After upgrading my system (better laptop, Windows 11, better DAC), I am still bothered by that nasty »Unable to change to Integer Mode« problem …
»Kernel-Streaming« is my default setting, and when starting Audirvāna, I almost always get that »Unable to change to Integer Mode« message. What I usually do then is switching to »WASAPI«, start playback any song, stop that, and switch back to »Kernel-Streaming«. Which works from that moment on without any problems, as long as that given Audirvāna listening session may last. What sense does that make?