A device of updating a media file for an increased resolution includes an I/O interface, a processor, and a storage device. The I/O interfaces acquires a first media file having first data samples and a second media file having second data samples. Each first data sample is sampled from an analog media signal and encoded with P bits and each second data sample is sampled from the analog media signal and encoded with Q bits, wherein “P” and “Q” are integers, and a resolution in bits of Q is greater than a resolution in bits of. The processor divides each second data sample by a corresponding one of the first data samples to calculate third data samples. The storage device stores the calculated third data samples as a third media file.