MusicDevelopments has updated RapidComposer to v3.83. The latest update includes macOS Catalina support and many improvements and bug fixes.


  • Dropping folders to the phrase and rhythm browsers to import MIDI files as phrases/rhythm patterns has been implemented.

  • MIDI file batch conversion to scale-relative phrases is possible when you drop MIDI files on the Phrase Browser.

  • Filling a track with phrases reworked. Hold down Shift to use ghosts, and Ctrl to activate the magnet when filling a track. Six new keyboard shortcuts added for various phrase generators.

  • Track is made empty before filling it with phrases.

  • New experimental phrase generator: 'Random Note Generator' which is useful for triggering patterns/keyswitches.

  • It is possible to replace chords, add-remove chords, change chord lengths during the chord progression preview.

  • When splitting ghost phrases, they are converted to regular phrases (ghosts always inherit the original size).

  • Fixed: incremental saving never overwrites existing files.

  • Fixed a MIDI import issue with zero-length notes.

  • Splitting resized/scaled phrases fixed.

  • [Windows] Text editing field redraw issues fixed.

  • [macOS] macOS Catalina support.

  • [macOS] Fixed text editing fields sometimes remaining on screen.



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