WPaudio – underline links on hover?

Anybody know how to get the links to underline on hover?
Adding text-decoration: underline; to the following line in the wpaudio.min.js file works, but loses the play button:
'.wpaudio-container a:hover':{color:_wpaudio.style.link_hover_color}
For example:
'.wpaudio-container a:hover':{text-decoration: underline; color:_wpaudio.style.link_hover_color}