<svg xmlns="http://www.w3.org/2000/svg"> <foreignObject x="0" y="0" width="100px" height="100px"> <!-- lime background --> <div xmlns="http://www.w3.org/1999/xhtml" style="background:lime; width:100%; height:100%;"> <!-- Use an unrecognized media type, so that if we're honoring plugins, the "download plugin" placeholder will be shown. --> <embed xmlns="http://www.w3.org/1999/xhtml" src="data:audio/hahaThisIsntReallyAFormat," width="100px" height="50px"/> <!-- Also try a possibly-recognized media format, for completeness. --> <embed xmlns="http://www.w3.org/1999/xhtml" src="data:audio/wav," width="100px" height="50px"/> </div> </foreignObject> </svg>