const h = 512;

let fft, mic, osc, playing;

​

function setup() {

  createCanvas(w, h);

  pixelDensity(1);

​

  // Initialize microphone

  mic = new p5.AudioIn();

  mic.start();

​

  // Initialize FFT (Fast Fourier Transform) for audio analysis

  fft = new p5.FFT();

  fft.setInput(mic);

​

  // Initialize the oscillator for test tone

  osc = new p5.Oscillator();

  osc.setType('sine'); // You can change this to 'triangle', 'sawtooth', 'square'

  osc.freq(440); // Frequency in Hz, 440 Hz is the standard A note

  osc.amp(0); // Start with amplitude at 0

  playing = false;

}

​

function draw() {

  background(255);

​

  // Microphone stuff

  let spectrum = fft.analyze();

  strokeWeight(3);

  beginShape();

  let loudFrequencies = []; // Array to store loud frequencies

  for (let i = 0; i < spectrum.length; i++) {

    let amplitude = spectrum[i];

    let f = constrain(amplitude, 0, 255);

    stroke(255 - f, f, 0);

    let x = map(i, 0, spectrum.length, 0, width);

    let y = map(f, 0, 255, height>>1, 0);

    point(x, y);

​

    // Check if the frequency is loud

    let threshold = 100; // Set a threshold for loudness, can be adjusted

    if (amplitude > threshold) {

      // Map frequency index to actual frequency

      let freq = map(i, 0, spectrum.length, 0, 22050); // Assuming a max frequency of 22050 Hz

      loudFrequencies.push(freq);

    }

  }

  endShape();

​

  // Print loud frequencies to console

  if (loudFrequencies.length > 0) {

    console.log('Loud Frequencies: ', loudFrequencies.join(', '));

  }

}

​

​

function mousePressed() {

  if (!playing) {

    osc.start();

    osc.amp(0.5, 0.05); // Gradually increase the amplitude to 0.5 over 0.05 seconds

    playing = true;

​

    // Set a timeout to stop the oscillator after 500ms

    setTimeout(() => {

      osc.amp(0, 0.05); // Gradually decrease the amplitude to 0 over 0.05 seconds

      osc.stop(0.05); // Stop the oscillator after 0.05 seconds

      playing = false;

    }, 500); // 500ms = 0.5 seconds

  }

}

​