[Soundcloud oEmbed] oEmbed Auto-Resize doesn't work with Soundcloud

Dear all,

I’m trying to figure out why my Soundcloud oEmbeds won’t resize automatically, even though every other oEmbed (Youtube & Vimeo) works perfectly. I know, there are several workarounds to set a specific width to oEmbeds, like adding this to the function.php:

//Custom oEmbed Size
function wpb_oembed_defaults($embed_size) {
if(is_front_page()) {
$embed_size['width'] = 940;
$embed_size['height'] = 600;
}
else {
$embed_size['width'] = 600;
$embed_size['height'] = 338;
}
return $embed_size;
}
add_filter(‘embed_defaults’, ‘wpb_oembed_defaults’);

Or adding these attributes to the soundcloud link:
http://soundcloud.com/forss/flickermood?maxwidth=200&show_artwork=false

They both get the job done quite well, BUT: Assigning a set width to oEmbeds ruins the responsiveness of my design, e.g. when viewed on a tablet or smartphone, a 960px width player (that fits perfectly in the desktop edition) is just way too big for a smaller screen.

The weirdest of all is that setting a set width for oEmbeds in my theme’s function.php has absolutely no effect on YouTube and Vimeo oEmbeds: they fill the content area perfectly and automatically appear in just the right size and with the right width.

So, instead of setting a set width for oEmbeds, what other option do I have to make the oEmbedded Soundcloud player automatically resize and stay responsive?

My website: tastingtheweb.com

Thanks a lot for your help!

Kind regards,
tastingtheweb