ETA 9/5/14: Squarespace updated their audio player! They added a design tab in the widget so that you can set your preference between Classic and Minimal (default). The following tutorial will work if your preference is set to Classic. See an example of the new SS audio player here.
There may be a simpler way to customize the Squarespace audio player, like a nice GUI with buttons and sliders to edit stylesheet values, but if there is, I'm totally unaware of it! If you're using SS's audio player for your podcast series or weekly musical feature, you might want to customize the audio player to make it consistent with your brand or website color palette. You can customize it easily enough by editing the CSS property values for the following selectors --- it's a great place to start. Just copy and paste the CSS to your stylesheet, edit the property values and then save. That's pretty much it!Read More