Default audio player needs css class applied to play button

It would be fantastic if the default audio player that appears when you paste an audio url into your player could have a css class applied to the play button. This would allow clicks on the play button to be tracked.

At present there is no way to identify clicks on the play button as they aren’t distinguishable from other kinds of clicks. I would like to be able to create a funnel in Google Analytics and use an audio play as the goal and this isn’t possible without some way to identify clicks on the play button and a css class would make this possible.