p5.js | waveform() Function

The waveform() function is an inbuilt function in p5.js library. This function is used to return the amplitude values, which will be the snapshot of amplitude readings in a single buffer. This can be used to draw the waveform of a sound.


waveform(bins, precision)

Note: All the sound-related functions only work when the sound library is included in the head section of the index.html file.

Parameter: This function accepts two parameters as mentioned above and described below:

  • bins: This parameter is used hold an integer that will be reprenseted like 2n. The range is 16 to 1024, the default value is 1024 and it is optional parameter.
  • precision: This parameter is used to return Float32 Array which is more precise than a regular array if the previous parameter holding any value. It is also a optional.

Below example illustrates the p5.waveform() function in JavaScript:





var sound; 
var wvfrm;
function preload() { 
    // Initialize sound 
    sound = loadSound("pfivesound.mp3"); 
function setup() { 
    // Playing the preloaded sound 
    // will return no of frames
    wvfrm = sound.waveform();


Online editor: https://editor.p5js.org/
Environment Setup: https://www.geeksforgeeks.org/p5-js-soundfile-object-installation-and-methods/

Supported Browsers: The browsers supported by p5.js waveform() function are listed below:

  • Google Chrome
  • Internet Explorer
  • Firefox
  • Safari
  • Opera


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