MidiBus noob :P

[stone whale]

Hi! I'm trying to get a head start at school for a big assignment, but I'm struggling to use my MIDI keyboard's input just to draw a circle.

import themidibus.*;

MidiBus myBus;

void setup() {
  size(400, 400);
  background(255);
  noStroke();

  //MidiBus.list(); //Input 1 Output 4
  myBus = new MidiBus(this, 1, 4);
}

void draw() {
}

void controllerChange(int channel, int number, int value) {
  println("ch: "+channel+" #: "+number+" v: "+value);

  if (number==74) {
    fill(255, 255, 0);
    ellipse(100, 100, 100, 100);
  }

  //#1 Modifier Wheel
  //#74-77 Knob 1-4
}

This is the code, does anyone see why I just see the white background and no ellipse when I move the knob?
Tried doing something with changing its color and size first but the ellipse didn't even draw :C
Thanks for helping in advance 🙂

[grim kite]

Hi, what controller are you using? Also, I noticed that your draw() method is empty. That's probably why you're not seeing anything. Try keeping a global variable for the size of the ellipse and change it during the control change event. Then draw it inside draw(), but don't forget to clear the screen using background() first

[grim kite]

Hi, are you still interested in this? I'd like to help. If it's worth mentioning, I've also used Java's native MIDI API if this doesn't work out

[stone whale]

Sorry bout that, school 😅

Yea so I kinda figured it out but I wonder if theres another way to do it, ill send the code once I get home

Also curious about the native MIDI API, what are the diffirences?

[grim kite]

TheMidiBus is a wrapper for Java's built-in MIDI interface. It makes it more beginner friendly, but at the cost of not entirely understanding how it works.