Sound on loading page problem

Hi
I¹ve managed to get a sound file to play when a page loads but in the
browser it keeps showing the controls.

I need it to be playing in the background and not to be controlled by the
user. By default the parameter uses the HIDDEN=true command which should
work but doesn¹t.

Does anyone know what I¹m doing wrong here.
I did post this yesterday but it got lost in bigger stuff.

Thanks