Increase WhatsApp Web Audio Volume

whatsapp-increase-volume.user.js

// ==UserScript==
// @name         Increase WhatsApp Web Audio Volume
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Intercept audio creation and redirect to Web Audio API with increased volume using createMediaElementSource
// @author       ChatGPT
// @match        https://web.whatsapp.com/*
// @run-at       document-start
// ==/UserScript==

(function() {
    // Store original Audio constructor
    const originalAudio = window.Audio;

    // Create a new AudioContext
    const audioContext = new (window.AudioContext || window.webkitAudioContext)();

    // Create an AudioContext GainNode to control volume
    const gainNode = audioContext.createGain();
    gainNode.gain.value = 2; // Increase volume by 2 (200%)

    // Intercept calls to new Audio()
    window.Audio = function(src) {
        // Create a new Audio element (HTMLAudioElement)
        const audioElement = new originalAudio(src);

        // Create a MediaElementSourceNode from the audio element
        const source = audioContext.createMediaElementSource(audioElement);

        // Connect the source to the GainNode, and then to the AudioContext destination
        source.connect(gainNode);
        gainNode.connect(audioContext.destination);

        // Return the modified audio element
        return audioElement;
    };

})();