import type { OnDestroy } from '@angular/core';
import type { Observable } from 'rxjs';
import * as i0 from "@angular/core";
export declare class WebAudioDestination extends AnalyserNode implements OnDestroy {
    quiet: Observable<unknown>;
    constructor();
    protected static init(that: WebAudioDestination, node: AudioNode | null): void;
    ngOnDestroy(): void;
    private isSilent;
    static ɵfac: i0.ɵɵFactoryDeclaration<WebAudioDestination, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<WebAudioDestination, "[waAudioDestinationNode]", ["AudioNode"], {}, { "quiet": "quiet"; }, never, never, true, never>;
}