Hey Steve, thanks for the reply.

I do in fact have the correct drivers for the Digi002R.  Digidesign makes a standalone driver available for third-party audio apps, and that's the one I have loaded.

Upon further investigation, I found some of the problem was due to pilot error (oh, what a surprise, right?).  I've been a user of Audition since the days of CEP 1.0, up thru CEP 2.1, then to Aud 1 and 1.5.  When I recently switched to Aud 3.0, I had a brain-freeze and forgot to check where the monitoring function had been moved to, since other stuff has been shuffled around.

That said...

In Edit View, under Options, the Record Monitor (F10 shortcut) function was moved under Metering.  In Multitrack View, under Options, Monitoring is right there plain as day (doh!), with suboptions for either External or Audition Mix>>> Always Input or Smart Input.

I find, however, that in Edit View, with Record Monitor enabled, the signal can indeed be monitored via the meter movement, *but* there is no audio signal present at the output.  In Multitrack View, it works just fine, albeit with slight latency.  (Pro Tools has a workaround - the "Low Latency" option - which allows direct monitoring of the signal "in the box" on outputs 1/2 without the round trip to the computer, but of course in third-party apps this is not available.)

So.... with correct drivers loaded and the pilot error solved, I'm very curious as to why monitoring works in Multitrack View but not in Edit View.  It's not a deal breaker - one can always just record in Multitrack View and jump back to Edit View as needed - but it would be nice to get this little bugaboo figured out.  It may well be an idiosyncrosy in using the Digi002R unit with Aud 3.  Really a great-sounding interface, in any case (I see online that there are many fans of the 002).