I want to build a midi controller with 24 10k pots and 24 digital buttons, I have tried several that didn't work, then I found these two examples. I have tested these codes and each work but they are for only 1 button and 1 pot. My question is, how can I expand each to 24 and then combine them into one sketch?


[CODE/*
This is an example of the "Analog" class of the MIDI_controller library.
Connect a potentiometer to analog pin A0. This will be the MIDI channel volume of channel 1.
Map it in your DAW or DJ software.

Written by Pieter P, 08-09-2017
https://github.com/tttapa/MIDI_controller
*/

#include <MIDI_Controller.h> // Include the library

// Create a new instance of the class 'Analog', called 'potentiometer', on pin A0,
// that sends MIDI messages with controller 7 (channel volume) on channel 1
Analog potentiometer(A0, MIDI_CC::Channel_Volume, 1);

void setup() {}

void loop() {
// Refresh the MIDI controller (check whether the potentiometer's input has changed since last time, if so, send the new value over MIDI)
MIDI_Controller.refresh();
}][/CODE]



Code:
/*
This is an example of the "Digital" class of the MIDI_controller library.
Connect a push buttons to digital pin 2. Connect the other pin of the button to the ground, 
a pull-up resistor is not necessary, because the internal one will be used. 
This button will play MIDI note C4 when pressed.
Map it in your DAW or DJ software.

Written by tttapa, 08/09/2017
https://github.com/tttapa/MIDI_controller
*/

#include <MIDI_Controller.h> // Include the library

const uint8_t velocity = 0b1111111; // Maximum velocity (0b1111111 = 0x7F = 127)
const uint8_t C4 = 60;              // Note number 60 is defined as middle C in the MIDI specification

// Create a new instance of the class 'Digital', called 'button', on pin 2, that sends MIDI messages with note 'C4' (60) on channel 1, with velocity 127
Digital button(2, C4, 1, velocity);

void setup() {}

void loop() {
  // Refresh the button (check whether the button's state has changed since last time, if so, send it over MIDI)
  MIDI_Controller.refresh();
}