EarSprint
A short listening game with original generated tones, deterministic challenges and a clear record of your answers. Try five familiar intervals or the full chromatic set, practice missed intervals and tap back a rhythm at its original tempo.
How we build a check
This workbench processes supported inputs locally. We test calculations, file structure and generated artifacts using independent readers or known fixtures where available. The example runs the same processing path as a supplied input; it does not stand in for checking your own result.
Editorial responsibility
KitForma maintains this tool and its guides. The source notes on the tool page link to the supporting documentation. We do not claim affiliation with the referenced hardware manufacturers or platforms. Review date: 2026-10-19.
Limits and updates
Generated equal-tempered sine tones only, from a bounded MIDI register. No microphone, hearing test, instrument transcription, perfect-pitch assessment or guaranteed musical improvement.,Rhythm score compares inter-tap gaps after first-tap alignment; it does not measure or calibrate hardware output latency. Browser/device jitter and input method affect results. Two generated five-tap patterns at 100 BPM per challenge.,Local session only; no live multiplayer room, leaderboard or automatic storage. Save JSON/CSV explicitly. Previous records up to 200 KB are validated and compared only when code, level and direction match. If a specification changes or a result appears incorrect, send the relevant source URL and a non-sensitive reproduction to kitforma@outlook.com.
Open-source components
The tools use self-hosted open-source components appropriate to each format, including PDF.js, pdf-lib, fflate, SheetJS, MediaInfo by MediaArea.net SARL and others. Component versions and licenses. MediaInfo license · fflate license.