Thanks for your reply.
I use MC15.0.95
My OS is Windows 7. I use a dedicated laptop with no other purpose than to play music. I recently did a clean install of Windows 7. And I read this article:
http://www.computeraudiophile.com/content/Windows-7-Audio-JRiver-Media-Center-14-Configurationand adjusted my settings accordingly: Exclusive mode, with both boxed checked.
I read the article you pointed me to. It is clear and helpful, but does not solve the issue: I already intended to use either ASIO or WASAPI output mode.
I have ASIO4ALLV2 installed. Before I bought this V-DAC, my audio supplier let me use the Ayre QB9 DAC. A great machine, but unforunately a bit too expensive for me now... It worked with the same laptop set up, using ASIO as output mode. The sample frequency showed correctly on the DAC dislplay (until 96K, because that's as far as the DAC goes...).
But now with this V-DAC ASIO and WASAPI do not work anymore.
Also I have problems with "Output format" under DSP Studio: I check the box, but see no options for setting bit depths etc. that I have been raeding about. Any further help would be highly appreciated