/**
 * Processes audio data by converting base64 to Float64Array with specific sample rate and bit depth
 * @param data Base64 encoded audio data
 * @returns Float64Array Processed audio samples
 */
export declare function processAudio(data: string): Float64Array;
/**
 * Converte um Blob para ArrayBuffer
 * @param blob Blob para converter
 * @returns Promise<ArrayBuffer> ArrayBuffer resultante
 */
export declare function blobToArrayBuffer(blob: Blob): Promise<ArrayBuffer>;
/**
 * Converte um ArrayBuffer para string base64
 * @param buffer ArrayBuffer para converter
 * @returns String base64
 */
export declare function bufferToBase64(buffer: ArrayBuffer): string;