EP
CHORD LAB
v2.1 Enhanced
READY
PROGRESSION BROWSER 0 LOADED
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Custom Progression
Click to load J-6 sets
PAD DISPLAY
Use your keyboard numpad to play pads
PAD LABELS
NOW PLAYING
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Select a progression to begin
Root
3rd
5th
7th
PLAYBACK CONTROLS
TEMPO 120 BPM
BEATS / CHORD (DEFAULT) 1
KEY
SCALE
Pad mapping supports 7-note scales only.
KEY
—
SCALE
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OCTAVE
SYNTHESIS
ENVELOPE
ARPEGGIATION
CHORD INFO
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Select a progression and chord to see details.
Scale Formulas (W = Whole, H = Half)
Major: W-W-H-W-W-W-H
Natural Minor: W-H-W-W-H-W-W
Harmonic Minor: W-H-W-W-H-W+H-H
Dorian: W-H-W-W-W-H-W
Mixolydian: W-W-H-W-W-H-W
Circle of Fifths (Major / Relative Minor)
C G D A E B F# C# G# D# A# F Am Em Bm F#m C#m G#m D#m A#m Fm Cm Gm Dm
Clockwise adds sharps, counterclockwise adds flats. Neighboring keys often sound good together.
Chord Types
Major: Root + M3 (4 semitones) + P5 (7 semitones)
Minor: Root + m3 (3 semitones) + P5 (7 semitones)
Diminished: Root + m3 + d5 (6 semitones)
Sus2: Root + M2 (2 semitones) + P5
Sus4: Root + P4 (5 semitones) + P5
7th (in-scale): Adds the 7th scale degree.
Inversions
Root: 1-3-5 (Bass is root)
1st Inv: 3-5-1 (Bass is 3rd)
2nd Inv: 5-1-3 (Bass is 5th)
Notation Examples
Separator: I - V - vi - IV (spaces or hyphens)
Major: I or 1
Minor: vi or 6m
Flat degrees: bVII, bVI, bIII
Diminished (ASCII): viidim or viio
Borrowed chords: Chords from the parallel key (like bVII or iv) add color outside the key.
1st inversion: I/1 or 1/1
2nd inversion: I/2 or 1/2
Sus2: Isus2 or 1sus2
Sus4: Isus4 or 1sus4
7th (in-scale): V7 or 57 (maj7 accepted)
Credits: J-6 chord sets from the Roland J-6 manual. Manual Common progressions from Hooktheory. Hooktheory