Probably more of a niche use case but I believe there's a bug in Kontakt Player 8 (And possibly in Kontakt 8 as well) where the routing of audio isn't handled correctly with the handoff between Native Instruments and Windows/Elgato Wave Link.
The observed behavior is that Kontakt Player 8 (KP8) is defaulting to outputting only to the headphone of the Wave XLR Interface even though My Wave XLR and Windows have it set up to go to the Music Channel which is then sent to a different audio output.
I have tested this with Kontakt Player 8, Komplete Kontrol and Maschine 2.0 software and this is only happening in Kontakt Player 8.
KP8 Config:
Wave Link Config:
Windows Config:
Komplete Kontrol Audio Preferences that work correctly:
Maschine 2.0 Audio Output Preferences that also work correctly:
I am using Windows 10 and an Elgato Wave XLR as my interface for my microphone. The interface also has up to 9 different audio mixing channels.
Sorry for the direct call-out @Jeremy_NI but I am hoping this is something you can weigh in on with regards to it being a bug.