Nice level isn't being set

[nonetrix]

I have the following config which should give me nice level -15

{inputs, ...}: {
  imports = [
    inputs.nix-gaming.nixosModules.pipewireLowLatency
  ];
  security.rtkit.enable = true;
  services.pipewire = {
    enable = true;
    lowLatency.enable = true;
    pulse.enable = true;
    alsa = {
      enable = true;
      support32Bit = true;
    };
  };
}

However running ps -eo pid,comm,nice | grep pipe I get the following

   2466 pipewire        -11
   2478 pipewire-pulse  -11

As you can see it doesn't set to lower than -11, I have been trying to fix my audio crackling issues by setting a lower one to no avail. As a last ditch effort I tried importing this just in case I was doing something wrong, but it still isn't working. This is likely user error or a nix bug or perhaps old configs that might be lingering as I tried to get low latency audio a while back. Right now I am just trying to get the crackle to go away, but since it's happening with this too I guess it wouldn't be a sin to ask here. I am 80% of the way with getting rid of the crackle, but in extreme cases like maxing out Doom Eternal in a place with a lot of monsters the audio will crackle

[fufexan]

Looking at the upstream pipewire.conf.in, niceness and rt priority levels can be changed from the PipeWire config.

[nonetrix]

That's what I did and the nix module I imported does I think?

[NotAShelf]

The low latency module as of now is broken after the PW update. I mean to refactor it later.

Here is a hands-on approach if you want to try it yourself. You will need to tweak the settings to suit your setup.