Reddit reviews Soundcraft EPM8 High-Performance 8-channel Audio Mixer

Wow, that's super interesting. I understand why you have the sound routed as you do and I didn't realize the limitations of the various recording softwares when combined with screen readers. I gotta say, that makes for an interesting challenge. Man...

Since you have a setup that works and all you really are looking for is to replace the mixer, I'd suggest something like this Yamaha MG10XU board. That one will set you back about $200, and while I don't have any personal experience with it, I like Yamaha stuff. Another I'd suggest, and this one may be even better for you, is the Soundcraft EPM8. Now, this is a little more expensive at $250, but this is a nice mixer, especially at the price point. I had one for a couple of weeks, but ultimately I didn't keep it because it's an analog mixer. Because you're recording directly to SD and don't need the USB connection back to the computer for data transmission, this may be a better choice. I recall it having a nice pre-amp as well.

If you're looking to spend less than either of those, I'd suggest instead of buying a new X, Y, or Z, look at used gear. While I like "new" stuff as much as the next person, often times in the music/audio world you can find quality used gear at good prices. My microphone you'd never know I bought used, and I saved $100 versus buying new.

For a last couple of other options, maybe an Allen & Heath ZED-10 or a Peavey mixer, though I'm having trouble finding a specific one I think might work for you. Just the same, Peavey makes good stuff.

Good luck.

Yeah, you could get a mixer (like this): Soundcraft Mixer - Unpowered, 8 + 2 channels (EPM8) https://www.amazon.com/dp/B003TSEFKG/ref=cm_sw_r_cp_api_i_Py5hDbSZAG4X7

However, it’s not ideal because your mix becomes permanent