You can, using 'display:none;' 'visibility:hidden;' or even 'opacity:0;' (first one do not reserv the place needed by element, while both others set element transparent, keeping the space used by the block), but you will not be able to autoplay audio in mobile device, as this require user action for start downloading music/video (to prevent unnecessary mobile date consumption ^^)
Give it in an ID in HTML and
try in JavaSdript: document.getElemenyById("YourIdHere")style.display = 'none'
or you can try using style = display:none as an attribute in HTML directly
