modified-exponential-volume.js

(function() {
    'use strict';

    const {get, set} = Object.getOwnPropertyDescriptor(HTMLMediaElement.prototype, 'volume');
    Object.defineProperty(HTMLMediaElement.prototype, 'volume', {
        get () {
            const volume = get.call(this);
            const newVolume = Math.pow(volume, 1./3.);
            console.log('manipulated volume from', volume, 'to  ', newVolume, 'on', this);
            return newVolume;
        },
        set (volume) {
            // same as https://github.com/pulseaudio/pulseaudio/blob/19adddee31ca34bf4e0db95df01b4ec595f2d267/src/pulse/volume.c#L265-L275
            // https://www.robotplanet.dk/audio/audio_gui_design/
            const player = document.getElementById('movie_player');
            if (player) {
                volume = player.getVolume() * 0.01;
            }
            const newVolume = volume*volume*volume;
            console.log('manipulated volume to  ', newVolume, ' from', volume, 'on', this);
            return set.call(this, newVolume);
        }
    });
})();