MP3 not supported?

[Darryl L. Pierce]

Okay, relative newbie question:

Why does Fedora default to HelixPlayer for MP3s and then throw up the 
message "The player does not have the capabilities to play back this 
content"? Why doesn't Fedora install MP3 (and MPEG-4) support by 
default, and how do I install these so that my default player for both 
types (HelixPlayer and Totem) will actually play MP3 and MPEG files?

-- 
Darryl L. Pierce <mcpierce at gmail.com>
Homepage: http://mcpierce.multiply.com/
"Bury me next to my wife. Nothing too fancy, though..." - Ulysses S. Grant