Files that have the AOB extension are used to store digital audio streams. It is data compressed with the MPEG-2 standard. In addition to audio data, they also contain information on navigation and search. AOB files are placed on DVD-Videos as movie soundtracks. Throughout the video project, they are saved in the AUDIO_TS folder.

AOB is a format that LPCM (Linear Pulse-Code Modulation) uses for encoding.