What are all the file extensions for audio files?

So far I have...
mp3,mp2,ogg,wav,mpc,flac,ape,aac,mp4,aif,aiff,au,la.

Are there any that I am missing?

Thanks for the help!
(this is for a php script i am working on)

heh there are many. It depends on if you want to support mod decoding or not. Also there are quite a few older proprietary formats that most people don't use. What is the aim of your php script?

The script is just a auto directory index.
The extensions are used to display a different icon for each filetype.

.vqf
.mid
.mod
.wma
.voc

Don't forget,

mp+, .mpp, Older versions of .mpc
.bonk, Bonk audio
.ofr, OptimFrog lossless
.shn, Shorten lossless
.lqt, Liquid Audio
.mpga, "mpeg audio"
.ra, Real Audio
.pac, LPAC lossless
.wv, Wavpack lossless,

and there are more. You might want to browse the "media types" lists under "Options / Preferences" (or equivalent options boxes) in several media players, if you are interested in picking up as many as possible; but I think you have the important formats.

If you're at it :

.mka : Matroska audio

rmjb : Real VBR
omg : Sony crypted Atrac3
mp1
spc : Nintendo

Or simply look to Winamp Setup / File types : the list is really impressive.

Hahahaha.... OMG!!!

and more accurately, SPC : SNES (Super Nintendo Entertainment System) sound format.