I am having issues reading the signals from the LiveInput signal array in Sonia.Every value in the array is 0. I am not sure what I am doing wrong. I cant find much documentation concerning the array.

import pitaru.sonia_v2_9.*;

Sample mySample;  

int fft_bands;
float[] fft_spectrum;

String signal_str = "";

boolean once = false;

void setup(){
 size(200, 200);  
 ellipseMode(CENTER);
 rectMode(CENTER);
 noStroke();
   
 fft_bands = 16;  
 fft_spectrum = new float[fft_bands];

 Sonia.start(this);
 LiveInput.start(fft_bands);
 mySample = new Sample("hello.wav");  
 mySample.play(); // play the sample once.  
 mySample.connectLiveInput(true);

 //LiveInput.useEqualizer(true);
 //LiveInput.useEnvelope(true,1.5);    
}

void draw(){
 background(255);
 if(mySample.isPlaying()){
   updateSignal();
 }
 else if(!mySample.isPlaying()){
   if(!once) {
     String[] signal_strs = split(signal_str, ",");
     saveStrings("signal.txt", signal_strs);
     once = true;
   }
 }
}

void updateSignal() {
 for(int i = 0; i < LiveInput.signal.length; i++){
   signal_str += LiveInput.signal[i]+", ";
 }
}


public void stop() {
 Sonia.stop();
 super.stop();
}