This is expected behaviour when DVS is running in ASIO mode. This is because ASIO purposely bypasses the Windows operating system to achieve lower latency.
If you’re using a professional audio application, such as Pro Tools, Logic or Reaper, you will be able to select DVS as the audio device within the applications audio settings.
If you’re using a Windows application, such as Windows Media Player, VLC or Microsoft Teams, ensure that DVS is running in WDM mode. DVS will present as a 16x16 channel (8 stereo pairs) soundcard under the Windows Sound settings.
You can change between ASIO and WDM whilst DVS is not running by selecting the Audio Interface dropdown box within the DVS Settings tab.