State Space Composer

Original Motive

Edit ABC Notation

Controls

Advanced Options

Variants Count

Transpose Scale

Integer Transpose

Pitch Quantization

Rhythm Base

Rhythm Quantization

Variable Length

Ornament Style

Contour Invert Prob

Expanded Dynamics

Expression Handling

Neural Model

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Variations will appear here

Enter or edit your motive in ABC notation (left panel)
Adjust the knobs to set how much each dimension may vary
Click Generate Variations to produce a batch of variants
Browse variants, click Select on the ones you like
Click Train Selection — the generator adapts to your taste
Repeat from step 3 to refine further

Notes

`C D E F G A B`	Middle-C octave
`c d e f g a b`	One octave up
`c'`	Two octaves up
`C, D,`	One octave down

Accidentals

`^C`	C sharp
`_B`	B flat
`=C`	C natural
`^^C __B`	Double sharp / flat

Durations

`C2`	Double the unit length
`C/2`	Half the unit length
`C3/2`	Dotted (1.5× unit)
`C4`	4× unit length

Rests

`z`	Rest (unit length)
`z2`	Rest (double)

Bar Lines

`\|`	Bar line
`\|\|`	Double bar
`\|:` `:\|`	Repeat start / end

Dynamics

`!pp!` `!p!` `!mp!`	Soft dynamics
`!mf!` `!f!` `!ff!`	Loud dynamics

Place before the note: !mf! C2

Hairpins (Crescendo / Diminuendo)

`!<(!` … `!<)!`	Crescendo
`!>(!` … `!>)!`	Diminuendo

Articulation

`.C`	Staccato
`-C`	Tenuto

Slurs & Ties

`(C D E)`	Slur over 3 notes
`C- C`	Tie (same pitch)

Header Fields

`X:1`	Tune number (required)
`T:Title`	Tune title
`K:C`	Key signature
`M:4/4`	Time signature
`L:1/8`	Default note length
`Q:120`	Tempo (BPM)

Reference: ABC Standard v2.1 (Chris Walshaw)