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structural / Symbolic

Point sequence

An ordered, rootless pitch contour. An anchor note turns its relative positions into a concrete line.

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Edit pitch and time independently

A line combines ordered pitches with durations. Its rhythm keeps only the time pattern; its point sequence keeps relative pitch movement without a fixed register. Transposing shifts sounding notes while both abstractions stay the same.

Event 1

Event 2

Event 3

Event 4

Event 5

Transpose0 st

Timeline · 5 beats

C41 beat
E41 beat
G42 beats
Rest0.5 beats
C50.5 beats

Melody · MIDI:beats

60:1,64:1,67:2,r:0.5,72:0.5

Point sequence

0:1,4:1,7:2,r:0.5,12:0.5

Rhythm

1,1,2,r0.5,0.5

Pitch classes

0,4,7,~,0

The sequencer pattern uses Strudel duration weights: a two-beat event occupies twice the cycle span of a one-beat event.

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.

offsets

Order only, no durations: comma-separated point offsets from the start.

  • 0,2,4,5
  • 0,4,7
  • 0,3,7,10

beats

Canonical timed notation: comma-separated point:duration pairs (non-negative offsets from the start), duration in beats (quarter = 1). Use 'r' for a rest.

  • 0:1,2:0.5,4:0.5,5:2
  • 0:2,r:1,7:1
  • 0:1,4:1,7:2

ticks

MIDI-like: point:duration pairs with the duration in MIDI ticks (default 480 PPQ).

  • 0:480,2:240,4:240,5:960
  • 0:960,r:480,7:480

ms

Absolute time: point:duration pairs with the duration in milliseconds (default 120 BPM).

  • 0:500,2:250,4:250,5:1000
  • 0:1000,r:500,7:500
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 sequenceAn ordered line of notes and optional rests. Adding durations makes its rhythmic placement explicit.Pitch-class sequenceAn ordered line of pitch classes without fixed octaves. Choose registers to turn it into MIDI notes.RhythmA sequence of durations and rests without pitches. It can time a melody without changing its note choices.Fractional Rhythmic PatternRhythmic patterns based on fractional subdivisions of timePoint Set SequenceAn ordered sequence of point-sets that may contain duplicatesPoint song formA song form reduced to non-pitch-specific shapes — section labels and order are kept, but each chord is a point-set (offsets, no key). This is the transposition-invariant structural fingerprint of a song: two songs in different keys with the same form land on the same point-song-form, so it is the natural representation for song-to-song similarity. Its `groupOf` is point-set-sequence.
Sources and playback

Concept descriptions and examples were adapted from Codex Music Mono’s typed catalog and concept examples. The Code Sequencer plays MIDI through a connected instrument; Symbolic does not synthesize sound.