PianoPiano Accompaniment Generator · VST3 / AU
Piano is a piano accompaniment generator: give it a chord progression and it writes the part a player would play. The left hand accompanies and the right hand carries the melody, the way the instrument actually works, with the sustain pedal written into the exported MIDI and moving with the harmony. Pick a recorded preset or generate a new pattern, from pop ballad through cinematic underscore.
Give it chords
Drag a MIDI clip in from your project, or build a progression inside the plugin in seconds.
Press Generate
A pattern is laid across your harmony, filtered by character and shaped by rate, voice and velocity.
Drag it out
The finished MIDI drops onto any track in your DAW, into any instrument you own. Usually under a minute.
Chords
Root Key
Length / Time
Chords
4 Chords▾Pattern Source
Character
Dynamics
Octave
Rate
Start
Hands
Chords - drag a border to resize, drag the middle to move, click to change, wheel for octave
Inside the window
Two voices, like the instrument. The left hand accompanies, the right hand plays the melody.
Two voices, like the instrument. The left hand accompanies, the right hand plays the melody.
See and hear it
Trailer and walkthrough
How the library was built
Two hands, one pedal, on every chord.
Every figure in the library was checked against the chord it sits on. On every chord the left hand puts the root on beat one, the right hand is corrected to the harmony, and the pedal changes with the chord, in any meter. What was recorded in 3/4 plays in 4/4, 5/4 or 12/8 without the left hand ever being stretched.
Music is not arithmetic, though. A passing note can pull against a chord and still be the right choice, which is why the roll, the hand mutes and the pattern history sit one click away. Nothing here is locked.
In detail
What it actually does
Two hands, two jobs
Left hand and right hand, the way the instrument actually works. The left hand accompanies: bass, harmony and pulse. The right hand carries the melody on top. No third layer in between.
The root lands on beat one. Always.
Every chord gets its bass note on the downbeat, and that note is the chord root. The left hand is never missing from a chord and never harmonically wrong.
The pedal is part of the output
CC64 is written alongside the notes and travels with the drag-and-drop export. It is not something you add afterwards in the DAW.
The pedal follows harmony, not bar lines
It changes at every chord change, in any meter, rather than repeating the bar structure of whatever take the figure was recorded in.
A 3/4 figure plays in 4/4
Only the right hand extends to fill the extra beat. The left hand is never stretched, because its job is the harmonic anchor. The same rule holds for 5/4 and 12/8.
The melody keeps its order
A right hand recorded across four bars plays back in that order: what was at bar one arrives at bar one, even when the chords underneath were generated.
Optional start-bar shift
Move the melody’s entry, bar four’s material to bar one for instance, and the harmony is corrected automatically, without you editing a note.
Chords stay on the beat
Every chord gets whole bars. Ask for more chords than bars and a bar is split on a beat, never between two. The total always adds up to the length you chose.
Recorded presets, or generate one
The core of the library is played by hand: one MIDI file per pattern, with left hand, right hand and pedal on separate tracks. Press Generate and the engine builds new patterns from those performances, the same way Ostinato does, so a pattern that never existed before still sounds played.
Pop ballad through cinematic
The same engine covers a plain ballad accompaniment and something that sits under a cue. It is the figure that changes, not the rules.
Two faders and a switch
Left hand and right hand each get a level fader with mute and solo. Mute the left hand and the melody stands alone; mute the right and only the accompaniment is left. The pedal is a switch, on or off, because a sustain pedal is not a volume.
In Key, one click away
The In Key filter runs live over the finished notes: anything outside the key of your progression is pulled back into it, while the chord’s own notes stay untouched. Switch it off and you hear the raw figure.
Shares Ostinato’s engine
Same chord input, same beat-based timing, same drag-out. If you know one plugin, you already know the other. In FL Studio, chords go in as an exported MIDI file: how it works.
Specification
Technical
- Plugin type
- VST3 and AU instrument
- Voices
- Left hand (accompaniment) and right hand (melody), each with fader, mute and solo · pedal on/off
- Pedal
- CC64, chord-synced, included on export
- Meters
- 3/4 · 4/4 · 5/4 · 12/8; right hand adapts, left hand never does
- Pattern source
- Recorded presets + generation, separate tracks per hand
- Export
- MIDI drag-and-drop to any DAW, pedal included
- Licence
- 2 machines per licence · offline activation
Piano
Chords in, a played piano part out. Accompaniment in the left hand, melody in the right, pedal included, as editable MIDI.
- StatusIn development
- FormatVST3 · AU
- SystemsmacOS · Windows
- Licence2 machines