Random tip... I noticed the volume sliders only take effect when you stop dragging the knob. You can use the 'oninput' event for the slider to set its value as

Random tip... I noticed the volume sliders only take effect when you stop dragging the knob. You can use the 'oninput' event for the slider to set its value as the user moves it around. Something like: volume_slider.oninput = function() { audio.volume = volume_slider.value; }