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Scaler 3Captain Plugins
Paid

Paid software sold through the Scaler Music website.

 Paid

Paid software sold by Mixed In Key, with upgrade deals for existing customers.

Windows, macOS Windows, macOS
  • Chord progression and melody suggestions
  • Makes harmony and music theory approachable
  • Works as VST and AU plugins inside common DAWs
  • Generates chord progressions and melodies as MIDI
  • Paid commercial software
  • Suggestions are theory-based rather than full song generation
  • Paid, with no free version shown
  • Requires a DAW to use
Downloadable app Downloadable app
Closed source Closed source
License not stated License not stated
Not stated if an account is needed Account needed
Not stated if it works offline Not stated if it works offline

Checked September 26, 2026

Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.