HIRC Objects (Advanced Guide) See Audio Length (Advanced Guide) before proceeding. HIRC (Hierarchy) Objects These are the components to the PCK files. They are separated by in the exported XML document. Music Attenuation Determines the force reduction of the overall audio. It is measured by "Curves" which can be scaled by "GraphPoints" using an "Interpolator". MusicTrack Actual components to each individual music track. It determines the "Duration" and "TrimOffSets" of the track. MusicSegment Immediately following a "MusicTrack" is its "MusicSegment". It also determines the "Duration", but it establishes "Music Markers" which actuates when the track starts and ends. MusicSequence Contains the list of all "MusicTracks" that will play in the sequence. It determines the the "TransitionRules" and "Destination Rules" for each Music Track. MusicSwitchContainer Decides when the "MusicTracks" start playing. It is structured much like a "MusicSequence". EventAction Directly responsible for starting and stopping the music. Event Immediately following an "EventAction". This is the individual event that holds the ID which will start or stop.