, midiCCValue};
481    MidiUSB.sendMIDI(event);
482    sliderDELAYState = readingSliderDELAY;
483  }
484
485
486
487
488  mux2Pin = 6;
489  selectMux2Pin(mux2Pin); 
490  int readingSwitchLFO = analogRead(zInput);
491  midiCCValue = (readingSwitchLFO / 8);
492  if (readingSwitchLFO > (lastSwitchLFOState + 160)  or readingSwitchLFO < (lastSwitchLFOState - 160))
493  {
494    lastDebounceTimeSwitchLFO = millis();
495  }
496  if ((millis() - lastDebounceTimeSwitchLFO) > debounceDelay) 
497  {
498    if (readingSwitchLFO > (switchLFOState + 160)  or readingSwitchLFO < (switchLFOState - 160))
499
500    { switchLFOState = readingSwitchLFO;
501
502
503      midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 32, midiCCValue};
504      MidiUSB.sendMIDI(event);
505
506    }
507  }
508
509  lastSwitchLFOState = readingSwitchLFO;
510
511
512
513
514
515
516
517
518  mux2Pin = 7;
519  selectMux2Pin(mux2Pin);
520  int readingSwitchEFFECT = analogRead(z2Input);
521  midiCCValue = (readingSwitchEFFECT / 8) ;
522  if (readingSwitchEFFECT > (lastSwitchEFFECTState + 160)  or readingSwitchEFFECT < (lastSwitchEFFECTState - 160))
523  {
524    lastDebounceTimeSwitchEFFECT = millis();
525  }
526  if ((millis() - lastDebounceTimeSwitchEFFECT) > debounceDelay) 
527  {
528
529    if (readingSwitchEFFECT > (switchEFFECTState + 160)  or readingSwitchEFFECT < (switchEFFECTState - 160))
530
531    { switchEFFECTState = readingSwitchEFFECT;
532
533      midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 33, midiCCValue};
534      MidiUSB.sendMIDI(event);
535    }
536  }
537
538  lastSwitchEFFECTState = readingSwitchEFFECT;
539
540
541
542  mux2Pin = 8;
543  selectMux2Pin(mux2Pin); 
544  int readingSliderVELVOLUME = analogRead(z2Input); 
545  midiCCValue = (readingSliderVELVOLUME / 8);
546  if (readingSliderVELVOLUME > (sliderVELVOLUMEState + 4)  or readingSliderVELVOLUME < (sliderVELVOLUMEState - 4))
547  {
548    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 34, midiCCValue};
549    MidiUSB.sendMIDI(event);
550    sliderVELVOLUMEState = readingSliderVELVOLUME;
551  }
552
553
554
555  mux2Pin = 11;
556  selectMux2Pin(mux2Pin); 
557  int readingSwitchPORTAMENTO = analogRead(zInput);
558  midiCCValue = (readingSwitchPORTAMENTO / 8);
559
560  if (abs (readingSwitchPORTAMENTO - lastSwitchPORTAMENTOState) > 160)
561  {
562    lastDebounceTimeSwitchPORTAMENTO = millis();
563  }
564  if ((millis() - lastDebounceTimeSwitchPORTAMENTO) > debounceDelay) 
565  {
566    if (abs (readingSwitchPORTAMENTO - switchPORTAMENTOState) > 160)
567
568    { switchPORTAMENTOState = readingSwitchPORTAMENTO;
569
570
571
572      midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 35, midiCCValue};
573      MidiUSB.sendMIDI(event);
574    }
575  }
576
577  lastSwitchPORTAMENTOState = readingSwitchPORTAMENTO;
578
579
580
581  mux2Pin = 12;
582  selectMux2Pin(mux2Pin); 
583  int readingSliderPORTAMENTOTIME = analogRead(z2Input); 
584  midiCCValue = (readingSliderPORTAMENTOTIME / 8);
585  if (readingSliderPORTAMENTOTIME > (sliderPORTAMENTOTIMEState + 4)  or readingSliderPORTAMENTOTIME < (sliderPORTAMENTOTIMEState - 4))
586  {
587    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 36, midiCCValue};
588    MidiUSB.sendMIDI(event);
589    sliderPORTAMENTOTIMEState = readingSliderPORTAMENTOTIME;
590  }
591
592
593  mux2Pin = 13;
594  selectMux2Pin(mux2Pin); 
595  int readingSliderPWDCO = analogRead(z2Input); 
596  midiCCValue = (readingSliderPWDCO / 8);
597  if (readingSliderPWDCO > (sliderPWDCOState + 4)  or readingSliderPWDCO < (sliderPWDCOState - 4))
598  {
599    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 37, midiCCValue};
600    MidiUSB.sendMIDI(event);
601    sliderPWDCOState = readingSliderPWDCO;
602  }
603
604
605  mux2Pin = 14;
606  selectMux2Pin(mux2Pin);
607  int readingSliderPWFILTER = analogRead(z2Input); 
608  midiCCValue = (readingSliderPWFILTER / 8);
609  if (readingSliderPWFILTER > (sliderPWFILTERState + 4)  or readingSliderPWFILTER < (sliderPWFILTERState - 4))
610  {
611    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 38, midiCCValue};
612    MidiUSB.sendMIDI(event);
613    sliderPWFILTERState = readingSliderPWFILTER;
614  }
615
616
617  mux2Pin = 15;
618  selectMux2Pin(mux2Pin); 
619  int readingSliderVELENV = analogRead(z2Input); 
620  midiCCValue = (readingSliderVELENV / 8);
621  if (readingSliderVELENV > (sliderVELENVState + 4)  or readingSliderVELENV < (sliderVELENVState - 4))
622  {
623    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 39, midiCCValue};
624    MidiUSB.sendMIDI(event);
625    sliderVELENVState = readingSliderVELENV;
626  }
627
628
629
630
631  int readingPotSPREAD = analogRead(potSPREAD);
632  midiCCValue = (readingPotSPREAD / 8);
633  if (readingPotSPREAD > (potSPREADState + 20)  or readingPotSPREAD < (potSPREADState - 20))
634  {
635    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 40, midiCCValue};
636    MidiUSB.sendMIDI(event);
637    potSPREADState = readingPotSPREAD;
638  }
639
640
641
642
643
644  int readingPotTIME = analogRead(potTIME);
645  midiCCValue = (readingPotTIME / 8);
646  if (readingPotTIME > (potTIMEState + 4)  or readingPotTIME < (potTIMEState - 4))
647  {
648    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 43, midiCCValue};
649    MidiUSB.sendMIDI(event);
650    potTIMEState = readingPotTIME;
651  }
652
653
654
655  int readingPotWET = analogRead(potWET);
656  midiCCValue = (readingPotWET / 8);
657  if (readingPotWET > (potWETState + 4)  or readingPotWET < (potWETState - 4))
658  {
659    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 44, midiCCValue};
660    MidiUSB.sendMIDI(event);
661    potWETState = readingPotWET;
662  }
663
664
665  int readingSwitchCHORUSII = digitalRead(switchCHORUSII);    // read the state of the switch into a local variable:
666  if (readingSwitchCHORUSII != lastSwitchCHORUSIIState) // if reading is different from last recorded state
667  {
668    lastDebounceTimeSwitchCHORUSII = millis();  // reset the debouncing timer
669  }
670  if ((millis() - lastDebounceTimeSwitchCHORUSII) > debounceDelay) // If more that 50 ms has passed since the reading was different from last recorder state...
671  {
672    if (readingSwitchCHORUSII != SwitchCHORUSIIState) //... and the reading still is different from the last recorded state...
673    {
674      SwitchCHORUSIIState = readingSwitchCHORUSII; // ...we believe it's genuine and update the buttonState...
675
676      if (SwitchCHORUSIIState == LOW)
677      {
678        midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 45, 127};
679        MidiUSB.sendMIDI(event);
680      }
681      else
682      {
683        midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 45, 0};
684        MidiUSB.sendMIDI(event);
685      }
686    }
687  }
688
689  lastSwitchCHORUSIIState = readingSwitchCHORUSII;   
690
691
692  int readingSwitchCHORUSI = digitalRead(switchCHORUSI);   
693  if (readingSwitchCHORUSI != lastSwitchCHORUSIState) 
694  {
695    lastDebounceTimeSwitchCHORUSI = millis();  
696  }
697  if ((millis() - lastDebounceTimeSwitchCHORUSI) > debounceDelay) 
698  {
699    if (readingSwitchCHORUSI != SwitchCHORUSIState) 
700    {
701      SwitchCHORUSIState = readingSwitchCHORUSI;
702
703      if (SwitchCHORUSIState == LOW)
704      {
705        midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 46, 127};
706        MidiUSB.sendMIDI(event);
707      }
708      else
709      {
710        midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 46, 0};
711        MidiUSB.sendMIDI(event);
712      }
713    }
714  }
715
716  lastSwitchCHORUSIState = readingSwitchCHORUSI;    // save the reading. Next time through the loop, it'll be the lastButtonState:
717
718
719
720  MidiUSB.flush();
721
722}
723
724
725
726// The selectMuxPin function sets the S0, S1, and S2 pins
727// accordingly, given a pin from 0-7.
728void selectMuxPin(byte muxPin)
729{
730  for (int i = 0; i < 4; i++)
731  {
732    if (muxPin & (1 << i))
733      digitalWrite(selectPins[i], HIGH);
734    else
735      digitalWrite(selectPins[i], LOW);
736  }
737}
738
739
740void selectMux2Pin(byte mux2Pin)
741{
742  for (int i = 0; i < 4; i++)
743  {
744    if (mux2Pin & (1 << i))
745      digitalWrite(select2Pins[i], HIGH);
746    else
747      digitalWrite(select2Pins[i], LOW);
748  }
749}

#include "MIDIUSB.h"



// constants for selecting multiplexer1 pins
const int selectPins[4] = {13, 12, 11, 10}; // S0~12, S1~11, S2~10 S3~9
const int zInput = 9;


// constants for selecting multiplexer2 pins
const int select2Pins[4] = {4, 5, 6, 7}; // S0~2, S1~3, S2~4 S3~5
const int z2Input = A3;


//constants for midichannel
const uint8_t midiChannel = 0;

//constants for pots and switches that are connected straight to the Arduino input pins (not using multiplexers)
const int potSPREAD = A2;
const int potTONE = A5;
const int potFBD = A4;
const int potTIME = A1;
const int potWET = A0;
const int switchCHORUSII = 2;
const int switchCHORUSI = 1;


//variables to set the initial state of the peripherals
int sliderLFOState = 0;
int sliderPWState = 0;
int sliderSUBOSCState = 0;
int sliderNOISEState = 0;
int sliderHPFState = 0;
int sliderVCFState = 0;
int sliderRESState = 0;
int sliderENVState = 0;
int sliderMODState = 0;
int sliderKEYBState = 0;
int sliderAState = 0;
int sliderDState = 0;
int sliderSState = 0;
int sliderRState = 0;
int sliderRATEState = 0;
int sliderDELAYState = 0;
int sliderTIMEState = 0;
int sliderPWDCOState = 0;
int sliderPWFILTERState = 0;
int sliderVELENVState = 0;
int sliderVELVOLUMEState = 0;
int sliderPORTAMENTOTIMEState = 0;

int potWETState = 0;
int potTIMEState = 0;
int potSPREADState = 0;
int potTONEState = 0;
int potFBDState = 0;

int switchENVINVERTState = 0;
int switchPWState = 0;
int switchPULSEState = 0;
int switchSAWState = 0;
int switchSQUAREState = 0;
int switchLFOWAVEState = 0;
int switchLFOState = 0;
int switchEFFECTState = 0;
int switchPORTAMENTOState = 0;
int SwitchCHORUSIIState = 0;
int SwitchCHORUSIState = 0;



//seting variables that define the smallest change in value of analog peripherals (pots and sliders) that will trigger a response from the Arduino
int actionTresholdMax;
int actionTresholdMin;

uint8_t midiCCValue;

//variables to set the initial state for debouncing the swithches and buttons
int lastSwitchPULSEState = 0;
int lastSwitchSAWState = 0;
int lastSwitchSQUAREState = 0;
int lastSwitchLFOWAVEState = 0;
int lastSwitchPWState = 0;
int lastSwitchLFOState = 0;
int lastSwitchEFFECTState = 0;
int lastSwitchPORTAMENTOState = 0;
int lastSwitchCHORUSIIState = 0 ;
int lastSwitchCHORUSIState = 0 ;

// variables to set the initial state of debouncing timers. usingned long needed here as the numbers get bit very quickly
unsigned long lastDebounceTimeENVINVERT = 0;  // the last time the output pin was toggled
unsigned long lastDebounceTimeSwitchPULSE = 0;
unsigned long lastDebounceTimeSwitchSaw = 0;
unsigned long lastDebounceTimeSwitchSQUARE = 0;
unsigned long lastDebounceTimeSwitchPW = 0;
unsigned long lastDebounceTimeSwitchLFOWAVE = 0;
unsigned long lastDebounceTimeSwitchLFO = 0;
unsigned long lastDebounceTimeSwitchEFFECT = 0;
unsigned long lastDebounceTimeSwitchPORTAMENTO = 0;
unsigned long lastDebounceTimeSwitchCHORUSII = 0;
unsigned long lastDebounceTimeSwitchCHORUSI = 0;

unsigned long debounceDelay = 50;    // the debounce time; increase if the output flickers






void setup()
{

  for (int i = 0; i < 4; i++)
  {
    pinMode(selectPins[i], OUTPUT);  // Set up the select pins as outputs:
    digitalWrite(selectPins[i], HIGH);
  }
  pinMode(zInput, INPUT); // Set up Zinput as an input


  for (int k = 0; k < 4; k++)
  {
    pinMode(select2Pins[k], OUTPUT);  // Set up the select pins as outputs:
    digitalWrite(select2Pins[k], HIGH);
  }
  pinMode(z2Input, INPUT); // Set up z2input as an input


}

void loop() {






  byte muxPin = 1;
  selectMuxPin(muxPin); // Select the channel of the multiplexer you are reading
  int readingSliderKEYB = analogRead(zInput); // and read Zinput
  midiCCValue = (readingSliderKEYB / 8);  // changing the analog reading to 7-bit (0-127) value suitable for midi message
  if (readingSliderKEYB > (sliderKEYBState + 4)  or readingSliderKEYB < (sliderKEYBState - 4))  // if the value is >4 bigger or smaller than the last saved value of the slider, then
  {
    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 11, midiCCValue};
    MidiUSB.sendMIDI(event);
    sliderKEYBState = readingSliderKEYB;
  }                                                       // the value is prepared to be send as a 7-bit midi-message in the set midichannel and saved as a new value of the slider



  muxPin = 2;
  selectMuxPin(muxPin); 
  int readingSliderMOD = analogRead(zInput); 
  midiCCValue = (readingSliderMOD / 8);
  if (readingSliderMOD > (sliderMODState + 4)  or readingSliderMOD < (sliderMODState - 4))
  {
    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 12, midiCCValue};
    MidiUSB.sendMIDI(event);
    sliderMODState = readingSliderMOD;
  }


  muxPin = 3;
  selectMuxPin(muxPin); 
  int readingSliderENV = analogRead(zInput); 
  midiCCValue = (readingSliderENV / 8);
  if (readingSliderENV > (sliderENVState + 4)  or readingSliderENV < (sliderENVState - 4))
  {
    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 13, midiCCValue};
    MidiUSB.sendMIDI(event);
    sliderENVState = readingSliderENV;
  }



  muxPin = 4;
  selectMuxPin(muxPin); 
  int readingSliderRES = analogRead(zInput); 
  midiCCValue = (readingSliderRES / 8);
  if (readingSliderRES > (sliderRESState + 4)  or readingSliderRES < (sliderRESState - 4))
  {
    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 14, midiCCValue};
    MidiUSB.sendMIDI(event);
    sliderRESState = readingSliderRES;
  }


  muxPin = 5;
  selectMuxPin(muxPin); 
  int readingSliderVCF = analogRead(zInput); 
  midiCCValue = (readingSliderVCF / 8);
  if (readingSliderVCF > (sliderVCFState + 4)  or readingSliderVCF < (sliderVCFState - 4))
  {
    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 15, midiCCValue};
    MidiUSB.sendMIDI(event);
    sliderVCFState = readingSliderVCF;
  }



  muxPin = 6;
  selectMuxPin(muxPin); 
  int readingSliderHPF = analogRead(zInput); 
  midiCCValue = (readingSliderHPF / 8);
  if (readingSliderHPF > (sliderHPFState + 4)  or readingSliderHPF < (sliderHPFState - 4))
  {
    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 16, midiCCValue};
    MidiUSB.sendMIDI(event);
    sliderHPFState = readingSliderHPF;
  }


  muxPin = 7;
  selectMuxPin(muxPin); 
  int readingSliderNOISE = analogRead(zInput); 
  midiCCValue = (readingSliderNOISE / 8);
  if (readingSliderNOISE > (sliderNOISEState + 4)  or readingSliderNOISE < (sliderNOISEState - 4))
  {
    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 17, midiCCValue};
    MidiUSB.sendMIDI(event);
    sliderNOISEState = readingSliderNOISE;
  }





  muxPin = 8;
  selectMuxPin(muxPin); 
  int readingSwitchPULSE = digitalRead(zInput); 
  if (readingSwitchPULSE != lastSwitchPULSEState)
  {
    lastDebounceTimeSwitchPULSE = millis();  // debouncing the switch. reset the debouncing timer
  }
  if ((millis() - lastDebounceTimeSwitchPULSE) > debounceDelay) // If more that 50 ms has passed since the reading was different from last recorder state...
  {
    if (readingSwitchPULSE != switchPULSEState) // confirm the change of digital value is real
    {
      switchPULSEState = readingSwitchPULSE;
      if (switchPULSEState == LOW)
      {
        midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 18, 127};
        MidiUSB.sendMIDI(event);
      }
      else
      {
        midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 18, 0};
        MidiUSB.sendMIDI(event);
      }
    }
  }

  lastSwitchPULSEState  = switchPULSEState;





  muxPin = 9;
  selectMuxPin(muxPin);
  int readingSwitchSAW = digitalRead(zInput);
  if (readingSwitchSAW != lastSwitchSAWState)
  {
    lastDebounceTimeSwitchSaw = millis();
  }
  if ((millis() - lastDebounceTimeSwitchSaw) > debounceDelay)
  {
    if (readingSwitchSAW != switchSAWState)
    {
      switchSAWState = readingSwitchSAW;
      if (switchSAWState == LOW)
      {
        midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 19, 127};
        MidiUSB.sendMIDI(event);
      }
      else
      {
        midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 19, 0};
        MidiUSB.sendMIDI(event);
      }
    }
  }

  lastSwitchSAWState  = readingSwitchSAW;





  muxPin = 10;
  selectMuxPin(muxPin); 
  int readingSwitchSQUARE = digitalRead(zInput); 

  if (readingSwitchSQUARE != lastSwitchSQUAREState)
  {
    lastDebounceTimeSwitchSQUARE = millis();  
  }
  if ((millis() - lastDebounceTimeSwitchSQUARE) > debounceDelay)
  {
    if (readingSwitchSQUARE != switchSQUAREState)
    {
      switchSQUAREState = readingSwitchSQUARE;
      if (switchSQUAREState == LOW)
      {
        midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 20, 127};
        MidiUSB.sendMIDI(event);
      }
      else
      {
        midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 20, 0};
        MidiUSB.sendMIDI(event);
      }
    }
  }

  lastSwitchSQUAREState  = readingSwitchSQUARE;


  muxPin = 11;
  selectMuxPin(muxPin); // Select one at a time
  int readingSliderSUBOSC = analogRead(zInput); // and read Z
  midiCCValue = (readingSliderSUBOSC / 8);
  if (readingSliderSUBOSC > (sliderSUBOSCState + 4)  or readingSliderSUBOSC < (sliderSUBOSCState - 4))
  {
    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 21, midiCCValue};
    MidiUSB.sendMIDI(event);
    sliderSUBOSCState = readingSliderSUBOSC;
  }


  muxPin = 12;
  selectMuxPin(muxPin); 
  int readingSliderPW = analogRead(zInput); 
  midiCCValue = (readingSliderPW / 8);
  if (readingSliderPW > (sliderPWState + 4)  or readingSliderPW < (sliderPWState - 4))
  {
    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 22, midiCCValue};
    MidiUSB.sendMIDI(event);
    sliderPWState = readingSliderPW;
  }


  muxPin = 13;
  selectMuxPin(muxPin); 
  int readingSwitchPW = analogRead(zInput);

  if (abs (readingSwitchPW - lastSwitchPWState) > 160)
  {
    lastDebounceTimeSwitchPW = millis();
  }
  if ((millis() - lastDebounceTimeSwitchPW) > debounceDelay) 
  {
    if (abs (readingSwitchPW - switchPWState) > 160)

    { switchPWState = readingSwitchPW;

      midiCCValue = (readingSwitchPW / 8);

      midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 23, midiCCValue};
      MidiUSB.sendMIDI(event);
    }
  }

  lastSwitchPWState = readingSwitchPW;








  muxPin = 14;
  selectMuxPin(muxPin); 
  int readingSliderLFO = analogRead(zInput); 
  midiCCValue = (readingSliderLFO / 8);
  if (readingSliderLFO > (sliderLFOState + 4)  or readingSliderLFO < (sliderLFOState - 4))
  {
    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 24, midiCCValue};
    MidiUSB.sendMIDI(event);
    sliderLFOState = readingSliderLFO;
  }


  muxPin = 15;
  selectMuxPin(muxPin); 
  int readingSwitchLFOWAVE = analogRead(zInput);
  midiCCValue = (readingSwitchLFOWAVE / 8);
  if (abs (readingSwitchLFOWAVE - lastSwitchLFOWAVEState) > 80)
  {
    lastDebounceTimeSwitchLFOWAVE = millis(); 
  }
  if ((millis() - lastDebounceTimeSwitchLFOWAVE) > debounceDelay) 
  {
    if (abs (readingSwitchLFOWAVE - switchLFOWAVEState) > 80)


    {
      midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 25, midiCCValue};
      MidiUSB.sendMIDI(event);
      switchLFOWAVEState = readingSwitchLFOWAVE;
    }
  }

  lastSwitchLFOWAVEState = readingSwitchLFOWAVE ;







  byte mux2Pin = 0;
  selectMux2Pin(mux2Pin);
  int readingSliderA = analogRead(z2Input); 
  midiCCValue = (readingSliderA / 8);
  if (readingSliderA > (sliderAState + 4)  or readingSliderA < (sliderAState - 4))
  {
    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 26, midiCCValue};
    MidiUSB.sendMIDI(event);
    sliderAState = readingSliderA;
  }

  mux2Pin = 1;
  selectMux2Pin(mux2Pin); 
  int readingSliderD = analogRead(z2Input); 
  midiCCValue = (readingSliderD / 8);
  if (readingSliderD > (sliderDState + 4)  or readingSliderD < (sliderDState - 4))
  {
    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 27, midiCCValue};
    MidiUSB.sendMIDI(event);
    sliderDState = readingSliderD;
  }


  mux2Pin = 2;
  selectMux2Pin(mux2Pin); 
  int readingSliderS = analogRead(z2Input); 
  midiCCValue = (readingSliderS / 8);
  if (readingSliderS > (sliderSState + 4)  or readingSliderS < (sliderSState - 4))
  {
    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 28, midiCCValue};
    MidiUSB.sendMIDI(event);
    sliderSState = readingSliderS;
  }



  mux2Pin = 3;
  selectMux2Pin(mux2Pin); 
  int readingSliderR = analogRead(z2Input); 
  midiCCValue = (readingSliderR / 8);
  if (readingSliderR > (sliderRState + 4)  or readingSliderR < (sliderRState - 4))
  {
    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 29, midiCCValue};
    MidiUSB.sendMIDI(event);
    sliderRState = readingSliderR;
  }


  mux2Pin = 4;
  selectMux2Pin(mux2Pin); 
  int readingSliderRATE = analogRead(z2Input); 
  midiCCValue = (readingSliderRATE / 8);
  if (readingSliderRATE > (sliderRATEState + 4)  or readingSliderRATE < (sliderRATEState - 4))
  {
    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 30, midiCCValue};
    MidiUSB.sendMIDI(event);
    sliderRATEState = readingSliderRATE;
  }



  mux2Pin = 5;
  selectMux2Pin(mux2Pin); 
  int readingSliderDELAY = analogRead(z2Input);
  midiCCValue = (readingSliderDELAY / 8);
  if (readingSliderDELAY > (sliderDELAYState + 4)  or readingSliderDELAY < (sliderDELAYState - 4))
  {
    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 31, midiCCValue};
    MidiUSB.sendMIDI(event);
    sliderDELAYState = readingSliderDELAY;
  }




  mux2Pin = 6;
  selectMux2Pin(mux2Pin); 
  int readingSwitchLFO = analogRead(zInput);
  midiCCValue = (readingSwitchLFO / 8);
  if (readingSwitchLFO > (lastSwitchLFOState + 160)  or readingSwitchLFO < (lastSwitchLFOState - 160))
  {
    lastDebounceTimeSwitchLFO = millis();
  }
  if ((millis() - lastDebounceTimeSwitchLFO) > debounceDelay) 
  {
    if (readingSwitchLFO > (switchLFOState + 160)  or readingSwitchLFO < (switchLFOState - 160))

    { switchLFOState = readingSwitchLFO;


      midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 32, midiCCValue};
      MidiUSB.sendMIDI(event);

    }
  }

  lastSwitchLFOState = readingSwitchLFO;








  mux2Pin = 7;
  selectMux2Pin(mux2Pin);
  int readingSwitchEFFECT = analogRead(z2Input);
  midiCCValue = (readingSwitchEFFECT / 8) ;
  if (readingSwitchEFFECT > (lastSwitchEFFECTState + 160)  or readingSwitchEFFECT < (lastSwitchEFFECTState - 160))
  {
    lastDebounceTimeSwitchEFFECT = millis();
  }
  if ((millis() - lastDebounceTimeSwitchEFFECT) > debounceDelay) 
  {

    if (readingSwitchEFFECT > (switchEFFECTState + 160)  or readingSwitchEFFECT < (switchEFFECTState - 160))

    { switchEFFECTState = readingSwitchEFFECT;

      midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 33, midiCCValue};
      MidiUSB.sendMIDI(event);
    }
  }

  lastSwitchEFFECTState = readingSwitchEFFECT;



  mux2Pin = 8;
  selectMux2Pin(mux2Pin); 
  int readingSliderVELVOLUME = analogRead(z2Input); 
  midiCCValue = (readingSliderVELVOLUME / 8);
  if (readingSliderVELVOLUME > (sliderVELVOLUMEState + 4)  or readingSliderVELVOLUME < (sliderVELVOLUMEState - 4))
  {
    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 34, midiCCValue};
    MidiUSB.sendMIDI(event);
    sliderVELVOLUMEState = readingSliderVELVOLUME;
  }



  mux2Pin = 11;
  selectMux2Pin(mux2Pin); 
  int readingSwitchPORTAMENTO = analogRead(zInput);
  midiCCValue = (readingSwitchPORTAMENTO / 8);

  if (abs (readingSwitchPORTAMENTO - lastSwitchPORTAMENTOState) > 160)
  {
    lastDebounceTimeSwitchPORTAMENTO = millis();
  }
  if ((millis() - lastDebounceTimeSwitchPORTAMENTO) > debounceDelay) 
  {
    if (abs (readingSwitchPORTAMENTO - switchPORTAMENTOState) > 160)

    { switchPORTAMENTOState = readingSwitchPORTAMENTO;



      midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 35, midiCCValue};
      MidiUSB.sendMIDI(event);
    }
  }

  lastSwitchPORTAMENTOState = readingSwitchPORTAMENTO;



  mux2Pin = 12;
  selectMux2Pin(mux2Pin); 
  int readingSliderPORTAMENTOTIME = analogRead(z2Input); 
  midiCCValue = (readingSliderPORTAMENTOTIME / 8);
  if (readingSliderPORTAMENTOTIME > (sliderPORTAMENTOTIMEState + 4)  or readingSliderPORTAMENTOTIME < (sliderPORTAMENTOTIMEState - 4))
  {
    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 36, midiCCValue};
    MidiUSB.sendMIDI(event);
    sliderPORTAMENTOTIMEState = readingSliderPORTAMENTOTIME;
  }


  mux2Pin = 13;
  selectMux2Pin(mux2Pin); 
  int readingSliderPWDCO = analogRead(z2Input); 
  midiCCValue = (readingSliderPWDCO / 8);
  if (readingSliderPWDCO > (sliderPWDCOState + 4)  or readingSliderPWDCO < (sliderPWDCOState - 4))
  {
    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 37, midiCCValue};
    MidiUSB.sendMIDI(event);
    sliderPWDCOState = readingSliderPWDCO;
  }


  mux2Pin = 14;
  selectMux2Pin(mux2Pin);
  int readingSliderPWFILTER = analogRead(z2Input); 
  midiCCValue = (readingSliderPWFILTER / 8);
  if (readingSliderPWFILTER > (sliderPWFILTERState + 4)  or readingSliderPWFILTER < (sliderPWFILTERState - 4))
  {
    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 38, midiCCValue};
    MidiUSB.sendMIDI(event);
    sliderPWFILTERState = readingSliderPWFILTER;
  }


  mux2Pin = 15;
  selectMux2Pin(mux2Pin); 
  int readingSliderVELENV = analogRead(z2Input); 
  midiCCValue = (readingSliderVELENV / 8);
  if (readingSliderVELENV > (sliderVELENVState + 4)  or readingSliderVELENV < (sliderVELENVState - 4))
  {
    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 39, midiCCValue};
    MidiUSB.sendMIDI(event);
    sliderVELENVState = readingSliderVELENV;
  }




  int readingPotSPREAD = analogRead(potSPREAD);
  midiCCValue = (readingPotSPREAD / 8);
  if (readingPotSPREAD > (potSPREADState + 20)  or readingPotSPREAD < (potSPREADState - 20))
  {
    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 40, midiCCValue};
    MidiUSB.sendMIDI(event);
    potSPREADState = readingPotSPREAD;
  }





  int readingPotTIME = analogRead(potTIME);
  midiCCValue = (readingPotTIME / 8);
  if (readingPotTIME > (potTIMEState + 4)  or readingPotTIME < (potTIMEState - 4))
  {
    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 43, midiCCValue};
    MidiUSB.sendMIDI(event);
    potTIMEState = readingPotTIME;
  }



  int readingPotWET = analogRead(potWET);
  midiCCValue = (readingPotWET / 8);
  if (readingPotWET > (potWETState + 4)  or readingPotWET < (potWETState - 4))
  {
    midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 44, midiCCValue};
    MidiUSB.sendMIDI(event);
    potWETState = readingPotWET;
  }


  int readingSwitchCHORUSII = digitalRead(switchCHORUSII);    // read the state of the switch into a local variable:
  if (readingSwitchCHORUSII != lastSwitchCHORUSIIState) // if reading is different from last recorded state
  {
    lastDebounceTimeSwitchCHORUSII = millis();  // reset the debouncing timer
  }
  if ((millis() - lastDebounceTimeSwitchCHORUSII) > debounceDelay) // If more that 50 ms has passed since the reading was different from last recorder state...
  {
    if (readingSwitchCHORUSII != SwitchCHORUSIIState) //... and the reading still is different from the last recorded state...
    {
      SwitchCHORUSIIState = readingSwitchCHORUSII; // ...we believe it's genuine and update the buttonState...

      if (SwitchCHORUSIIState == LOW)
      {
        midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 45, 127};
        MidiUSB.sendMIDI(event);
      }
      else
      {
        midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 45, 0};
        MidiUSB.sendMIDI(event);
      }
    }
  }

  lastSwitchCHORUSIIState = readingSwitchCHORUSII;   


  int readingSwitchCHORUSI = digitalRead(switchCHORUSI);   
  if (readingSwitchCHORUSI != lastSwitchCHORUSIState) 
  {
    lastDebounceTimeSwitchCHORUSI = millis();  
  }
  if ((millis() - lastDebounceTimeSwitchCHORUSI) > debounceDelay) 
  {
    if (readingSwitchCHORUSI != SwitchCHORUSIState) 
    {
      SwitchCHORUSIState = readingSwitchCHORUSI;

      if (SwitchCHORUSIState == LOW)
      {
        midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 46, 127};
        MidiUSB.sendMIDI(event);
      }
      else
      {
        midiEventPacket_t event = {0x0B, 0xB0 | midiChannel, 46, 0};
        MidiUSB.sendMIDI(event);
      }
    }
  }

  lastSwitchCHORUSIState = readingSwitchCHORUSI;    // save the reading. Next time through the loop, it'll be the lastButtonState:



  MidiUSB.flush();

}



// The selectMuxPin function sets the S0, S1, and S2 pins
// accordingly, given a pin from 0-7.
void selectMuxPin(byte muxPin)
{
  for (int i = 0; i < 4; i++)
  {
    if (muxPin & (1 << i))
      digitalWrite(selectPins[i], HIGH);
    else
      digitalWrite(selectPins[i], LOW);
  }
}


void selectMux2Pin(byte mux2Pin)
{
  for (int i = 0; i < 4; i++)
  {
    if (mux2Pin & (1 << i))
      digitalWrite(select2Pins[i], HIGH);
    else
      digitalWrite(select2Pins[i], LOW);
  }
}

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