*.h2pattern: XML file describing a single pattern. Patterns are group of beats and are managed in the Pattern Editor.

*.h2song: XML file describing the whole song (or sequence). Songs are groups of patterns managed using the Song Editor, groups of instruments comprising the current drumkit and managed via the Instrument Editor, as well as all states not already covered by the Preferences.

*.h2playlist: XML file describing a playlist. A Playlist is a (ordered) group of songs.

*.h2drumkit: a compressed folder containing all sound samples composing a drumkit and the description XML file drumkit.xml storing the kit's structure and parameters.

*.h2theme: XML file describing all preferences available in the Appearance tab of the Preferences.