Designed from the ground up for music composition.
Used by thousands of composers since 2010.
RapidComposer is an innovative, phrase-based music composition tool, offering a flexible, non-destructive workflow tailored for composers, songwriters, and musicians of all genres. RapidComposer makes it easy to turn your musical ideas into reality.
Latest News:
February 9, 2026: RapidComposer v6.0.7 released
November 15, 2025: 41 Realtime posted new videos about "Live mode" and other tutorials: Live mode 1 - 2 - 3, Tutorial 1 - 2 - 3 - 4 - 5
October 8, 2025: RapidComposer 6 released! See what’s new in this version.
April, 2025: RapidComposer 15th Anniversary!
Upgrade to version 6 with a discount! Read upgrade info
Effortlessly craft rich chord progressions and utilize piano-style phrases, even without prior piano experience. Auto-harmonize melodies, receive chord suggestions, and load MIDI files with built-in chord detection. With tools like the chord palette and the Circle of Fifths chart, RapidComposer provides constant support to enhance your songwriting process.
Phrases automatically adapt to the current chord and scale on the master track, eliminating the need to adjust individual notes. Simply lay out chords on the master track or drop in a chord progression, and with a single keystroke, generate a harmony track with flawless voice leading. Start composing with ease today!
Included rhythm and phrase generators allow for creating a wide range of patterns, both monophonic and polyphonic. Generate melodies, apply variations to modify phrases non-destructively, and easily slice or adjust the rhythm of existing phrases.
Leverage an intelligent algorithm to generate optimal guitar chord fingerings based on your specific constraints. Easily edit fingerings directly on the fretboard. Convert tracks into editable guitar tablature with calculated, optimized fingerings. Export tabs seamlessly in MusicXML format for further use.
Suggestions by harmonic rules, borrowed chords, chord substitutions, pivot chords, diatonic and chromatic mediant chords, passing chords, bass and melody pedal tone chords, chords on scale, chord builder, chord voicing editor. With these tools, you'll always have guidance for selecting the perfect chords.
RapidComposer provides multiple methods for selecting chords for the master track or progressions, including the Tonnetz and Circle of Fifths. Chord buttons can be color-coded by consonance, common tones, tonality, or suggestions. Customize chord rules for progressions and apply chord voicings to individual tracks, phrases, or the master track.
With it, you can instantly create new multi-track compositions or phrases, or even let the engine continue an existing melody or arrangement. It’s a powerful way to spark creativity and explore new musical ideas inside RapidComposer.
* Full Edition only
Trigger and perform sections of your composition from a MIDI keyboard in real time, with per-track speed, transpose, and timing controls. Mouse triggering also supported. With LIVE Playback Mode in RapidComposer 6, your compositions are no longer static: they become expressive, playable instruments.
* Full Edition only
The AI assistant, available in both full and light editions, offers intelligent suggestions for chord replacements, progressions, rules, and even song structure based on the genre or mood you specify. Powered by AI models from multiple providers, this feature requires an API key from a supported service.
RapidComposer generates multi-track compositions with chords based on your settings and phrases, supporting a variety of workflows. It's designed to inspire creativity, even when you're not short on ideas.
* Full Edition only
Melodya is a motive generator and editor, which was integrated into RapidComposer as a Melody Editor tab. By enabling the chords track, you can create a melody for a given chord progression, so two entirely different workflows are supported.
* Full Edition only
The extensive libraries for chords, scales, and chord progressions are fully expandable. Use the docked browsers to search, preview, sort, group, and display items. Additionally, a file browser and a CC envelope browser have been included for enhanced navigation.
For 12-year-old Colette, watching from her sofa in Chicago, the words were just history. But for the characters on screen—Ernest and Colette (the other Colette, the French one)—it was the last day of innocence.
The Radio in the Apple Tree
The summer turned long and dark. German soldiers arrived in gray-green uniforms. The subtitles grew heavier, carrying the weight of fear. One scene showed Ernest’s grandmother hiding a British pilot in the hayloft. The pilot spoke English, and for a moment, no subtitles were needed for Colette (the viewer) to understand. He whispered, “Thank you. I need to get to the coast.” But the French characters replied in subtitles: “We will hide you. Even if it costs us everything.”
As the credits rolled, the viewer understood. The subtitles of Les Grandes Grandes Vacances did more than explain French. They built a bridge across time, reminding every English-speaking child that war is never a holiday—but that friendship, and a single green apple, can still be a kind of resistance. les grandes grandes vacances english subtitles
The story moved gently at first. The English subtitles captured the soft clucking of chickens, the thud of apples falling, and the crackle of a hidden radio. That radio became their secret. When the adults whispered about “the Boche” and “mobilization,” the children didn’t understand. But the subtitles always translated the adults’ hushed French: “The Germans have crossed the border.” “We are not ready.”
Ernest, a bespectacled boy from Paris, had just been dropped at his grandmother’s farm in the countryside. The subtitles translated his grumpy whisper: “Two months without electricity? I’ll die of boredom.”
Colette picked an apple, green and small. She bit into it. “We live,” the subtitle read. “Properly this time.” For 12-year-old Colette, watching from her sofa in
His new friend, the local girl Colette, rolled her eyes. The subtitle popped up: “You Parisians. Life is outside, not in a plug.”
But his sister, Colette, snatched it off his head. Her face was streaked with tears. The subtitle appeared slowly, word by word: “No. You will never be one of them. You will be a boy who plants apple trees.”
That line, translated perfectly from the French « Tu seras un garçon qui plante des pommiers » , made the Colette in Chicago press pause. She realized the subtitles weren’t just translating words. They were translating a world where children learned to be brave, to share a single piece of chocolate for a week, and to understand that “les grandes grandes vacances”—the long, long holiday—was a name they gave to the war to make it sound less like a nightmare. German soldiers arrived in gray-green uniforms
Les Grandes Grandes Vacances (English subtitles: The Long, Long Holiday )
The screen flickered to life, and the English subtitles rolled up in clean, white text: "Normandy, France. August 30, 1939."
The most powerful moment came when little Jean, only five, found a discarded German helmet in the woods. He put it on and ran to his sister, laughing. The subtitle read: “Look! I’m a soldier!”
When she unpaused, the final scene unfolded. The war was over. Ernest and Colette, now teenagers, stood by the old apple tree. The radio, long silent, sat rusting in the branches. Ernest looked at Colette. The subtitle said: “What do we do now?”
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