examples/media/vu_meter/meta/vu_meter.cmx

{
    "program": {
        "binary": "bin/app"
    },
    "sandbox": {
        "services": [
            "fuchsia.media.Audio",
            "fuchsia.sys.Environment",
            "fuchsia.sys.Launcher",
            "fuchsia.tracelink.Registry",
            "fuchsia.ui.policy.Presenter",
            "fuchsia.ui.scenic.Scenic"
        ]
    }
}