analysis / Symbolic

Note Space

A 128-bin distribution over MIDI notes. Counts or weights retain register and repeated occurrences.

Try it

Count concrete MIDI notes

Add notes to a small sample. Repeated notes add weight. A note space keeps 128 MIDI bins; folding it combines octaves into twelve pitch-class bins. Measuring every note from the lowest one gives a rootless point space. Transposition moves the note and pitch-class weights while leaving relative points unchanged.

Click a note to add another occurrence. Up to twelve events can be loaded in the player.

Transpose0 st

Twelve pitch-class bins

Db0

Eb0

Gb0

Ab0

Bb0

Occupied MIDI bins

C3 · 48

C4 · 60

E4 · 64

G4 · 67

Source MIDI events

48,60,60,64,67

Sparse note space

48:1,60:2,64:1,67:1

PC-space counts

3,0,0,0,1,0,0,1,0,0,0,0

Normalized PC weights

0.60,0.00,0.00,0.00,0.20,0.00,0.00,0.20,0.00,0.00,0.00,0.00

A set records presence only; these spaces preserve occurrence counts. Normalized values are derived from the same counts.

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.

histogram

Frequency distribution across all 128 MIDI note positions

0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,0,0,5,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,7,0,0,0,0,0,0,2,0,0,0,0,12,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0

pairs

Sparse representation as note:count pairs

60:12,64:7,67:5,55:2,36:1
48:8,52:6,55:10,57:4,60:15

weighted

Notes weighted by occurrence count

60-60-60-64-64-67
48-48-48-48-52-52-52-55-55-55-55-55

vector

Normalized feature vector for ML embeddings

[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0.1,0,0,0.17,...]

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.

Pitch-class spaceA twelve-bin distribution of pitch-class weights. It combines matching pitches across octaves while retaining their counts.Point SpaceA distribution over relative semitone positions from an anchor. It retains weighted shape while discarding absolute MIDI register.NoteOne concrete MIDI pitch with an octave. Its pitch class keeps the note name while discarding that register.Note setA group of concrete MIDI pitches with octaves. It specifies one voicing and can be reduced to pitch classes or a rootless point shape.Note RangeThe span between a lowest and highest MIDI note. It describes a register boundary, not every note inside it.Note Set CollectionAn unordered collection of unique note sets