ComposerDeck is built by a tiny independent crew of working musicians in France, with cards and takes contributed by the musicians who use it. It's the daily creative-constraint engine we wished existed: a deck of cards that gets you composing in 90 seconds, not generating in 9.
Challenge yourself · Inspire others.
ComposerDeck started as a personal fix for a familiar wall: open the DAW, stare at the empty session, scroll, close the DAW. Lester D., a French producer and developer, kept losing sessions to the blank page.
Inspired by Brian Eno's Oblique Strategies and classic constraint-based composition exercises, he turned the fix into a deck of cards. Pick one chord, one mode, one instrument, one rule you can't break. Set a timer. Compose.
It worked well enough that it deserved to exist properly: as an app, in the open, shared with anyone who fights the same wall. The first public version shipped in June 2025 and it has been evolving ever since.
A blank canvas is the enemy. Three random cards is the friend. Pick a chord, accept the brief, ship the sketch.
We will never generate music for you. AI music tools are not our competitors: they're our anti-mission. The hand that writes is yours.
90 minutes a day for 30 days beats one 45-hour weekend. We optimize for streaks, not masterpieces.
Daily draws, profile, submissions, blog: free. Always. Pro funds the work and unlocks the depth, but the daily practice is non-negotiably free.
Every card is hand-written by a working musician, many proposed by the community and reviewed one by one. No prompts, no AI fluff.
Logic, Ableton, FL, Bitwig, Reaper, paper, voice memos: we don't care what you compose with. We just hand you the brief.
Small by choice. We compose, we ship, we read every message.
Producer and developer. Writes the cards, builds the web and iOS apps, edits the journal, and reads every message.
Sound engineer, composer and multi-instrumentalist at MarkH Audio. Puts every release through its paces in real sessions and contributes cards to the deck.
Musicians propose new cards, build and share public decks, and ship real tracks to the feed. Every contribution is reviewed by hand before it joins the deck.
A young, growing community whose work is live for everyone: the feed, the deck library, the leaderboard. And underneath it, the foundations we're proud of:
Pull your first cards. The daily streak starts the moment you draw.