
12 Bar Blues Chords & Scales for Guitar
The 12 bar blues is a 12 bar long chord progression that solo blues musicians can easily improvise over the top of
because the chord progression is familiar to them. This chord progression is based around the most important chords
in a key I, IV & V (1, 4 & 5) and is repeated over and over for the duration of the piece. It is usually in 4/4 (4 crotchet
beats per bar) and uses 1 chord per bar with 12 bars in total - thus the 12 bar blues.
The 12 bar blues progression is as follows:
It is very common in blues music to add 7ths to the major chords giving that classic blues sound. These are
constructed of a major triad (as in the table below) and then adding a minor 7th on the top (10 semitones above the
root forming dominant 7th chords). For example in C Major this would be:
Chord I C E G Bb
Chord IV F A C Eb
Chord V G B D F
Try playing the 12 bar blues progression in C with just the major triads:
4
4
&
&
&
VVVV V VVV VVVV VVVV
VVVV VVVV VVVV VVVV
VVVV VVVV VVVV VVVV
&
VVVV V VVV VVVV VVVV
VVVV VVVV VVVV VVVV
VVVV VVVV VVVV VVVV
VVVV V VVV VVVV VVVV
VVVV VVVV VVVV VVVV
VVVV VVVV VVVV VVVV
Now try playing it in the same key, but with the 7th chords so that you can hear the difference:
4
4
&
&
&
VVVV V VVV VVVV VVVV
VVVV VVVV VVVV VVVV
VVVV VVVV VVVV VVVV
&
VVVV V VVV VVVV VVVV
VVVV VVVV VVVV VVVV
VVVV VVVV VVVV VVVV
VVVV V VVV VVVV VVVV
VVVV VVVV VVVV VVVV
VVVV VVVV VVVV VVVV
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