Prevent Youtube Audio Normalization with a Userscript.

Readme.md

Better alternative to this script

https://gist.github.com/abec2304/2782f4fc47f9d010dfaab00f25e69c8a. It is definitely way better than this one so I am using it as well.

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Auto Updating install link:

Install

Bookmarklet to use on demand

Get it from codepen

Bookmarklet was converted from the userscript using http://bookmarklets.org/maker/ (non minified).

Prevent Youtube Audio Normalization.user.js

// ==UserScript==
// @name         Prevent Youtube Audio Normalization
// @namespace    asdcawdcawcdkacja2333332
// @version      1.5
// @description  Prevent Youtube Audio Normalization
// @author       asdcawdcawcdkacja2333332
// @match        https://www.youtube.com/*
// @grant        none
// ==/UserScript==

//Background tabs are throttled so sometimes it takes a second to apply the value which is annoying as hell.
//Not sure if requestanimationframe is better than an interval for the above reason. requestanimationframe doesn't make the sound pop on volume change though.

//https://webapps.stackexchange.com/questions/90995/how-can-i-change-a-youtube-videos-volume-beyond-the-normal-limits/103665#103665
//There should be a better way to do this using the "loudnessDb" and the "perceptualLoudnessDb" values within the video/player configs, but I have no idea how.

//Try both methods together
var theVideo, barVolume;

function repeatonFrame() {
    trytoFix();
    requestAnimationFrame(repeatonFrame);
}

function trytoFix() {
    try {
        theVideo = document.getElementsByTagName('video')[0];
        barVolume = document.getElementsByClassName("ytp-volume-panel")[0].attributes["aria-valuenow"].value / 100;
        if (theVideo.volume != barVolume) {
            console.log("Fixed the video volume from " + theVideo.volume + " to " + barVolume);
            theVideo.volume = barVolume;
        }
        //document.getElementsByTagName('video')[0].volume = document.getElementsByClassName("ytp-volume-panel")[0].attributes["aria-valuenow"].value / 100;
    } catch (e) {}
}

//SETINTERVAL METHOD
var TheInterval = setInterval(trytoFix, 100);

//REQUESTANIMATIONFRAME METHOD
requestAnimationFrame(repeatonFrame);

/*
//backup (useless)
document.getElementById("player-wrap").children[2].innerHTML.replace(/([lL])oudnessDb(.*?):(.*?)([,}])/g, "$1oudnessDb$2:0$4");
*/

Here's an alternative implementation: https://gist.github.com/abec2304/2782f4fc47f9d010dfaab00f25e69c8a

Here's an alternative implementation: https://gist.github.com/abec2304/2782f4fc47f9d010dfaab00f25e69c8a

Thanks for sharing!