import { VoiceActor, Talk } from '../../../types';
import { VoiceEngine } from './VoiceEngine';
/**
 * NijiVoice voice synthesis engine
 */
export declare class NijiVoiceEngine implements VoiceEngine {
    fetchAudio(input: Talk, speaker: string, apiKey?: string, voiceActor?: VoiceActor): Promise<ArrayBuffer>;
    private processEmotionParams;
    private base64ToArrayBuffer;
    getTestMessage(textVoiceText?: string): string;
}