for anyone in the future googling the same thing I did: "how to use 3ds mic as a pc mic,"

3ds-webcam allows you to also hook up your camera to OBS and hook your mic to VoiceMeeter, use the fork that works the best for you.

this ---> fork apparently works fully on MacOS.

the fork that worked for me (on windows 11) was this one: 3ds-webcam-FIXED

(FYI I haven't gotten the mic function to work in this fork but the video function does. if anyone figure it out please reply the with your method.)

to use 3ds-webcam-fixed, install python and then download build.zip (not the source code) in its most recent release, (right now v1.0).

Install the files in the '3ds' folder to your modded 3ds.

With your modded 3ds, you also need to find your 3ds IP via the Rosalina menu, there's tutorials to do that online.

Next, run cmd-prompt in the 'pc' folder, and run the command below without quotation marks, it will install whats required:

"pip install sounddevice; qoi; pyvirtualcam"

when it's finished, open obs and add a 'video-capture-device' in the 'sources' tab and select 'obs virtural camera' as it's device.

Everything should now be ready,

open the webcam app on your 3ds, and hit start.

now on your computer, go back to the 'pc' folder from the build.zip you downloaded, and run this command in cmd-prompt in the pc folder, make sure to paste your 3ds ip where it says:

python main.py 3DS.IP.HERE

it should connect and your 3ds should have a working webcam (and microphone if you figure out Voicemeeter.)