Useful now
Relative early/late tendency, evenness, missed hits, extra transients, and change across eight bars.
JamLab / Tool 01
JamCheck
Eight bars. One click. Clearer timing.
Play a simple rhythm through a microphone or audio interface and see where your notes land. No pitch judgment, no account, and no uploaded audio.
Timing only
4/4 guided click
Local analysis
Browser tool
Run a timing check
- 01Intro
- 02Setup
- 03Input
- 04Practice
- 05Results
CHECK / READY
Measure rhythm before chasing note recognition.
JamCheck compares your note onsets with a fixed musical grid and reports placement, consistency, drift, missed hits, and extra hits.
- Length
- 1-bar count-in + 8 bars
- Pattern
- Quarter or eighth notes
- Input
- Mic, interface, or tap
- Output
- Private result + PNG Jam Card
CHECK / INPUT
Calibrate your input.
Use headphones so the metronome does not become part of the measurement.
Headphones requiredSpeaker playback will look like instrument hits.
Microphone access is off
0 / 8
Nothing is captured until you choose Enable microphone.
Tap mode is ready.
During the take, press Space or Enter, or use the large on-screen pad for each note.
Count in
— / 8 bars
Get ready. The take starts after four clicks.
—Timing score
CHECK / RESULT
Timing check complete.
Your next practice target will appear here.
- Tendency
- —
- Consistency
- —
- Drift
- —
- Best bar
- —
- Matched hits
- —
Early
Late
Timing measurements can include browser and device latency. Compare trends using the same setup.
Current limits
What JamCheck can—and cannot—tell you.
Setup matters
Use headphones and a clean signal. Device latency affects absolute millisecond readings, so compare sessions on the same setup.
Not listening for notes
JamCheck does not identify pitches, chords, scales, dynamics, or musical quality. It only measures timing events.