// Learning Processing
  // Daniel Shiffman
  // http://www.learningprocessing.com
  
  // Example 20-7: Sound events (double threshold) with Sonia
  
  // Import the Sonia library
  import pitaru.sonia_v2_9.*;
  
  float clapLevel = 0.5;  // How loud is a clap
  float threshold = 0.25; // How quiet is silence
  boolean clapping = false;
  
  void setup() {
    size(200,200);
    Sonia.start(this); // Start Sonia engine.
    LiveInput.start(); // Start listening to the microphone
    smooth();
    background(255);
  }
  
  void draw() {
  
    // Get the overall volume (between 0 and 1.0)
    float vol = LiveInput.getLevel();
  
    // If the volume is greater than 0.5, and we were not previously clapping, then we are clapping! 
    if (vol > clapLevel && !clapping) { 
      stroke(0);
      fill(0,100);
      rect(random(width),random(height),vol*20,vol*20);
      clapping = true; // We are now clapping!
    } else if (clapping && vol < threshold) { 
      // Otherwise, if we were just clapping and the volume level has gone down below 0.25, then we are no longer clapping!
      clapping = false;
    }
    
    // Graph the overall volume
    // First draw a background strip
    noStroke();
    fill(200);
    rect(0,0,20,height);
    
    // Then draw a rectangle size according to volume
    fill(100);
    rect(0,height-vol*height/2,20,vol*height/2);
    
    // Draw lines at the threshold levels
    stroke(0);
    line(0,height-clapLevel*height/2,19,height-clapLevel*height/2 );
    line(0,height-threshold*height/2,19,height-threshold*height/2 );
  }
  
  // Close the sound engine
  public void stop() {
    Sonia.stop();
    super.stop();
  }