Minim; how to use the sound frequency information to transform it into colors? (Processing Beginner)

Core Library Questions

agustinpe..

Minim; how to use the sound frequency information to transform it into colors? (Processing Beginner)

in Core Library Questions • 1 year ago

Hello!

I'm trying to convert audio frequency into light frequency:
low sound frequency to low lighting frequency (Blue)
mid sound frequency to mid lighting frequency (Green)
high sound frequency to high lighting frequency (Red)

The void draw() that I want to make is very simple, because it is in concept, just "1 pixel" (rect(0,0,width, height), changing color with the size of the hole screen:

void setup(){
size(screen.width, screen.height);
background(0);
}

The thing is that i want to use a microphone Input to do the convertion of frequencies in real time... it is possible???
Anybody knows how can i do it into reality??

I've search at the examples library but all i found there is to transform frequency into waves... and it is not what i want...

At the hole project is to upload the finish process into an open and beta website; with the information of tutorials (how to install and simple use processing for this aplication, for people who doesn't know anything of programming... also in english and my mother language: spanish). But now... step by step...

Thanks!

Agustín

Replies(2)

tfguy44

Re: Minim; how to use the sound frequency information to transform it into colors? (Processing Beginner)

1 year ago

Most sketches show frequencies as waves because waves are easy to understand.

But a wave is really just a set of values at different frequencies! The wave is created by looking at those values!
So all you need to do is use the values to determine a color instead!

Here, I started working on it for you (you may need to put in your own sample song!):

import ddf.minim.*;
AudioPlayer player;
Minim minim;
void setup(){
size(1024, 200, P2D);
minim = new Minim(this);
player = minim.loadFile("Game of Thrones.mp3", 2048);
player.play();
player.loop();
}
void draw(){
background(0);
stroke(255);
line(0,100,width,100);
int count = 0;
int lowTot = 0;
int medTot = 0;
int hiiTot = 0;
for (int i = 0; i < player.left.size()/3.0; i+=5){
lowTot+= (abs(player.left.get(i)) * 50 );
count++;
}
fill( map( lowTot, 0, count * 50, 0, 255 ), 0, 0);
noStroke();
rect(0,0,20,20);
stroke(255);
for (int i = 0; i < player.left.size()-1; i+=5)
{
// line(i, 50 + player.left.get(i)*50, i+1, 50 + player.left.get(i+1)*50);
// line(i, 150 + player.right.get(i)*50, i+1, 150 + player.right.get(i+1)*50);
point( 2*i, 100 + player.left.get(i)*50 );
}
}
void stop(){
player.close();
minim.stop();
super.stop();
}

agustinpe..

Re: Re: Minim; how to use the sound frequency information to transform it into colors? (Processing Beginner)

1 year ago

Hello tfguy44:

I've been working on your sketch... thanks a lot!!!

I haven't found the way to know exactly wich frequency information is for high, mid and low separtly, but the result anyway is very interesting.

import ddf.minim.*;
AudioPlayer tema;
Minim minim;
float x = 0;
int y = 0;
float b = 0;
String texto;
PFont titulo;
int y1;

void setup() {
size(800, 500, P2D);
background(b);
minim = new Minim(this);
tema = minim.loadFile("post arctic industries.mp3", 256);
tema.play();
tema.loop();
titulo = loadFont("ArialMT-32.vlw");
textFont(titulo, 16);
textAlign(LEFT);
texto = "post arctic industries - vector lovers";
//frameRate(12);
}

void draw() {
int count = 0;
int lowTot = 0;
int midTot = 0;
int highTot = 0;
for (int i = 0; i < tema.left.size()/3.0; i+=5) {
    lowTot+= (abs(tema.left.get(i))*30 );
    midTot+= (abs(tema.left.get(i))*20 );
    highTot+= (abs(tema.left.get(i))*10 );
    count++;
}
fill(map(highTot, 0, count*10, 0, 255),0,0);
rect(x, y, width, height);
x = x + width;
if(x >3*width){
   x = 0;
}
fill(0, map(midTot, 0, count*10, 0, 255), 0);
rect(x, y, width, height);
x += width;
if(x >3*width){
   x = 0;
}
fill(0, 0, map(lowTot, 0, count*10, 0, 255));
rect(x, y, width, height);
x += width;
if(x >3*width){
   x = 0;
}
//this part of animation doesn't work and i don't understand why? I want that text moves away
// n = 0;
y1 = height-5;
fill(255);
text(texto, 5, y1);
y1++;
// n++;
// if(n > 10){
// fill(255,0);
// }
}

void stop() {
tema.close();
minim.stop();
super.stop();
}

Top Reply