How to set volume in minim?

cklkaren

Hello, I am trying to loop a song where when the audio input is at certain level, the volume of the song would be lowered; and when it is retrieved back to normal volume of audio input, the song will continue to play. What I am trying to do now is to mute and unmute the song, but it doesn't seem working...

import ddf.minim.*;

Minim       minim;
AudioInput  in;
AudioPlayer song;

void setup()
{
  size(512, 200);

  minim = new Minim(this);
  in = minim.getLineIn();
  song = minim.loadFile("song.mp3", 1024);
}

void draw()
{
  background(0);
  stroke(255);

  //draw sound line
  for(int i = 0; i < in.bufferSize() - 1; i++){
    line( i, height/7 + in.left.get(i)*height/7, 
          i+1, height/7 + in.left.get(i+1)*height/7 );
    line( i, height*6/7 + in.right.get(i)*height/7, 
          i+1, height*6/7 + in.right.get(i+1)*height/7 );
  }

  if (in.left.level()>0.5){
    song.mute();
  } else {   
    song.play();
  }

  println(in.left.level());
}

Within the if function, I have tried using boolean and song.pause(); and the same issue happened that the whole song would stop playing and wouldn't replay again. I also tried setVolume(); where it said volume is not supported. Hence, I came up with an idea to set the volume to mute and play. But it's still not working...

GoToLoop

Perhaps once an AudioPlayer use mute(), corresponding AudioInput won't get any more level()? :-??
Try out some keyPressed() or mousePressed() user intervention in order to play() it again! L-)

cklkaren

I have actually figured it out, the code works as followed:

import ddf.minim.*;
import ddf.minim.spi.*;
import ddf.minim.signals.*;
import ddf.minim.analysis.*;
import ddf.minim.ugens.*;
import ddf.minim.effects.*;

Minim       minim;
AudioInput  in;
AudioPlayer song;

void setup()
{
  size(512, 200);

  minim = new Minim(this);
  in = minim.getLineIn();
  song = minim.loadFile("song.mp3", 1024);
  song.loop();
}

void draw()
{
  background(0);
  stroke(255);

  //draw sound line
  for(int i = 0; i < in.bufferSize() - 1; i++){
    line( i, height/7 + in.left.get(i)*height/7, 
          i+1, height/7 + in.left.get(i+1)*height/7 );
    line( i, height*6/7 + in.right.get(i)*height/7, 
          i+1, height*6/7 + in.right.get(i+1)*height/7 );
  }


  if (in.left.level()>0.15){
    song.mute();
  } else if (in.left.level()<0.15){   
    song.unmute();
  }

  println(in.left.level()); 
}

GoToLoop

Oh, there's unmute() from Controller class too: :))

import javax.sound.sampled.BooleanControl;
public static BooleanControl.Type MUTE = BooleanControl.Type.MUTE;

public void mute() {
  setValue(MUTE, true);
}

public void unmute() {
  setValue(MUTE, false);
}

private void setValue(BooleanControl.Type type, boolean v) {
  if (hasControl(type)) ((BooleanControl) getControl(type)).setValue(v);
  else                  Minim.error(type.toString() + " is not supported.");
}

Anyways, here's a tweaked version of yours: B-)

// forum.processing.org/two/discussion/7237/how-to-set-volume-in-minim

import ddf.minim.Minim;
import ddf.minim.AudioInput;
import ddf.minim.AudioPlayer;

Minim       minim;
AudioInput  in;
AudioPlayer song;

float h$7, h6$7;

static final String FILE_NAME = "song.mp3";
static final short  AUDIO_BUFFER = 1024;
static final float  MUTE_THRESHOLD = .15, WEIGHT = 1.5;

void setup() {
  size(512, 200, JAVA2D);
  smooth(4);
  frameRate(60);

  stroke(-1);
  strokeWeight(WEIGHT);

  in = (minim = new Minim(this)).getLineIn();
  song = minim.loadFile(FILE_NAME, AUDIO_BUFFER);

  h$7 = height/7.0;
  h6$7 = 6.0/7.0 * height;
}

void draw() {
  background(0);

  int i = 0, len = in.bufferSize();
  float left = in.left.get(0), right = in.right.get(0);

  while (++i < len) {
    line(i-1, left*h$7 + h$7, i, (left = in.left.get(i))*h$7 + h$7);
    line(i-1, right*h$7 + h6$7, i, (right = in.right.get(i))*h$7 + h6$7);
  }

  float level = in.left.level();
  frame.setTitle(FILE_NAME + "'s intensity: " + level);

  if (level > MUTE_THRESHOLD)  song.mute();
  else                         song.unmute();
}