WhatChord MIDI

Real-time chord recognition for Bluetooth and USB MIDI keyboards, plus Explore modes for learning chords and scales even when your keyboard is not connected.

Stop guessing what chord you're playing.

WhatChord listens to your MIDI keyboard and identifies chords instantly, helping you learn progressions, check voicings, understand harmony, and name what you're hearing. When you're away from your instrument, Explore modes let you build and hear chords, browse a wide range of scales, inspect keyboard patterns, and see the diatonic chords that belong to a scale.

Play. Learn. Explore.

WhatChord goes beyond simple note matching. Its musically informed analysis considers inversions, extensions, slash chords, altered tones, harmonic context, and conventional naming practices so chord names appear the way musicians expect to see them.

FEATURES

• Real-time chord recognition
  Chord names update immediately as you play.

• Explore chords
  Tap the chord card to open explore mode and build or hear chords without a keyboard by adjusting the root, quality, extensions, and bass note.

• Explore scales Tap the scale-degree strip to browse a wide range of scales with tones, keyboard patterns, and diatonic chords.

• Musically informed analysis
  Recognizes inversions, extensions, slash chords, upper structures, altered tones, and complex harmony.

• Alternative interpretations
  See other valid chord names when more than one reading makes musical sense.

• Context-aware spelling
  Uses enharmonic notation based on key signature and chord function.

• Customizable notation
  Choose the chord symbol style you prefer.

• MIDI compatibility
  Works with standard Bluetooth MIDI and USB MIDI keyboards and controllers.

RECOGNITION

WhatChord identifies everything from simple triads to rich extended harmony. Whether you're practicing theory, learning progressions, exploring altered dominants, or working through dense extended chords, the app names what you play with accuracy and musical intent.

PRIVACY

WhatChord is free, contains no ads, and collects no personal data. All analysis happens locally on your device.

GET STARTED

Connect a Bluetooth or USB MIDI keyboard for live recognition, or open an Explore mode and start building chords and scales right away.