It can be .wav or .wa2, whichever you want. Make sure the sound file is less then 32kb. In the macroes area, select the sound file in the F11 or F12 slot When in game, press SHIFT + F11 / SHIFT + F12 to send the file to a certain player. Make sure you ticked the player first. Please note: Some zones do not allow you to send bong sounds to other players. Hope this helps.