by Ricky Rellum.
I've managed to enlarge the buttons:
in: "moodle/lib/javascript-static.js" search for "controls.height="
I have changed it to 25 (controls.height=25)
Then, go to "moodle/filter/mediaplugin/styles.css" and change ".mediaplugin.mediaplugin_mp3 object { height:15px; }" to something larger (I used 30px
Good luck!
