nixpkgs/nixos/modules/services/desktops/pipewire/jack.conf.json

{
  "context.properties": {
    "log.level": 0
  },
  "context.spa-libs": {
    "support.*": "support/libspa-support"
  },
  "context.modules": [
    {
      "name": "libpipewire-module-rt",
      "args": {},
      "flags": [
        "ifexists",
        "nofail"
      ]
    },
    {
      "name": "libpipewire-module-protocol-native"
    },
    {
      "name": "libpipewire-module-client-node"
    },
    {
      "name": "libpipewire-module-metadata"
    }
  ],
  "jack.properties": {},
  "jack.rules": [
    {
      "matches": [
        {}
      ],
      "actions": {
        "update-props": {}
      }
    }
  ]
}