Here we have a I-IV-V 12-bar blues shuffle feel featuring all 7th chords. Dominant 7th chords are very common in the blues. Remember that the formula for a 7th chord is 1,3,5,b7. It has the b7 or dominant 7th in it, very important for blues. Again you should hear that identifiable 12 bar I-IV-V pattern that alerts you to a wide-open jam. As well as soon as you hear 7th chords consider using Mixolydian mode over each chord.
What Relates to all the chords:
Remember that with major key I-IV-V blues, swings, and shuffles you can usually use Minor Pentatonic, Major Pentatonic, and The Dorian Mode over all the chords. These types of blues jam are wide open for many possible soloing opportunities. It just depends on what type of sounds you prefer or what you want to get across, minor bluesy or sweet major or both.
Try A Minor Pentatonic & Blues over all the chords for that minor bluesy vibe.
A Minor Pentatonic & Blues – A, C, D, Eb, E, G
Try A Major Pentatonic over all the chords for that sweet major sound. A Major Pentatonic is the same as F# Minor Pentatonic, major and relative minor:
A Major Pentatonic – A, B, C#, E, F#
F# Minor Pentatonic – F#, A, B, C#, E
(Same notes – just emphasize the root of the mode, A.)
Play all your F# Minor Pentatonic scales, but start on and emphasize the A notes and it will be A Major Pentatonic and will exude that sweet major sound.
Try A Dorian over all the chords. Dorian works great over major key I-IV-V blues, swings, and shuffles.
The Dorian Mode is a seven-note scale often used in blues, rock, and many other musical genres. Dorian is considered a minor mode and is always the 2nd mode in any major key. Dorian produces a mystical, minor sound that is a bit sweeter than Aeolian. There is only one note difference between Dorian and Aeolian – the 6th interval:
Dorian Mode = 1, 2, b3, 4, 5, 6, b7
Aeolian Mode = 1, 2, b3, 4, 5, b6, b7
Remember that Dorian is the second mode in any major key. So to play A Dorian ask what major scales 2nd note is an A note. The answer is G. G major has the same notes as A Dorian. So play G major scales but start on and emphasize the A notes and you have A Dorian. If you want to learn more about modal playing and Dorian please see the written lessons in this series.
A Dorian is the same as G major, (A Dorian=G major).
A Dorian = A, B, C, D, E, F#, G
G Major = G, A, B, C, D, E, F#
(Same notes – just emphasize the root of the mode, A.)
So play all your G major scales but emphasize and start on the A notes and you have the cool minor sounds of A Dorian. Remember to keep going to back those A notes and make that the tonal center.
Try mixing A Minor Pentatonic, A Major Pentatonic, and A Dorian over all the chords. Explore and see which sound best to your ears.
Treat each chord as a separate event:
Try switching pentatonics over each chord. Over just the A7 chord try A Minor Pentatonic & Blues and A Major Pentatonic. Over just the D7 chord try D Minor Pentatonic & Blues or D Major Pentatonic. Over the E7 chord try E Minor Pentatonic & Blues or E Major Pentatonic.
Because the chords in this jam are dominant chords you can try the Mixolydian mode over each chord. Mixolydian mode sounds great over dominant chords like 7ths and 9ths. This is an incredibly useful mode, especially for blues and jazz playing.
The Mixolydian Mode is a seven-note scale often used in blues and rock. Mixolydian is considered a major mode and is always the 5th mode in any major key. Often it’s the mode of choice played over dominant chords, like dominant 7ths and 9ths. Mixolydian is basically a major scale, (Ionian Mode), but with a b7th interval instead of a natural 7th:
Mixolydian Mode = 1, 2, 3, 4, 5, 6, b7
Major Scale (Ionian Mode) = 1, 2, 3, 4, 5, 6, 7
Try this mode over dominant chords like 7th and 9th chords when treating each chord as a separate event. Mixolydian is the 5th mode in any major key. Remember, the key is to shift the tonal center to the root of the mode.
So to play A Mixolydian over the A7 chord ask what major scale’s fifth note is an A note. The answer is D. The fifth note of a D major scale is an A note. So play D Major scales over the A7 chord but emphasize the A notes for A Mixolydian. D Major and A Mixolydian consist of the same notes:
A Mixolydian Mode -A, B, C#, D, E, F#, G
D Major scale – D, E, F#, G, A, B, C#
Remember, it’s all about MOOD and EMPHASIS when playing in the modes. Which note you start on and emphasize produces the different moods and sound textures of each mode. So be sure to switch to the root of the mode.
Over the A7 chord try A Mixolydian, (same as D Major). Over the D7 chord try D Mixolydian, (same as G Major). Over the E7 chord try E Mixolydian, (same as A Major).
Try mixing Minor Pentatonic and Major Pentatonic over each chord. For example play A Major Pentatonic over the A7 chord, then switch to A Minor Pentatonic & Blues over the D7 chord. Then try A Major Pentatonic again when you get to the E7 chord. Listen to how well this technique outlines and implies the chord changes. Mix this up a bit, maybe the next time around the progression try A Minor Pentatonic & Blues over the E7 chord instead of the major, or maybe Dorian. Get creative and have fun jamming with these tracks! And remember, your playing is an evolution.