I totally understand the use-case. I have thought about adding that for a while and I would likely use it in my own music production workflow just as I used SPAN. However, implementing that system-wide would be quite a large undertaking on both macOS and Windows. I'm sure I could get a minimum viable product on macOS done in a reasonable amount of time since Apple seems to support something like that in macOS 14.2 and later, but tools like eqMac and SoundSource exist and are battle-tested to be low latency and performant. I may dive into that one day, but am avoiding the feature creep as I approach finalizing the v1.0 update. Implementing it with the server plug-in is trivial and already "done" for v1.0.