I haven't tried this on Windows yet, as I'm on Linux, but try VB-Audio Matrix if you need ASIO support.
You can create a Virtual Windows Audio Output with up to 8 channels of audio, and route them individually to your ASIO ports. It's also free to use, but recommend buying a license if you use it professionally. You can also route audio from stereo to mono for Foxy's use case.
It probably won't work for LaJoyeuseLucieHolle but it should work for FoxyTejada 's use case.