import { InferenceSession } from 'onnxruntime-react-native';
declare class ValtecTTSEngine {
    static TAG: string;
    static SAMPLE_RATE: number;
    private sessions;
    private ttsConfig;
    isInitialized: boolean;
    constructor();
    initialize(): Promise<void>;
    private getModelDirectory;
    private downloadUrls;
    downloadModels(onProgress?: (progress: number, fileName: string) => void): Promise<void>;
    deleteModels(): Promise<void>;
    loadConfig(): Promise<void>;
    loadModel(fileName: string, options: InferenceSession.SessionOptions): Promise<InferenceSession>;
    synthesize(text: string, speakerId?: number, noiseScale?: number, lengthScale?: number): Promise<Float32Array>;
    close(): Promise<void>;
}
export default ValtecTTSEngine;
//# sourceMappingURL=ValtecTTSEngine.d.ts.map