I just did the newest Win10 Update and I'm experiencing some peculiar problems using DirectSound and WaveOut in Reaper. ASIO works as normal. As shown in the video, it's related to the way Windows now handles microphone access. Until this point I have always had "Allow apps to access your microphone" set to off without problem.
Anyway, in the video I have mic access on and Reaper picks up the AudioBox's input as normal. Turning off mic access results in the AudioBox's output appearing at the input and feeding back.
https://youtu.be/eDUxC4OSJFA
AFAIK this problem did not exist before the update and these Reddit posts suggest that is true.
https://www.reddit.com/r/Reaper/comm...or_record_any/
https://www.reddit.com/r/Reaper/comm...onger_working/