The MSM9841 is a mono/stereo record and playback LSI with a built-in 1K bit FIFO for easy interface with external systems or non-semiconductor memory. It utilizes multiple record and playback modes, including the new ADPCM2 algorithm, which allows for even higher quality sound reproduction. The record and playback functions of the MSM9841 is controlled by an MCU via 8/16-bit bus interface.