Cello Colors - Try the Alpha

Why Cello Colors?

Cello Colors offers an effortless way to play your instrument alongside real music.

Play Easy
You don't need to read sheet music to start playing. But if you're curious, the app helps you naturally pick it up along the way.
Play Anywhere
Runs right in your web browser. Works seamlessly on your computer, tablet, or phone.
Be Creative
Use the built-in editor to create new practice pieces, or open and personalize existing ones.

	Public alpha
Player	Included.
Editor	Included.
Open and save	Load and save projects to your device.
Cloud sync	20 slots to keep your favorite projects ready anywhere.
Audio enhacements and effects	High-quality speed change and loudness effects.
No Ads	Ad-free experience so you can stay focused.
Tutorials and demos	Learn the basics of playing the cello and try playing some pieces.
No queues	❌ Some queues at peak times.
Offline solutions	🚧 PDF and audio export options, to practice without the app.

Editor / Bugfix. The original background image was lost when replacing a project's audio.
Editor / Feature. Minor UX improvements.
Home / Feature. Improved UX for small screens.
Load / Feature. Enabled tutorials and demos (built-in project repository).
Load / Feature. Added a loading screen to show progress, status, and errors.
Player / Bugfix. No sound when playing a second project (after completing the previous one).
Player / Bugfix. Sharp '#' symbol is now rendered correctly in all nomenclatures.
Player / Bugfix. Incorrect score position on short-height screens (e.g., landscape phones).
Player / Bugfix. Incorrect initial score size on short-height screens (e.g., landscape phones).
Player / Feature. Added 'None' nomenclature option.
Save / Bugfix. Replacing a project slot in "My Projects" now refreshes the list.
Save / Feature. Increased available cloud slots from 20 to 50.

App / Feature. Tuner screen.
Editor / Bugfix. Disable the native browser context menu triggered by long-press gestures on mobile devices.
Editor / Bugfix. Reduced audio latency the first time a note sample is played (first-use asset loading latency).
Editor / Bugfix. Piano sounds stopped working at some point when editing scores on Android devices.
Editor / Bugfix. Refresh the play/pause button when audio ends.
Editor / Bugfix. Using the web browser back button now stops audio playback.
Editor / Feature. Improved UX for note resizing, movement, deletion, and the time marker. Also adds a zoom option.
Load / Feature. Improved support for small screens (phones).
Player / Bugfix. Score image sometimes cut off before the last note.
Player / Bugfix. Seeking display time was incorrect when the playback speed was different from 100%.
Player / Bugfix. Fixed a black screen issue on large scores (WebGL max_texture_size).
Player / Bugfix. Stereo signal was lost on some processed audio.
Player / Bugfix. Using the web browser back button now stops audio playback.
Player / Feature. Improved support for small screens (phones).
Player / Feature. Higher contrast.
Player / Feature. Show the project description before starting.

App / Feature. Disable player and save screens while the score is empty.
App / Feature. Replaced default app title and icon.
App / Feature. Show a timeout count-down on project and audio uploading.
App / Feature. Support for any screen orientation when running as a PWA (Progressive Web App).
Editor / Bugfix. Moving a note to a negative position is no longer allowed.
Load / Feature. My projects (cloud save slots).
Player / Feature. Audio enhacements and effects selector.
Player / Feature. Loop option.
Player / Feature. Player starts at -8 seconds, to give time to get comfortable before the piece starts.
Player / Feature. Score nomenclature selector.
Player / Feature. Start from the begining option.
Player / Feature. Zoom and time seek gesture UI helpers.
Save / Bugfix. Android will no longer rename downloaded projects to a .ccp.txt extension. Projects are now served inside a zip file.
Save / Bugfix. Fixes error when downloading a project for the first time (due to async score uploads).
Save / Feature. My projects (cloud save slots).
Server / Feature. Added a pre-production environment (pre.cellocolors.com) for testing the next release.
Server / Feature. Uploading projects requires less storage on server.