Transpose on bank with scanned matrix button

[dem23-tech]

Hello,

I am quite lost with the following topic:

I have built a keyboard with some buttons to select choices. All key from the keyboard and selection buttons are scanned in a matrix noteButtonMatrix.

I would like to add some features as transpose or MIDI channel change by using those buttons, but I am not able to find the right way to do it, as IncrementDecrement classes and similars use real pins to trigger actions.

After several searches and reading lot of documentation I am not able to find a solution (I am not expert in C++...)

I attach my code in case someone could help..

// Include the library

#include <Control_Surface.h>

// Instantiate a MIDI Interface to use

USBMIDI_Interface midi;

CD74HC4051 mux = {
  A0,                // analog pin
  {15, 14, 16},      // Address pins S0, S1, S2, S3
  //NO_PIN, // Optionally, specify the enable pin  CD74HC4067
};


bool RythmStatus[4]={0};                              //Status pulsado / no pulsado de teclas de Ritmo

Bank <4> bank;

const AddressMatrix<9, 6> addressesnote = {{
  {00, 00, 00, 00, 00, 53},
  {54, 55, 56, 57, 58, 59},
  {60, 61, 62, 63, 64, 65},
  {66, 67, 68, 69, 70, 71},
  {72, 73, 74, 75, 76, 77},
  {78, 79, 80, 81, 82, 83},
  {84, 85, 86, 87, 88, 89},
  {90, 91, 92, 93, 94, 95},
  {96, 00, 00, 00, 00, 40},
}};

const AddressMatrix<9, 2> addressesbutton = {{  // I separate the buttonmatrix from the notes matrix
  {-10, 40},
  {-10, 40},
  {-10, -10},
  {-10, -10},
  {-10, 00},
  {-10, 00},
  {00, 00},
  {00, 00},
  {40, 00},
}};

CCButtonMatrix<9,2> buttonmatrix = {
  {4, 3, 2, 10, 9, 8, 6, 5, 7}, // row pins
  {mux.pin(6), mux.pin(7)},
  addressesbutton,  
  Channel_1,   // column pins
};

Bankable::NoteButtonMatrix<9, 6> notematrix = {
  {bank,BankType::ChangeChannel },
  {4, 3, 2, 10, 9, 8, 6, 5, 7},    // row pins
  {mux.pin(0), mux.pin(1), mux.pin(5), mux.pin(2), mux.pin(3), mux.pin(4)}, //,mux.pin(6),mux.pin(7)}, // column pins >> add pull-up 10k  
  addressesnote,    // address matrix
  Channel_1,    // channel and cable number
};



// Initialize the Control Surface

void setup() {
  Serial.begin(115200);
  Control_Surface.begin();
  delay(1000);
  Control_Surface.sendProgramChange({0,Channel_1});
}

// Update the Control Surface

void loop() {
  
  Control_Surface.loop();


// Teclas de ritmo. rock y swing cambian banco (channel)

  if(!buttonmatrix.getPrevState(1,0)!=RythmStatus[0]) {
    if(!RythmStatus[0]) {bank.select(2);  Serial.println(bank.getSelection());}  // bank.select() does not work, but I do not know why!!
    RythmStatus[0]=!RythmStatus[0];
    }
  
  if(!buttonmatrix.getPrevState(1,1)!=RythmStatus[1]) {
    if(!RythmStatus[1]) {bank.select(3);  Serial.println(bank.getSelection());}
    RythmStatus[1]=!RythmStatus[1];
    
    }