midi in problems

szebenyi

Hi, I want to visualize some music, coming in to processing from ableton. The idea is: I would like to make circles for each note received, using pitch for it's x value from the point of origin, and velocity for it's radius, then rotate the whole thing around to form a circle.

The whole thing works cool, but:

-somehow other circles start to appear for some reason that I don't want.

-it would be nice to avoid the delay as like this some notes are missed, but without it nothing appears.

-can't export pdf because of unknown exception. (image works) (???)

here is the code and image

thanks for your help!

import themidibus.*;
import processing.pdf.*;

boolean record=false;

MidiBus myBus; // The MidiBus

void setup() {
  size(800, 800);
  background(255);

  MidiBus.list();
  myBus = new MidiBus(this, 1, 0);

}
float x;
float y;
float t;
float time;

void draw() {
  if (record) {
    save("pic.tif");
    record = false;
  }
  t = millis()/10000.0f;
  delay(10);

}
void noteOn(int channel, int pitch, int velocity) {
  // Receive a noteOn
  float velo = map (velocity, 0, 127, 1, 20);
  translate(400, 400);
  rotate(t);
  translate(10,0);
  fill(255,0);
  ellipse(50+(pitch*3), 0, velo, velo);
  println(t);
}

void noteOff(int channel, int pitch, int velocity) {
  // Receive a noteOff
}

void controllerChange(int channel, int number, int value) {
  // Receive a controllerChange
}

void delay(int time) {
  int current = millis();
  while (millis () < current+time) Thread.yield();
}

void keyPressed() {
  if (key == 'q') {
    record=true;
  }
}

(

colouredmirrorball

Don't draw in the noteOn() method. Try to restructure your code so that it only draws in the draw() method somehow.

szebenyi

Thanks, now I've figured out it works nicely when I put it in pushmatrix/popmatrix