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Dynamic articulation engine 180+ studio-sampled instruments for every genre High-resolution audio export 
Realistic Sheet Music Playback
Hear your score come to life
Studio-sampled instruments, realistic dynamics, and professional playback — all inside your browser, on desktop and mobile.
HOW IT WORKS
Professional playback in three steps
Write with expression
Add dynamics (pp to ff), slurs, and articulations. Our engine interprets them instantly.
Experience pro audio
Hit play to hear realistic velocity layers and sampled resonances that capture a live performance.
Every marking, heard exactly as written
Our playback automatically handles staccato, pizzicato, and vibrato with professional precision.
From grand piano to expressive strings
Access a comprehensive library recorded by top-tier session musicians in world-class studios.
From score to studio-ready file
Export your compositions as MusicXML, MIDI, WAV, or MP3 files to share your work with professional clarity.
A complete library of notation instruments
Orchestral strings
Solo and ensemble violin, viola, cello, and double bass with multiple articulations.
Woodwinds & brass
From delicate flutes to powerful orchestral trumpets and cinematic horns.
Modern rhythm
Studio drum kits, percussion, and hybrid rhythmic elements for contemporary compositions.
World & keys
Grand pianos, electric organs, and rare instruments from across the globe.
HQ instruments for realistic playback
Grand Piano HQ
High-quality sound
Drums
High-quality sound
Violin HQ
High-quality sound
Guitar
High-quality sound
Trumpet
High-quality sound
Frequently asked questions
Do I need to download a sound library?
Can I use these instruments for commercial projects?
What makes Flat's notation playback realistic?
Can I export the audio files?
Can I customise the mix of my notation instruments?
Does sheet music playback work on desktop and mobile?
Discover music composed in Flat
Browse 300,000+ original scores and arrangements — and hear them come to life with realistic playback.
Start browsing6M+ musicians worldwide
From students to professional composers, musicians all around the globe use Flat to write, collaborate, and share their music.