soundmap.pde

/*
 * Copyright 2011, Manuel Zapata
 */

// Import the sonia lib
import pitaru.sonia_v2_9.*;

// Vector to store the glow of each point
int[] glow;

void setup() {
  // Set up a nice long screen
  size(700,130);

  // Start the sonia engine
  Sonia.start(this);

  // Start the microphone  
  LiveInput.start(); 

  // Initialize the glow vector and set it to zero
  glow = new int[1024];
  for (int i = 0; i < glow.length; i++) {
    glow[i] = 0;
  }

  noStroke();
  background(0,0,0);
}

void draw() {
  // Update the spectrum vector with the current data from the mic.
  LiveInput.getSpectrum();

  // Glow an ellipse for every spectrum position
  for ( int i = 0; i < LiveInput.spectrum.length; i++){ 
    // If the position is bigger than the threshold (80) glow
    if((int)LiveInput.spectrum[i] > 80) {
      glow[i] = (int)LiveInput.spectrum[i];
    }
    // Lose glow in time for every dot
    else {
      if (glow[i] > 1)
      glow[i] -= 2;
    }

    // Pich the color (brightness) from the glow vector
    fill(glow[i]);

    // Draw an ellipse for each position of the spectrum with the glow from the glow vector
    // The dots fill the screen from the bottom and the dots line is wrapped upwards
    ellipse((i*10+5)%width,height - (10 * (int)((i * 10 +5) / width)) -5, 5, 5); 
  } 
}

// Clean up
public void stop() {
  super.stop();
  Sonia.stop();
}