In reply to @Minijackson:matrix.org
I found that you can run pavucontrol, and in the configuration tab you can set your device profile to "Pro Audio"

In reply to @Minijackson:matrix.org
not the most PipeWirey thing to do, but it works!

In reply to @fractivore:cyberia.club
Probably a few different ways to debug it... Sorry for the late reply. Have you looked at it with qpwgraph or a visual tool like that?

In reply to @technicus:matrix.org
Thanks, I am a total noob.

New to NixOS, New to Emacs, New to Vim, new to live music coding, new to pipewire, new to I3 . . . I am learning everything all at once.

In reply to @technicus:matrix.org
How do I use this:

https://github.com/NixOS/nixpkgs/blob/nixos-unstable/nixos/modules/services/audio/jack.nix

Based on what you've said, I'm not entirely sure if you're asking how to use JACK in general or if you're specifically wondering how to use it within NixOS.

To answer the former, there are a wide variety of ways to use JACK. It's kind of an audio routing and syncing swiss army knife. PipeWire was sort of built to replace it, and is a little easier to use, but I've found I still have to use JACK for some edge cases where they haven't worked out the bugs in PipeWire yet.

Most people control JACK with the GUI program qjackctrl, but you can also use it from the command line with jack_control, for example, if you want to write scripts.

As for the latter, how to use JACK on NixOS, check out the options search page: https://search.nixos.org/options?channel=23.11&show=services.jack.jackd.enable&from=0&size=50&sort=relevance&type=packages&query=jack

You can use those options to enable and configure JACK. For example I have:

let 
  jackOn = false; 
  studioConfig = false;
in 
{
  sound.enable = true;
  security.rtkit.enable = true;
...
I have other stuff here that I redacted to save space cuz it's irrelevant to the question.
...
  #Enable jack separately, this configuration may need work
  services.jack = {
    jackd.enable = jackOn;
    jackd.extraOptions = if studioConfig then [ "-dalsa" "--device" "hw:STUDIOCAPTURE,0" ] else [ "-dalsa" "--device" "hw:Generic_1,0" ];
  };
}

In reply to @technicus:matrix.org
How do I use this:

https://github.com/NixOS/nixpkgs/blob/nixos-unstable/nixos/modules/services/audio/jack.nix