/**
 * AudioDynamics.ts
 *
 * Audio dynamics processing: compressor, limiter,
 * noise gate, and sidechain ducking.
 *
 * @module audio
 */
export interface CompressorConfig {
    threshold: number;
    ratio: number;
    attack: number;
    release: number;
    makeup: number;
    knee: number;
}
export interface GateConfig {
    threshold: number;
    attack: number;
    release: number;
    range: number;
}
export declare class AudioDynamics {
    private compressor;
    private gate;
    private gainReduction;
    private gateOpen;
    private envelope;
    private sidechainLevel;
    private ducking;
    private duckAmount;
    constructor();
    setCompressor(config: Partial<CompressorConfig>): void;
    setGate(config: Partial<GateConfig>): void;
    getCompressor(): CompressorConfig;
    processCompressor(inputDb: number): number;
    processGate(inputDb: number, dt: number): number;
    setSidechainLevel(db: number): void;
    processDucking(inputDb: number, threshold: number, amount: number): number;
    limit(inputDb: number, ceiling: number): number;
    getGainReduction(): number;
    isGateOpen(): boolean;
    isDucking(): boolean;
    getDuckAmount(): number;
}
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