[emms-help] adding a playable filetype

[Steven Arntson]

An elementary question, but I am nonetheless stumped.

I have some .aif files in my collection that emms doesn't know how to
play. Some of my default players (mplayer, vlc) can play these, but the
filetype isn't currently included in the .el file for those players.

Thank you! I've been using Emms for about a year, and it's worked great.
steven