I'm trying to have it so when you press "play" on the DVD it plays a clip of audio before playing the film. Is this possible? I am not finding anything in the manual right now.
You should be able to add a short clip to the End Action for your button -- and an End Action link from that clip to your main video -- so that this short clip plays between the button and the main video.
if I got you right you're looking for some kind of "click" sound as soon as a button is pressed, right? Well, there's no easy way on DVDs, I'm afraid. In all cases you've got to produce a video (!) with the click sound or whatever in it. The video may consist of a black background only of course. That clip could be called in the way as Steve suggested but you could as well add it to the beginning of your video before rendering for DVD (with the advantage of seemless playback).
Sounds to me that what is needed is menu page "Outro" action. You can define an intro sequence for a menu, why not an "Outro" sequence, for instance with a Click and fadeout. As far as I can tell you have to put this on every button, and I have yet been able to do it.
I've done it often in DVDAuthor, where you program your entire DVD by hand in XML, and it's relatively easy there. Set a variable, call the outro, and have to outro use the variable in it's jump table after having played the sequence.
In DVDArchitect; Not so easy, from what I've tried so far, then again, I haven't tries as hard as I probably should, yet.
I have solved my own problem, and maybe came across one possible, if not very elegant, solution to Evans.
I distilled a few things into a 'DVD Test' that may be of use, it has:
Start up video
Menu fade-in and out
Inter-menu cross fade
Audio on button click (Click is on the menu fade-out)
Run-Once video on first title play.