I've seen many places saying it's possible to play an audio file using the expression editor to locate it. I'm working with an array database and thus need to use the expression editor to find it (e.g. [generated number like 002] + ".ogg"). Either I am being totally stupid and somehow missed it, or it isn't possible. I looked and looked. Sorry for my impatience. I have work for a client to complete by next week and I can't do so without this audio playback which is reliant on the array.