Flat

Write, hear and share a score from the same workspace

Flat is a music notation platform for composing, editing and publishing sheet music in a web browser, with companion apps for desktop and mobile. Its main advantage is keeping the score itself at the center of the workflow: notes can be entered and edited on a staff, played back with instrument sounds, arranged into a finished layout and shared with other musicians. That makes it useful for composers, students, teachers and ensembles who need to move between drafting, feedback and a readable part or score without passing files back and forth.

Notation tools for different instruments and formats

The editor covers standard notation and guitar tablature. Flat also lists PDF import, which can help bring an existing printed or digital score into the workspace for editing. The instrument library includes common orchestral and band parts, piano, guitar, drums and other sounds; advanced plans add a wider set of high-quality and custom instruments. For a musician arranging an ensemble, being able to hear parts during drafting can make it easier to check entrances, balance and the overall shape of a passage before sharing it.

Flat’s published product details describe support for more than 180 instruments, including over 90 high-quality instruments. Playback controls include separate part volumes and reverb on the advanced plan. The service also supports YouTube, SoundCloud and MP3 audio uploads for use alongside a score. These are composition and practice tools: they do not replace a performer’s interpretation or a teacher’s feedback.

Collaborate live and publish interactive music

Collaborators can be invited to the same score to write, edit and comment in real time from different devices. This suits lessons, group assignments, co-writing and arranging sessions where several people need to work from a shared version. Flat’s community lets members publish compositions, browse user-created scores and share work for feedback. The platform also offers interactive sheet-music embeds, allowing a score to be placed on an external teaching or musician website.

For schools and districts, Flat for Education is a separate product focused on classroom composition and collaboration. It is worth comparing that education edition with the standard Flat account before choosing: the intended users, classroom management and plan terms are different.

Choose a plan around score limits and workflow

A free tier includes essential notation, playback and real-time collaboration, with a limit of 15 scores. Flat Power removes that score limit and adds features such as custom layouts and templates, advanced playback, expanded instrument choices, offline composing with later synchronization, and export options. A free download of Flat Desktop is also advertised for Mac and Windows. Review the current plan page for exact export formats, storage limits and pricing before moving a large library of work into the service.

Learning resources and ways to explore

New users can start in the browser, then use product guides, video tutorials, help pages and product updates to learn note entry, score layout and collaboration. The blog covers composition, music theory and promotion. A community challenge provides a prompt for creating and sharing a piece, while the score library offers examples to browse by instrument and popularity. These resources make Flat useful both as a notation tool and as a place to discover how other musicians arrange ideas.

Flat’s official pages currently describe browser access alongside iOS, Android, Mac and Windows apps. An internet connection is needed for the web product; the desktop app can continue working offline and sync changes after reconnecting. The official site links to its help center and customer support for product questions.