minim audio question for art istallation

Core Library Questions

gat123

minim audio question for art istallation

in Core Library Questions • 2 years ago

hi to everyone!

I'm a beginner in processing and I need a sketch that simply change background from white to black when microphone detect a sound.

So when microphone detect a sound, processing draw a black rect that have same high and width of canvas.

I think that I've to use minim audio, I found on web this code, but I need something different. Thanks a lot

import ddf.minim.*;

Minim minim;

AudioInput in;

void setup()

{ size(512, 200, P3D);

minim = new Minim(this);

minim.debugOn();

// get a line in from Minim, default bit depth is 16

in = minim.getLineIn(Minim.STEREO, 512); }

void draw() { background(0); stroke(255); // draw the waveforms

for(int i = 0; i < in.bufferSize() - 1; i++) {

line(i, 50 + in.left.get(i)*50, i+1, 50 + in.left.get(i+1)*50);

line(i, 150 + in.right.get(i)*50, i+1, 150 + in.right.get(i+1)*50);

}

void stop() {

// always close Minim audio classes when you are done with them

in.close(); minim.stop();

super.stop();

}

Replies(1)

Jesse Sco..

Re: minim audio question for art istallation

2 years ago

I would recommend to use in.mix.level() as this will give you the amplitude... so your code could look like this...

import ddf.minim.*;
Minim minim;
AudioInput in;
float threshold = 0.1;
void setup() {
size(512, 200, P3D);
minim = new Minim(this);
minim.debugOn();
in = minim.getLineIn(Minim.STEREO, 512);
}
void draw() {
if(in.mix.level() < threshold) {
background(0);
}
else if(in.mix.level() >= threshold) {
background(255);
}
println(in.mix.level());
}
void stop() {
in.close(); minim.stop();
super.stop();
}

note that you can easily make the threshold float variable adjustable, with a controlP5 slider, or by a keyPressed etc, if you need to adjust the threshold in realtime...

~ J

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