I had a Feature Request a while ago that suggested multiple ways a track could be implemented, i.e.
Existing track types:- audio
- MIDI
Suggested new track types:- marker/arranger (song sections)
- To Do list
- lyrics
- chords
- BPM ruler
- SMPTE ruler
- blank (for spacing large projects)
Etc
Basically you would be able to add in multiple track types of the new kind. So I could have multiple marker/arranger tracks (one could be used to describe low level song sections, such as verse, chorus, etc., and another could be high-level sections, such as part 1, part 2, etc.). I could also add in multiple BPM/SMPTE ruler tracks so that these line up against any audio/midi track for ease of reading etc. (this would be especially useful if a I had a movie sound track that required noises at a particular time, whereas another audio track was lined up against an BPM ruler for musical purposes). Etc
Ref:
http://forum.cakewalk.com/FindPost/3224819