/**
 * A speaker that is turned up and down by steps and does not know its volume. It reports nothing: the capability
 * has no properties object in discovery.
 */
export declare const StepSpeaker: import("../types.js").InterfaceDescriptor<{}, {
    AdjustVolume: {
        name: string;
        payload: import("../schema.js").Schema<import("../schema.js").InferShape<{
            volumeSteps: import("../schema.js").Schema<number>;
        }>>;
        note: string;
    };
    SetMute: {
        name: string;
        payload: import("../schema.js").Schema<import("../schema.js").InferShape<{
            mute: import("../schema.js").Schema<boolean>;
        }>>;
    };
}, {}, false>;