import type { Filter, FiltersPayload } from "./types.js";
export declare class PlayerFilters {
    #private;
    /**
     * Pitch multiplier applied on top of any preset pitch.
     *
     * - **Default:** `0` (no override — preset value is used as-is)
     * - **Normal playback:** `1.0`
     * - **Recommended range:** `0.5` – `2.0`
     * - Values below `0` are clamped to `0`. Values above `2.0` will work
     *   but progressively degrade audio quality due to resampling artifacts.
     *
     * When a preset like {@link Filter.Nightcore} is active (which sets pitch
     * to `1.3×`), this value is **multiplied** on top: e.g. `pitch = 0.5`
     * with Nightcore → effective pitch = `1.3 × 0.5 = 0.65`.
     */
    get pitch(): number;
    set pitch(value: number);
    /**
     * Speed multiplier applied on top of any preset speed.
     *
     * - **Default:** `0` (no override — preset value is used as-is)
     * - **Normal playback:** `1.0`
     * - **Recommended range:** `0.25` – `3.0`
     * - Values below `0` are clamped to `0`. Extreme values (e.g. `>5.0`)
     *   will work but may cause audible quality loss since more source
     *   samples are consumed per output frame.
     *
     * When a preset like {@link Filter.Vaporwave} is active (which sets speed
     * to `0.8×`), this value is **multiplied** on top: e.g. `speed = 1.25`
     * with Vaporwave → effective speed = `0.8 × 1.25 = 1.0`.
     */
    get speed(): number;
    set speed(value: number);
    /**
     * Toggle a filter on or off. If `enabled` is omitted the filter is
     * flipped from its current state.
     *
     * **Preset filters** ({@link Filter.Nightcore}, {@link Filter.Vaporwave})
     * adjust both speed and pitch by fixed amounts (1.3× and 0.8×
     * respectively). Enabling both simultaneously multiplies their effects
     * together (effective speed = `1.3 × 0.8 = 1.04`).
     *
     * **DSP filters** ({@link Filter.Tremolo}, {@link Filter.Vibrato},
     * {@link Filter.Rotation}, {@link Filter.LowPass}) modify the audio
     * signal in-place and can all be enabled simultaneously — they are
     * applied in sequence (tremolo → vibrato → rotation → lowpass).
     */
    toggle(filter: Filter, enabled?: boolean): this;
    /**
     * @returns `true` if any filter is active or if pitch or speed are non-zero.
     */
    get active(): boolean;
    /**
     * @returns an array of all active filters.
     */
    get activeFilters(): Filter[];
    get(filter: Filter): boolean | undefined;
    clear(): void;
    toPayload(): FiltersPayload | undefined;
}