/// <reference types="react" />
import * as Tone from 'tone';
export interface UseVuMeterProps {
    value: number | number[];
    onReady?: () => void;
    onError?: () => void;
}
/**
 * useVuMeter is a custom React hook that integrates with Tone.js to create a VU (Volume Unit) meter.
 * It can be used to monitor audio signal levels, supporting both mono and stereo inputs.
 *
 * @param {UseVuMeterProps} props - The configuration properties for the VU meter.
 * @param {number | number[]} props.value - The initial value(s) for the meter. Pass a single number for mono or an array of numbers for stereo.
 * @param {Function} props.onReady - Callback executed when the meter is ready.
 * @param {Function} props.onError - Callback executed in case of an error.
 *
 * @returns {object} An object containing various properties and methods for the VU meter:
 * - meter: The Tone.js Meter or Split instance, depending on the input type (mono or stereo).
 * - value: The current value(s) of the meter. It's a number for mono or an array of numbers for stereo.
 * - init: Method to initialize the VU meter.
 * - getValue: Method to retrieve the current value(s) from the meter.
 * - observe: Method to start observing and updating the meter's value(s).
 * - cancelObserve: Method to stop observing the meter's value(s).
 * - error: Boolean indicating if an error has occurred.
 * - errorMessage: The error message in case of an error.
 *
 * This hook can be particularly useful in audio applications where monitoring signal levels is necessary,
 * such as in mixing consoles, audio workstations, or other digital audio processing tools.
 */
export declare const useVuMeter: (props: UseVuMeterProps) => {
    meter: import("react").MutableRefObject<Tone.Split | null> | import("react").MutableRefObject<Tone.Meter | null>;
    value: number | number[];
    init: () => void;
    getValue: () => void;
    observe: () => void;
    cancelObserve: () => void;
    error: boolean;
    errorMessage: string;
};