Jazz pianist line art
Jazz Chord Voicing Trainer

Learn 1,320 jazz voicings.
One chord at a time.

Real sheet music. Real voicings. 28 chord types across all 12 keys with inversions — study visually or connect a MIDI keyboard for hands-on practice with instant feedback.

Download Free Upgrade — $14.99
BeingJAZZER app screenshot
THE PROBLEM

Piano lessons teach you to play.
Not to understand what you're playing.

✕
You learn a song, but can't play anything else. Without the sheet music in front of you, your hands don't know where to go.
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You see notes on a staff but don't know what chord it is. So you play note-by-note instead of thinking in harmony.
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You want to compose or improvise, but you can't voice chords from memory. You know the name "Cmaj7" but your fingers don't.
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Lessons cost money and time. YouTube tutorials show you one song at a time. Nothing builds the core skill: seeing a chord, playing it instantly.
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You take lessons, but reading sheet music is the real bottleneck. Half the lesson is spent decoding notes instead of actually playing. Your practice time burns away before your fingers even start learning.
↓

The fix is simple:
See it. Learn it. Play it.

BeingJAZZER shows you every jazz chord voicing on a real grand staff — exactly how it appears in sheet music. Study the voicings visually, or plug in a MIDI keyboard to practice hands-on with instant feedback. Either way, you're building the skill that matters most: reading and playing jazz harmony on sight.

Real grand staff

Right hand voicing on treble clef, left hand root on bass clef. Exactly how you'll see it in lead sheets and scores.

MIDI keyboard support

Optional but powerful — connect a MIDI keyboard to practice hands-on. See what you play on a separate staff in real-time.

Instant feedback

Check mode tells you right or wrong immediately. Correct? Auto-advance to the next chord. Wrong? Try again.

Jazz progressions

ii-V-I, ii-V-I-VI, I-VI-ii-V — practice the patterns that actually matter. Random keys to build fluency everywhere.

Metronome

Set a tempo. Chords change on the downbeat. Builds the time pressure that makes practice stick.

28 chord types × 12 keys

Maj7, min7, dom7, dim, aug, 9ths, 11ths, 13ths, altered — with root, 1st, 2nd, and 3rd inversions. 1,320 combinations.

How it works

1

A chord appears on the staff

Random or from a progression. You see the notes — root in bass clef, voicing in treble clef, with key signature.

2

Study it or play it

Learn the voicing visually from the staff. Got a MIDI keyboard? Plug it in and your notes appear in real-time below.

3

Feedback is instant

In check mode: green for correct, red for try again. With the metronome: chords auto-advance on beat so you keep moving.

4

Muscle memory builds

After days and weeks, you stop thinking. You see a chord on any score and your fingers just know. That's the goal.

Download BeingJAZZER

Free version includes C key + Maj7 chord. Upgrade to unlock all 1,320 voicings.

Free
No account needed · C key + Maj7 chord
↓ Download for Mac ↓ Download for Windows
Mac: macOS 12+ · Apple Silicon  |  Windows: Windows 10+ · x64

Unlock everything.

Free version: C + Maj7 only. Full version: 28 chord types × 12 keys × inversions.

$14.99
One-time payment · Lifetime updates
System Requirements
Mac: macOS 12 (Monterey) or later · Apple Silicon
Windows: Windows 10 or later · x64
MIDI keyboard (USB, audio interface, or Bluetooth)
✓ 28 chord types with all inversions
✓ MIDI keyboard support
✓ 4 jazz progression modes
✓ Built-in metronome
✓ macOS & Windows
✓ EN / JA / ZH
✓ Dark & light mode
Already have a key? Enter it in the app.