Transpose notes

Projects Programming
1

Hi, after turning a 49 keys vintage keyboard (6x9 matrix) into a MIDI controller using arduino UNO, i need to transpose all notes for Fl studio, when I play the first note C I can here it playing a C but on FL keys I saw it playing C♯, all notes same problem it shifted to another note . Is it a coding problem ? What can do to transpose the notes by a semi tone?

#include <Keypad.h> // load library "Keypad".
#include <MIDI.h>   // load library "MIDI Library".

MIDI_CREATE_DEFAULT_INSTANCE();

const byte ROWS = 6; //base 6 ROWS (Do,Fa#)(Do#,Sol)(Re,Sol#)(Re#,La)(Mi,La#)(Fa,Si)
const byte COLS = 9; //x 5 columns (Octave_1a)(Octave_1b)(Octave_2a)(Octave_2b)(Octave_3a)

byte keys[ROWS][COLS];

byte rowPins[ROWS] = {A0, A1, A2, A3, A4, A5}; //A0, A1, A2, A3, A4, A5
byte colPins[COLS] = {2, 3, 4, 5, 6, 7, 8, 9, 10,}; //One Pin for every 6 tones

byte pressed_key;

int note = 25;// initial note

Keypad kpd = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

String msg = "";

void setup() {
    MIDI.begin(); //start transmission Midi.
    Serial.begin(115200);

  //fill matrix of keys with note values
    for (int c=0; c<COLS; c++){
      for (int r=0; r<ROWS; r++){
        keys[r][c]=note;
        note++;
      }
    }   
}

void loop() {
  //search for pressed keys (up to 10 at the same time)
    if (kpd.getKeys())
    {
        for (int i=0; i<LIST_MAX; i++)   // The entire Matrix is ​​scanned.
        {
            if ( kpd.key[i].stateChanged )   // If a key changes state.
            {
                switch (kpd.key[i].kstate) {  // Pressed or Released
                    case PRESSED:
                    msg = " PRESSED.";
                    pressed_key=kpd.key[i].kchar;
                    MIDI.sendNoteOn(pressed_key, 80, 1);
                break;
                    case RELEASED:
                    msg = " RELEASED.";
                    pressed_key=kpd.key[i].kchar;
                    MIDI.sendNoteOff(pressed_key, 20, 1);
                }
            }
        }
    }
}  // End loop

Piano_Midi.ino (1.7 KB)

2

Code doesn't compile. You declare colPins as 9 long then try to put 11 values in it. Also note is not declared anywhere (should it be 'nota')?

Steve

3

if you just want to send a midi note which is a semitone lower than it is sending now thenMIDI.sendNoteOn(pressed_key - 1, 80, 1);would suffice, you might want to make sure you don't send a negative value though.

4

Deva_Rishi:
if you just want to send a midi note which is a semitone lower than it is sending now then

MIDI.sendNoteOn(pressed_key - 1, 80, 1);

would suffice, you might want to make sure you don't send a negative value though.

Oh Yes thanks a lot, I change the code like this and it works !! :wink:

                switch (kpd.key[i].kstate) {  // Pressed or Released
                    case PRESSED:
                    msg = " PRESSED.";
                    pressed_key=kpd.key[i].kchar;
                    MIDI.sendNoteOn(pressed_key +6, 80, 1);
                break;
                    case RELEASED:
                    msg = " RELEASED.";
                    pressed_key=kpd.key[i].kchar;
                    MIDI.sendNoteOff(pressed_key +6, 20, 1);
5

You have "int note = 25;// initial note" and count up from there. Is the lowest note of your keyboard C-Sharp in Octave 1? If not, you have the wrong starting value for 'note'. Perhaps you meant 24 (C in Octave 1).

6

This topic was automatically closed 120 days after the last reply. New replies are no longer allowed.