structural / Symbolic
Note Set Sequence Collection
An unordered collection of chord progressions — e.g. a songbook of changes or a library of progressions. A meta-group: a group of groups, whose `groupOf` is note-set-sequence (one level up from a note-set-collection).
How it works
This object can carry concrete values or a musical interpretation, depending on its notation.
It groups note set sequence objects without requiring an order.
Written forms
Ways to write this concept
Each notation describes the same underlying object. Load a playable example to hear one MIDI realization in the Code Sequencer.
list
Canonical: semicolon-separated chord progressions, each a comma/dash chord list.
C-F-G-C; Dm7-G7-Cmaj70-4-7,5-9-0,7-11-2; 0-3-7,5-8-0
Choose Load beside a convertible example to open its live player. Some catalog formats describe analysis or a display label and have no note realization yet.
Concept connections
Pc Set CollectionAn unordered collection of unique pitch class setsPoint Set CollectionA collection of interval patterns (point sets) that are transposition-invariantPc Set Sequence CollectionAn unordered, octave-free collection of pc-set progressions. The pitch-class abstraction of a note-set-sequence collection; its `groupOf` is pc-set-sequence.Point Set Sequence CollectionAn unordered, transposition-invariant collection of point-set progressions — a library of progression shapes independent of key. Its `groupOf` is point-set-sequence.Note SpaceA 128-bin distribution over MIDI notes. Counts or weights retain register and repeated occurrences.NoteOne concrete MIDI pitch with an octave. Its pitch class keeps the note name while discarding that register.