Send once [Uno + Sparkfun MIDI Breakout]

Projects General Guidance
9

I re-read the Bounce documentation which allowed me a more comprehensive understanding of what that library can do for me, and I think that I have found a more elegant way to program this sketch by using Bounce to tidy up some redundancies in my sketch.

That said, I am still frequently recording more than one MIDI message per button contact. I am going to try to some different buttons when I can get some later in the week, but if there is any further wisdom on this problem it would be much appreciated!

I have tried bounce values as small as 5 ms and as great as 1000 ms with this code:
Also, further to a comment from Nick Gammon earlier in this thread, the buttons are on pull-down, not pull-up. (Is pull-up better and why?)

#include <MIDI.h>
#include <Bounce.h>

// set the pins:
const int buttonStop = 2; 
const int buttonGo = 3;
const int buttonLast = 4;
const int buttonNext = 5;   

// debounce the pushbuttons at 500 milliseconds:
Bounce bounceStop = Bounce(buttonStop, 5); 
Bounce bounceGo = Bounce(buttonGo, 5); 
Bounce bounceLast = Bounce(buttonLast, 5); 
Bounce bounceNext = Bounce(buttonNext, 5); 

void setup() {
  
  MIDI.begin();   
    	
  // initialize the pushbutton pin as an input:
  pinMode(buttonStop, INPUT);  
  pinMode(buttonGo, INPUT);
  pinMode(buttonLast, INPUT);
  pinMode(buttonNext, INPUT);  
}

void loop(){

// check to see if the state of the buttons has changed. if a button has been pushed, send a MIDI message:
    if (bounceStop.update() && bounceStop.read() == HIGH) {   
     MIDI.sendNoteOn(1,127,5);
     Bounce bounceStop = Bounce(buttonStop, 100); 
  } 
  
    if (bounceGo.update() && bounceGo.read() == HIGH) {       
       MIDI.sendNoteOn(2,127,5);
       Bounce bounceGo = Bounce(buttonGo, 100); 
    }
  
    if (bounceLast.update() && (bounceLast.read() == HIGH)) {       
       MIDI.sendNoteOn(3,127,5);  
       Bounce bounceLast = Bounce(buttonLast, 100);
    } 
  
    if (bounceNext.update() && bounceNext.read() == HIGH) {       
       MIDI.sendNoteOn(4,127,5);
       Bounce bounceNext = Bounce(buttonNext, 100);
    }
 
}

I am immensely grateful for your help and guidance.