How to modify a particular frequency in a sound file in p5.js?

@edmond_brakus 

To modify a particular frequency in a sound file in p5.js, you can use the p5.FFT (Fast Fourier Transform) object to analyze the frequency content of the sound file and then apply modifications to specific frequencies. Here's a basic example of how you can modify a particular frequency in a sound file in p5.js:

1. Load the sound file using the loadSound() function:

1
2
3
4

let sound;
function preload() {
  sound = loadSound('soundfile.mp3');
}

1. Create a p5.FFT object and set its properties (such as the number of bands and smoothing factor):

1
2
3
4
5
6

let fft;
function setup() {
  createCanvas(800, 600);
  fft = new p5.FFT();
  fft.setInput(sound);
}

1. Analyze the frequency content of the sound file using the analyze() function and modify the amplitude of a specific frequency bin:

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11

function draw() {
  let spectrum = fft.analyze();
  
  // Modify the amplitude of a specific frequency bin
  let index = 10; // the index of the frequency bin you want to modify
  let scaleFactor = 2; // the scaling factor to modify the amplitude
  spectrum[index] *= scaleFactor;
  
  // Display the modified sound file
  // (you can use the spectrum data to visualize the frequency content)
}

1. Play the modified sound file using the play() function:

1
2
3
4
5
6
7

function mousePressed() {
  if (sound.isPlaying()) {
    sound.stop();
  } else {
    sound.play();
  }
}

This is just a basic example to demonstrate how to modify a particular frequency in a sound file in p5.js. You can further customize and optimize the code based on your requirements.