DS2 is an audio file that stores compressed voice recording data. DS2 format was developed by Olympus under the name Digital Speech Pro. DS2 files are typically created by digital voice recorders.

DS2 forrmat is popular in such areas as journalism or science and education. Olympus DS2 files can be converted into other audio formats, including WAV. It is worth noting that only select voice recorders use DS2 format for storing recorded data.