export interface TTSOptions {
    languageCode?: string;
    voiceName?: string;
    speakingRate?: number;
    pitch?: number;
    outputPath?: string;
}
export declare class TTSService {
    private client;
    constructor();
    synthesizeToFile(text: string, options?: TTSOptions): Promise<string>;
    synthesizeToBuffer(text: string, options?: TTSOptions): Promise<Buffer>;
}
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