API PlaySoundFile

Plays the specified audio file once. Unlike PlayMusic, you cannot stop the playback. PlaySoundFile("path"[, "channel"])

Arguments

 * path : String – The path and name of the sound file you'd like to play, relative to the WoW directory; both ogg and mp3 formats are accepted. The file must exist prior to logging in to WoW.
 * channel : String. Either "Master" (this will play the sound also with disabled sounds like before 4.0.1), "SFX", "Ambience", "Music".

Examples
You can play a sound file included with your addon: PlaySoundFile("Interface\\AddOns\\MyAddOn\\mysound.ogg", "Master") Or one of the ones shipped with WoW (Power of the Horde, in this case): PlaySoundFile("Sound\\Music\\ZoneMusic\\DMF_L70ETC01.mp3", "Master")