Avermedia Live Gamer Portable 1 Mac Manual Pdf

The title says it all. OBS acknowledges AverMedia LGP2+ and allows video input from it, but I have ZERO audio. I'm streaming from external sources, like my Switch and PS4; I don't stream using in-Mac sources (Twitch, etc).
No idea what I'm NOT doing or if I have to add an Audio Input or Output Capture element to my scene, but I've tried everything I can think of. I have a 2019 iMac with the (current) high-end processor.
Please assist. It's vitally important that people both watch AND HEAR me play Mario Kart for 20 minutes at a clip before I get bored and go on to doing something else. Thank you in advance.
(Alternately, my ElGato HD60 imports audio AND video but only within ElGato's Game Capture, which is sorely lacking in bells & whistles compared to the esteemed OBS.)

Avermedia Live Gamer Portable Instructions

Avermedia Live Gamer Portable Manual

Avermedia live gamer portable instructions

Avermedia Live Gamer Portable Lite

Constant Noise Live Gamer Portable 2 Plus, Mac OS & PS5. It's been told that the Elgato 4k Pro Mk2 and the Avermedia GC553 can fix this problem. They work like an EDID emulator. I'm using the GC553 but I can't get 120 Hz on my monitor (I use the Alienware AW2521HWL). I tried it with Borderlands 3. Avermedia C875 Live Gamer Portable Manuals & User Guides. User Manuals, Guides and Specifications for your Avermedia C875 Live Gamer Portable Video Gaming Accessories. Database contains 1 Avermedia C875 Live Gamer Portable Manuals (available for free online viewing or downloading in PDF): Manual.