nymea/libnymea/interfaces/volumecontroller.json

{
    "extends": "media",
    "actions": [
        {
            "name": "increaseVolume",
            "params": [
                {
                    "name": "step",
                    "type": "int"
                }
            ]
        },
        {
            "name": "decreaseVolume",
            "params": [
                {
                    "name": "step",
                    "type": "int"
                }
            ]
        },
        {
            "name": "setMute",
            "params": [
                {
                    "name": "mute",
                    "type": "bool"
                }

            ]
        }
    ]
}