import { Param } from "../context/Param";
import { GainFactor, Unit, UnitName } from "../type/Units";
import { ToneAudioNode, ToneAudioNodeOptions } from "./ToneAudioNode";
interface GainOptions extends ToneAudioNodeOptions {
    gain: number;
    units: UnitName;
    convert: boolean;
}
/**
 * A thin wrapper around the Native Web Audio GainNode.
 * The GainNode is a basic building block of the Web Audio
 * API and is useful for routing audio and adjusting gains.
 * @category Core
 */
export declare class Gain<Type extends Unit = GainFactor> extends ToneAudioNode<GainOptions> {
    readonly name: string;
    /**
     * The gain parameter of the gain node.
     */
    readonly gain: Param<Type>;
    /**
     * The wrapped GainNode.
     */
    private _gainNode;
    readonly input: GainNode;
    readonly output: GainNode;
    /**
     * @param  gain The initial gain of the GainNode
     * @param units The units of the gain parameter.
     */
    constructor(gain?: GainFactor, units?: Unit);
    constructor(options?: Partial<GainOptions>);
    static getDefaults(): GainOptions;
    /**
     * Clean up.
     */
    dispose(): this;
}
export {};