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RapidComposer free download for Mac


Version 3.51

Music prototyping software.

RapidComposer overview

RapidComposer is a rapid music prototyping software designed for composers, song-writers and musicians of all musical styles. Whether you are a seasoned professional or simply ready to take your music to the next level, RapidComposer is the complete solution you need for faster and more productive music composition.

  • Advanced tools for phrase editing, phrase generation, phrase morphing, phrase grouping, motif development, chord progression editing
  • Master track with chords (absolute or chord functions) which all phrases automatically conform to
  • Piano roll with scale notes, visually editable chord notes, and smart arranging of overlapped notes in two styles
  • In-place non-destructive phrase-level and note-level editing
  • Sophisticated MIDI CC editing and recording
  • Articulations can be assigned to phrases or even individual notes
  • Extensive scale, chord, guitar chord, chord progression databases
  • Taggable instrument browser of all MIDI, VSTi and SF2 presets in one place
  • IdeaTool that can generate a multitrack composition based on the provided parameters and rules
  • Unlimited undo and the ability to make several versions of the same composition
  • Fully customizable user interface with preset themes
  • MIDI Drag And Drop tracks or composition to DAWs
  • Virtual instruments (VSTi v2.4 plugins) support
  • SoundFont (.SF2) support
  • Standalone and VST version

RapidComposer LE is available here.

What’s new in version 3.51

Updated on Aug 31 2018

Version 3.51:
  • New MIDI Export option: Set 'Note Off' Velocity To Zero
  • Shortcut added for saving selected phrases
  • Fixed an issue in undo history handling: when removing all earlier versions, not all files were deleted
  • Fixed: duplicating a line or part did not duplicate the phrases in note editing mode
  • Fixed: it is possible to use Undo after dropping a chord progression on the master track
  • Fixed two issues with phrase generator preview
  • Fixed: sometimes notes jumped to C-1 during editing
  • Fixed bug when converting slash chords from/to universal notation





49.8 MB



App requirements

  • Intel 64
  • Intel 32
  • Mac OS X 10.7 or later
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