Free MIDI harmony

Melody Harmonizer

Melody Harmonizer product image

A free MIDI harmony plug-in that imports or captures a melody, generates a chord progression in Basic or Complex mode, previews the result with a built-in piano, then lets you drag the generated MIDI back into the DAW.

Free

From melody to harmony

Melody Harmonizer is built for the common songwriting moment where you already have a usable topline, but you want the supporting chords quickly. Instead of forcing a separate utility workflow, it reads imported or captured MIDI and turns that melody into a chord-based accompaniment inside one focused interface.

Built for DAW workflow

The plugin is meant to get you to the next draft faster, not trap the result in a closed environment. Once the harmony feels right, you can drag the generated MIDI chord progression into the DAW and continue editing the voicings, timing or arrangement there.

Key features

  • Import a MIDI file or capture host playback, then generate accompaniment without leaving the plugin workflow.
  • Choose Basic or Complex mode for a simpler or more detailed harmonic response.
  • Drag the generated MIDI chord progression back into the DAW and continue arranging there.

FAQ

Quick answers to the most common product and setup questions.

What does Melody Harmonizer generate?

It analyzes a loaded or captured melody and generates a chord progression around it, previewed with chord-focused piano material inside the plugin.

Can I use MIDI that already exists in my DAW project?

Yes. You can import a standard MIDI file or arm MIDI Capture and let the plugin record the notes from host playback.

How do I use the generated result in my DAW?

Drag the generated MIDI chord progression from the plugin back into the DAW and continue editing it there.

Is the plugin really free?

Yes. Any registered Bitsonic user can download Melody Harmonizer from the product page or profile without a separate purchase.

How do I install it?

Copy the plugin to the correct VST3 or AU folder for your operating system, rescan plugins in the DAW, then load or capture a melody before generating harmony.

How do I access older purchases from the previous store?

If you had an older Bitsonic or Ecwid account, open the login page with the same email address and use the password reset or activation flow. After signing in, your older purchases linked to that email will appear on your profile download page.

More from Bitsonic

Explore other instruments and effects from the current lineup.

Keyzone Classic 4 product image
Piano collection

Keyzone Classic 4

A focused keyboard collection with acoustic pianos, electric pianos and organ tones, built for quick playing instead of endless patch hunting.

$69 3 bonus plug-ins
Easy Peasy product image
Fast mastering

Easy Peasy

A mastering plugin built for quick, confident results across stereo and supported multichannel work: automatic balance, controlled dynamics, adaptive width, tasteful saturation, bass reinforcement and loudness finishing in one direct workflow.

$69 3 bonus plug-ins
Pop Violin product image
Bonus unlock

Pop Violin

A single paid Bitsonic purchase unlocks Pop Violin instantly, but the real offer is bigger: the same account also gets AI Bass Ultimate 2 and Ballistic Pulse right away.

Free if you buy 3 bonus plug-ins
Quick answer

What is Melody Harmonizer?

A free MIDI harmony plug-in that imports or captures a melody, generates a chord progression in Basic or Complex mode, previews the result with a built-in piano, then lets you drag the generated MIDI back into the DAW.

Access
Free. Free for every registered Bitsonic account. Sign in once and the current download appears in your profile automatically.
Formats
macOS AU, macOS VST3, Windows VST3 64-bit, Linux VST3
Best for
Free melody-to-chords workflow for turning MIDI toplines into playable accompaniment.
Manuals
Installation guide and manual