OK, that’s too bad.
I am waiting for a response from DPS Support. With the uncertain times I am trying to be patient and not press Support for an answer. Of course, they may not have a solution yet. I tried reinstalling DPS from fresh installation media found at http://www.bongiovidps.com/download but it didn’t solve the problem.
Another community forum said: “…If it (DPS) makes use of core audio, there is a possibility that core audio crashes which would explain your loss of audio…” but I don’t know how to address that issue.