Find volume of mic input using minim lib in Processing

Question

I'm trying to get the volume level from my mic to adjust the size of a box (louder = bigger). But I have the following issues: a) getGain seems to be giving me -64 constantly b) getVolume doesnt seem to be available

I edited a Processing example to respond to the mic rather than the audio file provided but could not figure out how to get the volume

Here is what I have

import ddf.minim.analysis.*;
import ddf.minim.*;

Minim       minim;
AudioInput  accessMic;
FFT         fft;
float boxSize;

void setup () {
  size(512, 200, P3D);
  minim = new Minim(this);
  accessMic = minim.getLineIn();
  rectMode(CENTER);

}

void draw() {
  background(255);
  boxSize = accessMic.getGain();
  stroke(255);
  println(boxSize);
  fill(0);
  rect(width/2,height/2,boxSize,boxSize);
}

Any help you can give me would be greatly appreciated Thanks

Answer 1

I had similar problem with .getGain(); in minim
I got around to something similar by using left.level(); which returns float between 0 and 1. And obviously that only take into account one of the stereo input, you can totally also do .right.level(); for result from another channel there.

so your code could lookin kinda like
boxSize = accessMic.left.level() * 100;
and you'll get box with a size bouncing between 0 and 100!

hope that helps!