February 23, 2023: v4.6.2

• Fixed crashing bug when all tracks were removed
• [Plug-ins] Fixed crashing bug when dropping a phrase/instrument/scale/chord in a closed and re-opened window
• [Plug-ins] Fixed hanging notes during phrase preview when selecting a phrase

February 20, 2023: v4.6.1

• MIDI import: imported MIDI is zoomed out when loaded
• MIDI import: MIDI CC's are displayed as events, not curves
• MIDI import: LSB of 14-bit controllers are not added to the imported MIDI CC's as a separate CC
• Fixed: 2/4 grid lines disappeared when zooming when grid was set to 2/4
• Fixed: VST3 plug-in resizing to a bigger size resulted in black areas
• Fixed a bug when auto-harmonizing many phrases at once

February 6, 2023: v4.6.0

• VST3 instrument plug-ins supported
• Instrument plug-in handling simplified: the 'multi-timbral plug-in' setting was removed, all plug-ins are handled equally. If you select a plug-in from the 'Loaded plug-ins' section, it will use the existing loaded plug-in instance, otherwise choosing from the menu will load a new instance.
• Searchable lists for plug-ins, settings, keyboard shortcuts, UI colors
• Smart instrument menu displays instruments based on your usage statistics
• Drag phrase directly to a DAW from the Phrase Editor
• MIDI keypresses can be assigned to any functions as shortcuts
• [Windows][Plug-ins] Using keyboard shortcuts is possible even if the plug-in host does not support that! Select the small keyboard in the upper right corner. Deselect it to allow the host to process keypresses.
• 'Replace Selection' option added to the Idea Tool to replace the contents of the timeline selection
• Idea Tool 'generate' button is always displayed after using the Idea Tool
• Tonnetz visual improvements
• File menu: "Save composition (selection only)" added with shortcut
• Track inspector: "Duplicate track with new plug-in instance" added with shortcut
• Right-click on the structure bar will select the timeline and master track for the line, Shift-right-click will do the same for the part
• Keyboard focus border is hidden if window looses keyboard focus, and shown if window becomes keyboard focus (this is important for the plug-ins) 
• [macOS] New setting: 'Disable retina screen detection'
• New setting: 'Enable mouse-wheel over track sliders' (disabled by default)
• Dozens of chord progressions added with voicing kindly contributed by Robin Bergsohn
• "Merge composition" menus fixed, and set up automatically when track names match
• User guide updated

January 23, 2023: v4.5.2

• New setting: 'Enable mouse-wheel over track sliders' (disabled by default)
• Timeline range selection added to the Phrase Editor and Melody Editor (Ctrl-drag on the timeline to make a selection). When there is a selection, only the selection is played back.
• In the MIDI Mutator you need to hold down Ctrl for timeline selection to be consistent with Phrase Editor and Melody Editor
• Fixed composition templates which used the old V3 file format
• Fixed scroll bar when using the Idea Tool
• Fixed a bug in MIDI Mutator when new MIDI was dropped but some operations used the previous state
• Fixed a bug in the standalone version that caused the program hanging during exiting when VST plug-ins were used

December 14, 2022: v4.5.1

• Slider improvements and fixes; mouse-wheel can be used over track sliders
• [macOS][Plug-ins] Fixed window size for re-opened plug-in window on retina screens
• [macOS] Cursor fixes: eraser cursor was not shown, pencil cursor had wrong color
• [Plug-ins] Fixed crash when closing and re-opening the window with the note inspector open
• Fixed: hanging notes when adding pitch bend to a note

December 5, 2022: v4.5.0

• Reworked MIDI CC and parameter editing with curves (exponential or S-curve) or individual events
• Reworked MIDI CC processing with improved precision (floating point values). 14-bit MIDI CC's are supported.
• Add MIDI CC's for phrases and notes (in the Phrase Editor). Controller data are attached to phrases/notes as you move them and can be saved.
• New LE features: articulations and melody generators were added to the light edition!
• [Plug-ins] The UI engine was replaced in the plug-ins. As a result retina screens are also supported in the plug-ins on macOS.
• Dozens of UI changes to improve the UI on Retina (macOS) and HiDPI (Windows) screens
• Double-clicking on the timeline selection will zoom into the selection
• Horizontal zoom on the timeline is very smooth now (in Composition, Phrase Editor, Melody Editor, MIDI Mutator)
• Instrument menu better organized in the track inspector
• Articulations included for Amadeus Symphonic Orchestra Kontakt library and the four sections of Red Room Audio Palette Kontakt library (contribution by Jose Eulogio Sanguino Payan)
• Fixed: when using default.rcCOMP for new compositions, it is not overwritten for a 'Save'
• Fixed crash when dropping a phrase on another one and selecting 'Replace Phrase'
• Fixed a rare crash during editing a phrase generator
• Bugs of MIDI recording fixed (crashes and recording offset)
• User guide updated: a new chapter added explaining MIDI CC editing
• Many stability improvements

July 18, 2022: v4.4.3

• New setting: Reset Phrase Editor, MIDI Mutator and Chord Rules Editor for New Composition
• New setting: Past 'History' states to store
• Fixed: VST plug-in instance issues when duplicating a track
• Fixed a 'division by zero' error in the Modern Random Rhythm generator
• [macOS, plug-ins] Fixed a crash after the plug-in was unloaded

July 4, 2022: v4.4.2

• [MIDI Mutator] Recalling a MIDI Mutator preset won't disable the 'Apply Changes' button
• [MIDI Mutator] Notes are updated live when moving the chord edges
• [MIDI Mutator] Fixed internal inconsistency because of playback (e.g. 'randomize progression' did not work sometimes)
• Ctrl-up/down transpose selection by semitones in the Phrase Editor
• Fixed: editing notes during Phrase Editor loop playback are heard immediately
• Fixed: due to a compiler bug harmonization crashed in the plug-in (but not in the standalone, or on macOS!)

June 29, 2022: v4.4.1

• Fixed: VST plug-ins are properly instantiated when a composition is reloaded

June 13, 2022: v4.4.0

• MIDI Mutator tab added for manipulating MIDI files (change rhythm, timing, accents, chords, voicings, pitches of loaded MIDI files)
• Auto-regeneration options added for phrase generators: change the rhythm and/or notes at the end of loop or on stopping playback.
• New rhythm generator: 'Modern Irregular Rhythm' suitable for modern genres
• New chord suggestion that looks up chords with the same bass note: Bass pedal tone chords
• New chord suggestion that looks up chords with the specified melody note: Melody pedal tone chords
• 'Scale Degrees' received a note filter where you can filter the displayed chords by notes (e.g. when using a melody pedal tone)
• Optimized phrase rendering and MIDI import (chord detection is many times faster)
• Smoother horizontal zooming
• Splash screen shown during initialization
• UI option to use color buttons (can be customized or turned off entirely)
• Small UI cleanup in Quick Suggestions

April 25, 2022: v4.3.4

• [macOS] New setting: Invert scrolling direction
• New setting: Load 'default.rcCOMP' for 'New Composition'.
• The piano keyboard can be removed from the tracks ('Show Keyboard' in the menu)
• 'Remove Unused Motives' added to the Melody Editor context menu
• Fixed: dragging MIDI from the plug-in to DAW during playback sometimes included wrong notes
• Fixed a crashing race condition bug
• Fixed: pop-up help stopped working after opening a pop-up menu
• [macOS] Fixed mouse coordinates when RC window dragged from retina to non-retina screen
• [macOS] Too fast scrolling on Apple Trackpad or Magic Mouse improved

February 14, 2022: v4.3.3

• 'Reload all articulations' menu item added to Controller menu in the track inspector
• Fixed crash when dragging a folder track
• Fixed crash during editing Strum Pattern Generator
• [macOS] Fixed UI layout issues in the demo version on retina displays
• [Plug-ins] Fixed crashing bug when using soundfonts in the plug-ins
• Various stability fixes

January 10, 2022: v4.3.2

• Scrolling settings (speed, acceleration, deceleration) added under Settings / User Interface
• Arpeggiator has a 'generate' button, improved 'Random' setting
• [macOS] Fixed visual issues on retina, UI optimizations for high-DPI screens
• [macOS] Fixed too fast scrolling
• [macOS] Redo is command-shift-Z by default
• Removed pop-up menu unnecessary title in Melody Editor
• Fixed: inspector windows when opened outside the main window, were always-on-top regardless of the settings
• Fixed using negative octave offset in the phrase inspector (in the allowed notes)
• Fixed a note editing bug when editing Motive Generator (wrong scale used as a reference)
• [macOS, AU] Fixed: when opening RC in a separate window, resizing the window did not work 

December 30, 2021: v4.3.1

• [macOS] UI fixes and improvements on retina resolutions
  
• Redesigned scrollbars, scrollbar width setting is reset to 'Auto' 
• Fixed redraw and window size issues in Chord Selector
• Fixed dragging from the Chord Selector
• [macOS] Fixed mouse cursor (it was always an arrow)
• [macOS] Fixed crash when opening menus
• Other small fixes for issues appeared in v4.3

December 13, 2021: v4.3

• New UI engine with hardware acceleration, retina display support and smooth scrolling
• [macOS] Apple M1 is natively supported
• [macOS] AU synth plug-in supports 128 MIDI channels!
• Dragging and dropping selected chords on the master track is possible
• Reworked chord rules editor toolbar
• New MIDI import setting: Import MIDI markers as chords
• New variation: Insert Connecting Notes
• New variation: Insert Connection To Next Phrase
• 'Learn' functionality in Markov Melody generator: drop a monophonic MIDI file or a phrase on the Learn button!
• Cosmetic changes on the Markov Melody UI, a missing option added
• Tolerance option added to Join Notes
• Phrase variations: 'Remove Note' variation improvements: specify number of notes/events for 'Random notes' and 'Random times'
• [Plug-ins] New playback option: 'Sync playback to host'
• Shortcuts Ctrl-Z/Cmd-Z and Ctrl-Y/Cmd-Y work in the Phrase Editor
• Chord rules are looked up for church modes and chromatic scale (when unlocked), not just for major and minor scales
• Last edited rules are saved and restored between sessions
• Lower case is used for labels
• [Plug-ins] Fixed silent or swallowed notes at the beginning of a loop for local playback: usage of 'all notes off' removed
• [macOS][Plug-ins] Crash fixed when right clicking on a phrase magnet
• [Windows] Installer updated

September 27, 2021: v4.2.3

• Ctrl-Drag Master Track chords as MIDI file (timeline selection, or all when there is no selection). Use Ctrl-Shift-drag for voice leading.
• Phrase variations: 'Remove' and 'Remove All' work for all selected phrases
• Phrase variations: setting a parameter works for all selected phrases
• Shortcut added for showing/hiding the browser (unassigned by default)
• [Melody Editor] Playback option added to play the chords track together with the melody
• [Melody Editor] Chords track length issues fixes (when adding/removing motives)
• [Melody Editor] Crashing issue when resizing the last chord fixed
• Fixed chord rule selection from menu when magnet was 'off'
• Fixed bug when applying Mirror Vertically on a Chord Generator
  

July 19, 2021: v4.2.2

• It is possible to regenerate the shape only or the rhythm only for phrase generators
• Markov Melody Generator UI reworked
• Phrases had incorrect length when dragging from the browser (wrong signature was used)
• Fix disappearing graphics when dragging over a zoomable scroll bar
• Instrument selection in the Percussion Generator did not update the editor (bug introduced in v4.2.0)
• Stability fixes for various undo/inspector crashes
• Fix for a crash when editing the Percussion Generator in the Idea Tool
• Enable Drawing 'Line' And 'Freehand' Phrases is among experimental settings
• [Windows] Fix for a crash during text editing (e.g. when saving a progression)
• Other bug fixes

June 21, 2021: v4.2.1

• Keyboard left-right arrows move notes and phrases by 'snap' setting
• Preview implemented when moving notes with the arrow keys (note editing mode)
• Fixed: Alt/Option-click to split or join notes did not work in note editing
• States are stored for 'undo' during note editing
• New MIDI Export setting: Embed 'Program Change' events in exported MIDI
• New chord suggestion: secondary dominant for the next 'I' chord
• Fixed: VSTi instruments unloaded for 'undo' if 'Save VSTi State In History' was turned off
• Fixed: invalid control number inserted to exported MIDI for some soundfonts
• [Plug-ins] Fixed: first note of the loop sometimes did not play back in some hosts
• [Plug-ins] Fixed rare crash when right-clicking on a phrase to open the inspector during playback

June 7, 2021: v4.2.0

• Undo/redo arrows added to main composition, History tab removed
• Past 'undo' states can be stored in RAM or on disk. The default is in RAM.
• Chord rules lock have been added to all chord rules settings. When unlocked, the rule automatically changes based on the scale (default).
• Sending MIDI Machine Control events is implemented (enable under Settings / MIDI)
• New menu added when right-clicking on a master track scale/tempo/signature where scale/tempo/signature can be reviewed and edited for all levels (composition, part, line, local) 
• 'Create Tone Row' setting for chromatic progression generation (experimental setting, which must be enabled under Settings / Miscellaneous)
• Double-clicking on horizontal or vertical scrollbars zooms out the view, another double-click restores the previous view
• Vertical scrollbar has magnifiers to allow zooming
• New Idea Tool track option: 'Select Phrases From List In Random Order'
• Melody Generator UI improvements: '2nd Last Note' menu added, Tonic, Step Above Tonic, Step Below Tonic added to 'Last Note' options
• 'Render Motive With Variations' added to Melody Editor menu
• 'Change Chords According To New Scale' option added to master track scale menu (Scale Inheritance) and other places
• Editing in Percussion Generator was reworked, it is snappier and more reliable
• 'Preserve Phrase Order' option added to Phrase Container, moving phrases up/down is possible
• Improved bar position editing is used in the Timeline Inspector, and in Loop Options
• Track vertical zoom is saved with the track
• [Plug-ins] RC VST3 plug-in displays input and output channel menu in Studio One
• [Plug-ins] RC VST3 plug-in offers 128 output channels (some DAWs may not handle all 128 channels)
• [Plug-ins] Fixed preview (incoming notes sent to plug-in host)
• Memory footprint reduced, memory and resource allocations optimized (lots of changes under the hood)
• Stability improvements

April 19, 2021: v4.1.4

• Fixed: entering a melody formula crashed in the Melody Editor 'generation settings' when the chords track was not enabled
• Fixed: pop-up help did not work in Melody Editor 'generation settings'
• Fixed: wrong font sizes were used for vertical sliders on Melody Editor 'generation settings'
• Fixed occasional issues with exported MIDI length
• [macOS] Fixed crashes when opening pop-up menus

March 22, 2021: v4.1.3

• Keyboard shortcuts added: 'Mute/Unmute Selected Track', 'Solo/Unsolo Selected Track' (unassigned)
• 'Undo' and 'Redo' keyboard shortcuts added to Melody Editor
• Chord help is displayed multiple times on the master track
• Fixed: split phrases at bar boundaries did not work
• Fixed MIDI import issues when 'auto-detect phrases' was not enabled
• Fixed: Track Templates browser did not display folders initially

March 3, 2021: v4.1.2

• New size entry for phrase generators in the phrase inspector 
  
• Improved length display for phrases and rhythm patterns in the phrase inspector
• Fixed badly working "Preview Rhythm" button in the phrase inspector
• Fixed: preview in chord selector was always turned on
• Fixed: 'lock' should never be enabled for percussion phrases
• Fixed: in a percussion track the 'lock' button should not be displayed

February 22, 2021: v4.1.1

• Fixed: adding notes to a transposed phrase added the wrong notes in Note Editing mode
• Fixed: composition loaded in Note Editing mode sometimes did not display notes
• Fixes for adding notes/phrases in the composite track
• Fixed crash when 'unghosting' a phrase during playback
• Fixed phrase preview in inspector when preview with other tracks
• Fixed importing MIDI files with multiple 'note off' events for a 'note on' event
• [macOS] Fixed hanging when using the AU plug-in in Logic Pro X 10.6

February 8, 2021: v4.1

• Chords track added to Melody Editor
• 'Tonnetz' added to Chord Selector and master track chord options
• 'Parallels' tab added in the Chord Selector that lists all modes and chords
• Chord rules and chord progressions are included for Dorian, Lydian, Myxolydian, Phrygian, Aeolian modes, kindly contributed by Tomás San Miguel (not available in the demo version)
• MIDI files and folders can be dropped on the progression browser to save the chord progressions from the files
• Improved detecting and importing 'chords only' MIDI files
• New variation: Rhythm Mapper
• New option in Idea Tool track menu: Use Rhythms For 'Rhythm Mapper'
• Chords can be on 'beat' boundaries by default which is the denominator of the signature
• 'Lightning' button added to folder tracks in the Idea Tool which regenerates all tracks in the folder
• Improved 'Collect Scales For Selected Chords'
• Vector graphics is used for the buttons in the track header
• Idea Tool UI layout improved when used with big font sizes
• Using sliders in the track header updates the same slider in the track inspector
• Variations display help when the mouse is hovered on the name
• Fixed crash in Chord Selector when using bigger font sizes
• [Plug-ins] Fixed: settings were saved in the RapidComposer folder instead of RapidComposerV4
  

December 7, 2020: v4.03

• [macOS] AU MFX plug-in included
• 'Open User Guide' button added which opens the updated v4 user guide (the wiki is deprecated)
• Fixed importing MIDI CC's in MIDI files and other MIDI import fixes

November 30, 2020: v4.02

• Fixed inserting bars into the composition in the timeline inspector
• Fixed loading compositions when a VST instrument was set as preview instrument
• Small fixes in the phrase and rhythm drop targets
• Double-clicking on a 'Motive Generator' will set the instrument in the Melody Editor
• When using the 'Repeat' option in the Idea Tool, regenerating individual tracks or the master track will do the repetition
• Fixed crash when clicking on the phrase preview in Apply Shape and Apply Melody variations
• [macOS] Fixed crash on Cmd+Q on macOS Catalina

November 23, 2020: v4.01

• Phrase inspector shows timeline and note lengths for percussion phrases
• Idea Tool 'Replace Composition' mode sets composition scale, tempo and signature, instead of setting the same in the added part
• [Plug-ins] Fixed playback issues in the Melody Editor when soundfont was used
• Fixed playback in the phrase inspector when previewing phrase generators dropped in percussion tracks
• Fixed Idea Tool crashing randomly
• Fixed crash when clicking on the 'Phrase Container'

November 16, 2020: v4.0

• Redesigned user interface
• Browsers are docked on the right side, file browser added
• Melody Editor tab added for motive development, melody generation and editing
• All rhythm and phrase generators were revamped
• New rewritten VST2, VST3 and AU plugins. The plug-ins are self contained, so they do not use the main application. You can use soundfonts in the plug-in.
• The installer is improved, including installing plug-ins. The Windows installer includes 32-bit and 64-bit versions.
• Folder tracks
• Peak meters and Audio Gain slider displayed for SF2, VSTi and audio tracks
• Settings / VSTi page reworked and simplified
• New structure inspector with extended functionality
• Diatonic and chromatic mediant chords are in the Chords Suggestions
• The initial 'enter license key' screen redesigned with the possibility to start the demo version
• New variation: 'Apply Shape'. It is similar to Apply Melody but uses the new rhythm mapping
• Add selected chords to a progression rule (from the master track, the progression editor, and the browser)
• Additional bigger font sizes offered, suitable for 4K resolution
• At the first usage font size is automatically set based on the screen resolution
• Supporting special characters in directory names (cyrillic, kanji, etc)
• Color themes updated and cleaned up. New color themes: 'Dark With Orange', 'Katalin Dark'
• Dozens of other improvements and bug fixes that are impossible to list