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| Name |
FFT |
| Examples |
import processing.sound.*;
FFT fft;
AudioIn in;
int bands = 512;
float[] spectrum = new float[bands];
void setup() {
size(512, 360);
background(255);
// Create an Input stream which is routed into the Amplitude analyzer
fft = new FFT(this, bands);
in = new AudioIn(this, 0);
// start the Audio Input
in.start();
// patch the AudioIn
fft.input(in);
}
void draw() {
background(255);
fft.analyze(spectrum);
for(int i = 0; i < bands; i++){
// The result of the FFT is normalized
// draw the line for frequency band i scaling it up by 5 to get more amplitude.
line( i, height, i, height - spectrum[i]*height*5 );
}
}
|
|---|
| Description |
This is a Fast Fourier Transform (FFT) analyzer. It calculates the normalized power spectrum of an audio stream the moment it is queried with the analyze() method.
|
| Methods |
| analyze() |
Calculates the current frequency spectrum from the input source. |
| input() |
Define the audio input for the analyzer. |
|
|---|
| Constructor | FFT(parent)
FFT(parent, bands)
|
|---|
| Parameters |
| parent |
PApplet: typically use "this" |
| bands |
int: number of frequency bands for the FFT as an integer (default 512).
This parameter needs to be a power of 2 (e.g. 16, 32, 64, 128,
...). |
|
Updated on January 1, 2021 03:38:11am EST
