MIDI Monitor
Real-time diagnostic for any MIDI input. Inspect raw bytes, notes, velocity, controllers, pitch bend, and per-channel activity as you play.
Device
0 inputsNo MIDI inputs detected. Connect a device and click Retry above.
Statistics
0:00Note
no keys heldPlay a note to see its data.
Velocity
—Active Keys
A0 — C8Grand Staff
20s history · scrolls leftPitch Bend
centerSustain
CC64Control Change
0 activeNo CC messages yet.
Channel Activity
1 — 16Related Tools
Chord Builder
Animated, step-by-step triad construction — count semitones to build major, minor, diminished, and augmented chords.
MIDI Gear Guide
USB keyboards and cables that work with piano.org. Browser compatibility, setup, and picks for every budget.
Practice Room
Live MIDI practice — chord drills, scale runs, and free play with real-time analytics.
Chord Finder
Click piano keys or play MIDI to identify any chord, including inversions and voicing boxes.
Chord Drill
Timed chord recognition drills with real-time MIDI matching.
Circle of Fifths
Interactive key relationships, scales, and staff notation.
Key Signature Quiz
Identify keys from their signatures — tap the root, play it on MIDI, or sing into the mic.
Scale Drill
Build scale fluency with structured tempo graduation across all 18 keys.
Interval Trainer
Train interval recognition by ear and theory — identify intervals by sound or name.
Note Reading
Practice reading notes on the treble and bass staff. Tap or play to answer.
MIDI Latency Calibration
Measure and save your MIDI round-trip latency for accurate timing at fast tempos.
Skill Diagnostic
Quick placement assessment — maps your strengths and recommends a starting level.