Because you can't keep it all in your head!
TrackNotes is a track management system used to document recording sessions studio information. The system has extensive reporting capabilities, including several different versions of track sheets. TrackNotes supports collaboration efforts, and can be a lifesaver if engineers (home and/or professional) ever need to return to a complex project at a later date. TrackNotes also provides a great way for users to understand and review their own and others' production techniques.