DM filename extension is also associated with a DRM-protected audio format used to store audio content on Sony Ericsson mobile phones. DM is also the filename extension of an audio file containing vocals, portamento, and arpeggiato audio data created using DeltaMusic program on classic Amiga operating system. A DRM-protected DM file is used to store maps used by Darkest Dungeon video game. This DM file contains source code written in the scripting language used by BYOND. DM filename extension is mainly associated with a script created by BYOND game development environment. DM files mostly belong to BYOND by BYOND.