cache songs played via http with play()

[JkWhoSaysNi]

I have an intro song which is played via play() as players come online.

The problem is, every time a player comes on it re-downloads the mp3 file from my webhost (eating my bandwidth unnecessarily).

There should be a way to have graal cache the songs played using play() with a URL so they can be listened to again without using extra bandwidth (for both the player and the web server).