import type { TtsEngine, TtsVoice, SynthesizeOptions, SynthesizedAudio } from "../types";
export interface KokoroOptions {
    model?: string;
    dtype?: "fp32" | "fp16" | "q8" | "q4";
    defaultVoice?: string;
}
export declare class KokoroTtsEngine implements TtsEngine {
    readonly id = "kokoro";
    readonly supportedLanguages: readonly ["en"];
    private model;
    private loading;
    private readonly opts;
    constructor(opts?: KokoroOptions);
    isAvailable(): Promise<boolean>;
    listVoices(): Promise<TtsVoice[]>;
    synthesize(text: string, opts?: SynthesizeOptions): Promise<SynthesizedAudio>;
    private supportsLanguage;
    private loadModule;
    private load;
}
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