nixpkgs/nixos/modules/services/desktops/pipewire/alsa-monitor.conf.json

{
  "properties": {},
  "rules": [
    {
      "actions": {
        "update-props": {
          "api": {
            "acp": {
              "auto-port": false,
              "auto-profile": false
            },
            "alsa": {
              "use-acp": true
            }
          }
        }
      },
      "matches": [
        {
          "device": {
            "name": "~alsa_card.*"
          }
        }
      ]
    },
    {
      "actions": {
        "update-props": {
          "node": {
            "pause-on-idle": false
          }
        }
      },
      "matches": [
        {
          "node": {
            "name": "~alsa_input.*"
          }
        },
        {
          "node": {
            "name": "~alsa_output.*"
          }
        }
      ]
    }
  ]
}