structural / Symbolic
Point Set Sequence Collection
An unordered, transposition-invariant collection of point-set progressions — a library of progression shapes independent of key. Its `groupOf` is point-set-sequence.
How it works
Its shape has no fixed root. Choose an anchor before turning it into absolute MIDI notes.
It groups point 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 point-set progressions (offsets from each chord's root).
0-4-7,0-3-7,0-4-7; 0-3-7,0-4-7
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
Note Set CollectionAn unordered collection of unique note setsPc Set CollectionAn unordered collection of unique pitch class setsNote Set Sequence CollectionAn 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).Pc 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 SpaceA distribution over relative semitone positions from an anchor. It retains weighted shape while discarding absolute MIDI register.PointA relative pitch position measured in semitone steps. Anchor it to a note to obtain an absolute pitch; keep it unanchored to compare transposed shapes.