The embedded audio player in normal posts is great. But does anybody know how I can make it a bit.... sexier?

I'd like to play with it. Customise it.

For example, maybe change the colour pallete, or make it a bit longer in length, or add an extra context menu ("download source file") for example? :)

I believe this is actually the browser that embeds it, rather than ourselves. We just essentially tell the browser that its media, and its type.

There have been resources in the past, at least for v4 that allowed you to customise this type of thing but that comes without using the default browser's player.