A♭ Major Scale

Scale steps
W = 2 semitones H = 1 semitone
A2WB2WC1HD2WE2WF2WG1HA
Step Pattern: W–W–H–W–W–W–H (2–2–1–2–2–2–1 semitones)
On the keyboard
CFGCFGCDEABDEAB

Diatonic triads

Degree
Build the chord · root–3rd–5th

ROOTTAKESKIP

Chord semitone gaps
Ukulele G-C-E-A
I
ABCDE
A major

A · C · E

4 + 3 semitones
AEAC
1243
1343
AExC
123
13x3 · ALT
ii
BCDEF
Bm minor

B · D · F

3 + 4 semitones
BDFB
4123
3111
BDFD
3124
3114 · ALT
iii
CDEFG
Cm minor

C · E · G

3 + 4 semitones
GEGC
123
0333
GExC
12
03x3 · ALT
IV
DEFGA
D major

D · F · A

4 + 3 semitones
ADFD
1234
1114
ADFx
123
111x · ALT
V
EFGAB
E major

E · G · B

4 + 3 semitones
GEGB
231
0331
BEGB
2341
3331 · ALT
vi
FGABC
Fm minor

F · A · C

3 + 4 semitones
ACFC
123
1013
ACFx
12
101x · ALT
vii°
GABCD
Gdim diminished

G · B · D

3 + 3 semitones
GDGB
132
0131
BDGB
3142
3131 · ALT