Rep-Scoring Metronome

Rep-Scoring Metronome is a metronome that listens. Arm the click, play the passage, and within a second it returns the verdict: your mean offset in milliseconds, your timing spread, every missed or extra onset, and a per-metrical-position bias map — for example that you are +34 ms on the and-of-3 in 14 of 16 bars. Input can be the microphone (spectral-flux onset detection, with instrument presets for drum, piano, guitar, strings or voice) or a MIDI device for exact note-on timing. A device calibration offset is measured with a speaker loopback or set by hand and is printed beside every verdict; if the click bleeds into the microphone the app refuses to score until the count-in is clean, so the numbers stay trustworthy. The tempo ladder is arithmetic over measured reps, not vibes: three consecutive clean repetitions (|mean| within 25 ms, spread within 18 ms, at least 80% of expected onsets detected) raise the click by 4 BPM, and any fail drops it 6 BPM to be re-earned. The ledger keeps your passages with the exact BPM each one actually passed at, flagging passages that have gone stale. Everything persists: kept in the browser for anonymous visitors and synced to your VibePlat account when signed in. The interface follows the viewer's locale in English, Chinese, Japanese and Spanish, and the keyboard runs the session (space to arm and stop, Escape to stop).