Can American DJ possibly add Audio Triggering and Fade Time to this software. Even if it was an add-on ... I would pay a few bucks for it.

You'll find software based solutions often leave out things we may be accustomed to.

Fade time is already implemented. You program your fade into the scene. Are you looking for a "global" fade slider? Sorry, it ain't in there. Would require a lot of new coding to add that in there. Not as easy as you might thing it would be. Why? Because you have programmable fade times.

This is what I do to get around those:
I may make a scene, then copy it and adjust the fade times depending on what I need. Right now, I have the "snap to" and 2-second fade variants. For me, that's sufficient. I do have a "blackout" that fades over 10 seconds to all ZERO values.

Chase to Audio is not quite as easy, as it requires more complicated programming and most likely a new tab for building chases. But with scenes having multiple steps, do we chase to steps or chase to scenes? What if scenes change too fast? Of course, it's up to the operator to determine what should be chosen for a chase sequence.

If audio triggering were to be added, it's not going tobe a modular add-on, it would have to be integrated into the software, and would require a new release.