I've recently bought a new guitar amp, which features a usb-interface for recording purposes. Through this interface, you can record both the clean as well as the processed tone at the same time (by using the left or right channel, respectively). A lot of amps have this feature but most use two interfaces instead.

For a DAW, this isn't a problem and is easily handled. For any other software (including Windows itself, apparently) having only one interface creates a whole bunch of problems. For example, I'd like to send the processed tone, in stereo, to my default output (i.e my headphones) while I use the clean tone for, say, the game Rocksmith 2014. Nope, can't do that. You either get both channels at the same time (which isn't all that useful, obviously) or you can set the device to single-channel, get your stereo sound (from the wrong, clean channel, mind you) and you can't use the other channel at all. Apps like voicemeter banana kind of work - I can set the balance to 100% left/right while setting the output to mono and monitor the device that way - but using them kills all other audio and thus, once again, defeats the purpose.

This is ridiculously easy to do on a mac. Install Soundflower/Loopback, set things up and in about 5 minutes, you're done.

I've spent the past four evenings looking for a windows-solution and I've yet to make progress.

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Any ideas? Thanks.