[cheap_headphone]

A good list. I would definitely recommend Blackhole for Mac. It is easy to recompile and create multiple virtual devices. With the OS Aggregate Device feature, you can do some good complex setups.

Another one for Windows is ASIO Link Pro, which is quite old but still works well under Windows 10.

https://give.academy/downloads/2018/03/03/ODeusASIOLinkPro/

[strunz]

Alternatively if you have a simple DAC you can just route an output back to an input and record in any free DAW. It simplifies things so much.