[p5.js 2.0 Bug Report]: FFT.setInput(mic) is not a function.

[Ayaan005-sudo]

Most appropriate sub-area of p5.js?

• Accessibility
• Color
• Core/Environment/Rendering
• Data
• DOM
• Events
• Image
• IO
• Math
• Typography
• Utilities
• WebGL
• Build process
• Unit testing
• Internationalization
• Friendly errors
• Other (specify if possible)

p5.js version

v2.1.2

Web browser and version

Chrome 120/Firefox 124

Operating system

Windows11

Steps to reproduce this

In v2,the function FFT.setInput(mic) no longer exists. This differs from v1 where the same code worked correctly. The error shows that the API has changed in p5.sound v2.

STEPS TO REPRODUCE :
let mic, fft, peakDetect;

function setup() {
createCanvas(400, 400);
userStartAudio(); // IMPORTANT for browser

mic = new p5.AudioIn();
mic.start();

fft = new p5.FFT();
fft.setInput(mic);

peakDetect = new p5.PeakDetect(20, 20000, 0.15, 20);
}

function draw() {
background(30);

fft.analyze();
peakDetect.update(fft);

if (peakDetect.isDetected) {
fill(0, 255, 0);
textSize(32);
text("PEAK!", 150, 200);
}
}

->Run this in p5.js v2.1.2 with p5.sound enabled

OBSERVED BEHAVIOR
->Console:TypeError: FFT.setInput is not a function.

EXPECTED BEHAVIOR
->In v1,fft.setInpt(mic) works
->In v2 it does'nt.

This is v2 result:

This is v1 result:

[welcome]

Welcome! 👋 Thanks for opening your first issue here! And to ensure the community is able to respond to your issue, please make sure to fill out the inputs in the issue forms.

For guidance on contributing, check out our contributing guidelines and other resources for contributors.
💬 If you have questions or need support, feel free to join the Processing Foundation Forum or visit our Community page.
📜 Please also review our Code of Conduct to understand our community standards.
Thank You!

[Dhananjay0719]

I can reproduce this issue in p5.js v2.x.
It appears that FFT.setInput() is missing compared to v1.x.
I’ll investigate and open a PR to restore or fix the behavior.

[Dhananjay0719]

I tested this on the current main branch using a local build with p5.sound.js.

fft.setInput appears to be defined and callable in this setup:

const fft = new p5.FFT();
console.log(fft.setInput);

This suggests the issue may depend on a specific usage pattern
(e.g. mic input, call order), or an older build/version.
Happy to help narrow down a minimal repro if needed.