Adjusting the size of the player

How do you adjust the size of the player? The height would change but not the width.

[ca_audio url=”http://dynamitemagicandballoons.com/wp-content/uploads/2013/01/One-That-I-Want.mp3″ width=”500″ height=”15″ css_class=”codeart-google-mp3-player]
I tried width = 27 and height = 100 but there was still a black box.
the height = 15 gets rid of the black box but I tried several values for the width and the lower value the black box came back. I tried the width value at 10 an it gives ne this huge black box above the player.
How can I get the player to be half the width that it is now. It goes across the entire page.
Thanks

http://wordpress.org/extend/plugins/google-mp3-audio-player/