LIBSONARE
Piano PracticeFalling notes · built-in piano engine
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OSS DEMO

Everything runs locally on your device and nothing is sent anywhere. This is an open-source demo, not a service.

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Music: Goldberg Variations (BWV 988), public-domain transcription. Piano: libsonare built-in synth, or a public-domain SoundFont.
How it works

The roll, strike line, and audio share one clock, so the lit keys match what you hear. Slow a passage down to learn it without changing pitch, then switch on game mode and connect a MIDI keyboard to be scored on your timing.

SoundFont player
PLAY · LEARN

Watch the notes fall, follow the keys

libsonare's built-in engine renders the score to audio on-device — nothing uploaded. Slow any passage down without changing pitch, and switch between the synthesized and sampled piano on the fly.

Preparing the piano…Rendering this movement on-device — no upload.
Movement
Web MIDI is not available in this browser
Speed
Sound
Piece
J.S. Bach · Goldberg Variations · BWV 988 · Aria
Notes
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Length
0:00
Range
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Tempo
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