Abstract: Music playback systems and methods. The system comprises a first storage device and a playback device. The first storage device comprises a plurality of first songs, and a first database storing song information of respective first songs. The playback device comprises a processing module. When the first storage device couples to the playback device, the processing module loads the first database to a temporary space, thus to be aware of the first songs in the first storage device, and provides the first songs on the playback device for selection and playback.

Abstract: A method of digital phase calibration is disclosed. An input signal is sampled using a clock. The sample points of the sampled signal are changed by a scaler. A phase calibration is performed by adjusting the phase of the scaler to obtain an optimum phase for the scaler.

Abstract: A data clearing method. When a computer system boots, a dynamic random access memory (DRAM) therein is cleared by way of suspending refresh cycles thereof within a predetermined period of time.