(apologies if this is off-topic for this forum - I looked around and this seemed the most appropriate!)
I have an audio interface / mixer (Zoom Livetrak L-8) with support for 2 independent stereo output channels from the connected computer (1-2 and 3-4). Its driver makes available both an ASIO and standard interface (not sure which exactly it supports but some of MME, WASAPI - the normal ones), and both can be used at once. However, given Windows' lack of (good) multi-channel audio support, the exposed non-ASIO interface goes to the first output channel (1-2).
What I would like to do is to be able to route some programs through the second output channel (3-4). This option is exposed in the ASIO device, but of course that is not accessible by most programs. So what I am looking for is something somewhat like virtual cable in how it exposes a standard audio device, but with ASIO-aware routing that can send incoming audio to specific ASIO channels. Does this exist, or is this use case just too niche?
p.s. Virtual cable isn't the best analogue, as I don't need its main feature of the virtual microphone - it's just the only program I know that exposes that sort of a virtual device.