It seems to me that SoundCloud is loading also a Flash using
<embed name="sm2movie" id="sm2movie" src="/player/assets/swf-a0e10171/soundmanager2_flash9.swf" quality="high" allowscriptaccess="always" bgcolor="#ffffff" pluginspage="www.macromedia.com/go/getflashplayer" title="JS/Flash audio component (SoundManager 2)" type="application/x-shockwave-flash" wmode="transparent" haspriority="true">
You should try to embed direclty the Flash using a CEWP or via a JS file loaded by the CEWP, as such (all the extra are simply DIVs)
<OBJECT classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,40,0"
WIDTH="550" HEIGHT="400" id="myMovieName">
<PARAM NAME=movie VALUE="myFlashMovie.swf">
<PARAM NAME=quality VALUE=high>
<PARAM NAME=bgcolor VALUE=#FFFFFF>
<EMBED src="/support/flash/ts/documents/myFlashMovie.swf" quality=high bgcolor=#FFFFFF WIDTH="550" HEIGHT="400"
NAME="myMovieName" ALIGN="" TYPE="application/x-shockwave-flash"
PLUGINSPAGE="http://www.macromedia.com/go/getflashplayer">
</EMBED>
</OBJECT>