I am working on a project to get a string of lights to flash to music when the bass hits primarily. I have the hardware pretty much set, but I am using minim's audio in function to create an fft and look at the low frequencies and display the intensity as brightness to leds. But as play songs, I am getting a noticeable delay between a bass hit and the flash of the led.

Does anyone have any ideas where I could optimize the code? I'm thinking it might be something like fft sample rate, or maybe the line in buffer.

Thanks

1. 
   import ddf.minim.*;
   import ddf.minim.signals.*;
   import ddf.minim.analysis.*;
   import ddf.minim.effects.*;
   import processing.serial.*;
   import cc.arduino.*;
   
   Arduino arduino;
   Minim minim;
   AudioInput song;
   FFT fft;
   
     int xmax = 600; //window width
     int ymax = 300;//window height
   
   void setup()
   {
     size(xmax, ymax);
     minim = new Minim(this);
    
     //line in code
     song = minim.getLineIn(Minim.STEREO, 1024);
     arduino = new Arduino(this, Arduino.list()[0], 57600);
    
     //create graph
     fft = new FFT(song.bufferSize(), 48000);
   }
   
   void draw()
   {
     background(0);
     fft.forward(song.mix);
     stroke(127, 255, 0, 200); //I set the color of my lines
     for(int i = 10; i < fft.specSize(); i++){
       line(i, height-30, i, height - (30+fft.getFreq(i*10)));
       // I create lines that represent the amplitude
       // of each frequency.
       text("Min Freq", 10, height-10);
       text("Max Freq", fft.specSize(), height-10);
     }
     ledcontrol(); //I call the function for the arduino
   }
   
   void ledcontrol(){
     //h is the intensity cutoff
     int h =90;
    
     //if the bass is below h, the lights are on low
     //peaks above the cutoff will display normally
     if(int(fft.getFreq(30))< h){
       arduino.analogWrite (11, 10);
       }
       else{
     arduino.analogWrite(11, int(fft.getFreq(30)));
     println(fft.getFreq(30));
       }
   
      
     }