This is brilliant, I'd just prefer to have the width of the player and song titles a bit less than the full width of the page, however if I do this and try it on the mobile width (on any platform, even dragging it to narrow on a PC) the controls for play/pause and the volume stop responding, I haven't set it to a specific width. The full width one in your version is fine so what am I missing? Sorry to appear rather dim on this!
Hilary