[mkishi]

Interesting, that's very close. :)

Since I had a bunch of software open and the system had been online forever, I restarted and tested again — turns out it squeezed a couple of ms to ~16ms on shared-mode.

By the way, I believe the low latency stack is enabled system-wide, so Reaper should already be using it.

For what it's worth, on my game I've been piping a SunVox instance to a 128-samples shared-mode WASAPI stream and haven't encountered distorted audio, yet.

At the end of the day, I guess I would indeed default to recommending WASAPI unless one has hardware with great ASIO drivers.