New user, Win 10 up to date. Everything working right after installation; it sounds good. Tried WDM, followed instructions (Set WDM in General, set JRiver MC in Sound|Playback as default, set Realtek Digital Output (WASAPI) as Audio Device). Now no sound whether WDM is on or off (on and off several times w/appropriate setup changes).
Sound output is from USB to DAC/amp/speakers on desktop.
Available audio devices in MC are: Default (Direct Sound), my Dell monitor, Default Audio Device (WASAPI), Headphones (not using), JRiver Media Center (WASAPI), Realtek Digital Output(WASAPI), More (Direct Sound to above, disk writer, and Null). I think I've tried all but those under the "More" with no sound from any of them.
Also ran any Win troubleshooters I could find, and multiple reboots just to be sure. Even uninstalled and reinstalled MC to see if that would help. It didn't, I'm stuck.