Sternenherz

Sternenherz music software

Sternenherz Harmony Tool

A visual harmony, chord, scale and MIDI performance tool for composition, music theory, improvisation and expressive DAW workflows.

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  • Standalone / VST3 / CLAP
  • Windows / macOS / Linux
  • Digital license
Sternenherz Harmony Tool interface with piano, circle of fifths, tonnetz and piano roll

Harmony made playable.

Explore music theory visually, turn harmonic ideas into MIDI, and shape performances directly inside one focused creative environment.

Chord and interval detection

Track incoming MIDI, identify chords and intervals, and display alternate names with configurable English/German notation.

Scales, modes and custom modes

Choose curated modes, handle enharmonic spelling, and build your own custom modes for personal harmonic systems.

Circle of Fifths and Tonnetz

Play chords from visual harmonic maps with scale highlighting, progressions, analysis overlays and MIDI output.

Progressions and Tableview

Browse pop, jazz, cinematic, house and RnB progression seeds, then adapt voicings and extensions to your key and mode.

MIDI drag and export

Drag chords, progressions and generated material into your DAW or into the internal Piano Roll for further editing.

Piano Roll and MPE editing

Edit notes, automation, sustain, velocity and per-note expression with MPE pitch, pressure, timbre and pan workflows.

Play & Perform

Perform harmony using Direct, Strum, Arp and Chord Pulse modes with hold behavior, left-hand slots and right-hand correction.

Internal sounds

Audition ideas through Sternenherz Piano, Harpsichord, hybrid keys, synth pads and a soft sine pluck engine.

Plugin hosting

Load external VST3 instruments into the Harmony Tool via its ‘Sounds Settings’, manage favourites, and save plugin presets inside the tool.

See the workflow.

Circle & Tonnetz

Play directly on the Circle of Fifths and Tonnetz. Performances can be recorded into the internal Piano Roll, sent to a DAW, or dragged from the Circle of Fifths into your DAW.

Mode, keynote & scale

Choose a keynote and mode, automatically select the matching key group on the Circle of Fifths, visualize the scale on the keyboard, and use it for MIDI performance modes.

Note editing

Edit MIDI with dedicated Piano Roll tools. The trimming tool makes strumming effects easy, and automation can be edited with drawing shape tools.

MPE Piano Roll

Edit MPE pitchbends with drawing shape tools and modifier-key functions. Keysnap can align pitchbend automation points to the selected keynote and mode.

MPE interval visualization

See interval colorization inside the major Circle of Fifths ring, Tonnetz visualization, and MPE pitchbending with note spread playing back in the Piano Roll.

Built for composers, producers and harmony explorers.

Sternenherz Harmony Tool is designed for people who want harmony to be visible, playable and exportable instead of hidden in theory books or static chord charts.

  • Use it as a composition helper for chord progressions, voicings and modal colors.
  • Use it as a performance tool to generate MIDI from visual chord and scale interfaces.
  • Use it as a learning environment for intervals, functional harmony, scales and chord relationships.
  • Use it as a MIDI editor for expressive clips, including automation and MPE data.

Formats

Standalone app, VST3, and CLAP builds for MAC, Linux, and Windows 11.

AU Format isn’t supported yet.

Trademark notice: VST is a registered trademark of Steinberg Media Technologies GmbH. Sternenherz Harmony Tool is not affiliated with Steinberg.

Buy Sternenherz Harmony Tool

Purchase a digital license and download the installer after checkout. Payment, tax calculation and delivery are handled through Lemon Squeezy.

  • Digital software license for Sternenherz Harmony Tool.
  • Download access and license information delivered after purchase.
  • Email support for installation, activation and basic product questions.
  • Free maintenance updates within the current 0.9 release line unless stated otherwise.

Manual

The manual covers setup, the main interface, Circle of Fifths, Tonnetz, progressions, MIDI drag-and-drop, Play & Perform, Piano Roll editing and MPE workflows.

Open user guide

Quick start

  • Choose a keynote and mode.
  • Play chords from the Circle, Tonnetz, Tableview or keyboard.
  • Shape voicings with inversions, extensions and Play & Perform modes.
  • Drag MIDI into your DAW or edit it in the internal Piano Roll.

FAQ

Frequently asked questions.

What am I buying?

You are buying a digital software license for Sternenherz Harmony Tool, a powerful music composition, harmony visualization and MIDI performance tool which works as Standalone App or VST/CLAP Plugin. You will receive a license key to activate the software upon its first launch.

How is the product delivered?

After checkout, customers receive download and license information digitally through Lemon Squeezy and/or by email.

Which systems and formats are supported?

Standalone app, VST3, and CLAP builds are available for MAC (Apple Silicon required), Linux, and Windows 11. AU Format isn’t supported yet.

How do I get support?

Customer support is available by email: support (at) sternen-herz.de. You can also use the contact form.

What is the refund policy?

Because this is digital software, refunds are handled according to the published refund policy. The german version of the refund policy can be seen here: Erstattungsrichtlinie.

Is this a subscription?

This is no subscription. It is a one-time purchase.

Business and policies

Customer support

Email: support (at) sternen-herz.de
Contact form