/**
 * Mock implementation of sherpa-onnx-node for testing
 */
export declare class OfflineTts {
    constructor(_config: any);
    generate(_options: {
        text: string;
        sid: number;
        speed: number;
    }): {
        samples: Float32Array<ArrayBuffer>;
        sampleRate: number;
    };
}
export declare function writeWave(_filename: string, _options: {
    samples: Float32Array;
    sampleRate: number;
}): void;