Testing using audio inputs and mapping that to a color.

minim_input_test

import ddf.minim.*;
import ddf.minim.analysis.*;
  
float myOpacity;
float getVolume;

int mappedVolume;

Minim minim;
AudioInput in;
 
void setup(){
 smooth();
 size(800, 400);
 background(255); 
 
 minim = new Minim(this);
 in = minim.getLineIn(Minim.MONO,255);
 
 
}
 
void draw(){
 
  background(0);
  stroke(255);
  
  // draw the waveforms so we can see what we are monitoring
  for(int i = 0; i < in.bufferSize() - 1; i++)
  {
    float value=in.left.get(i);
    
    //Map the volume which ranges from 0-2 to a hex color value which ranges from 0 - 16777215
    mappedVolume = int(map(value,0,255,10000,16777215));
    
    //Get Red
    float r = mappedVolume >> 16 & 0xFF;
    
    //Get Green
    float g = mappedVolume >> 8 & 0xFF;
    
    //Get Blue
    float b = mappedVolume & 0xFF;
    
    //Set the fill color
    fill(r,g,b);
    
    //Set the stroke of the ellipse to black.
    stroke(0);
    
    //Draw the ellipse
    ellipse(56, 46, 55, 55);
        
    
    stroke(#FF0000);
    line( i, 250 + in.left.get(i)*50, i+1, 250 + in.left.get(i+1)*50 );
  }
  
  //Reset fill color
  fill(255);
  String monitoringState = in.isMonitoring() ? "enabled" : "disabled";
  text( "Input monitoring is currently " + monitoringState + ".", 5, 15 );
 
}


void keyPressed()
{
  if ( key == 'm' || key == 'M' )
  {
    if ( in.isMonitoring() )
    {
      in.disableMonitoring();
    }
    else
    {
      in.enableMonitoring();
    }
  }
}