import { Talk } from '../../../types';
import { VoiceEngine } from './VoiceEngine';
/**
 * VoiceVox voice synthesis engine
 */
export declare class VoiceVoxEngine implements VoiceEngine {
    private apiEndpoint;
    fetchAudio(input: Talk, speaker: string): Promise<ArrayBuffer>;
    /**
     * Adjust parameters according to emotion
     */
    private adjustEmotionParameters;
    getTestMessage(textVoiceText?: string): string;
    /**
     * Set custom API endpoint URL
     * @param apiUrl custom API endpoint URL
     */
    setApiEndpoint(apiUrl: string): void;
}