Thynthe Composer
A music maker for Synthedius2 / Syntheworld stages that runs in your phone's browser. Completely free, no account needed.
Made for phones and tablets (desktop browsers work too). Your songs are saved automatically on your device.
Features
- Sequencer: 1/2/4 bars × 16 steps, up to 30 rows. Tap or swipe to enter notes; per-row piano roll for pitch and chords
- Patch editor: VCO / VCF / envelopes / per-patch effects and 44 presets, with the same knobs as the games
- Sampler: record from the mic, load audio files, trim
- Song settings: BPM, key, scale, chord progression, enemy budget
- Autosave, undo/redo and a song library. Starts offline once opened
Bring it into the game
Menu → "Share / download zip" exports a .zip. Send it to your PC and load it with "Import .zip" in the Synthedius2 / Syntheworld level editor. Songs exported with the game's "Export .zip" open here too.
Tips
- On iPhone / iPad, use Safari's Share button → "Add to Home Screen" to run it full screen as an app (the Home Screen app and Safari keep separate songs).
- No sound? Turn off silent mode and tap the screen once.
- Songs are stored only in this device's browser and never sent to a server. Export important songs as a zip.