Chord sequence

D7, G7, D7, G7, D7, Em7, A7, D7, A7

D7 G7 D7 G7 D7 Em7 A7 D7 A7

Tempo 120 BPM

Rootless Shells Guide tones Rooted shells Rooted Drop 2

Four-note rootless voicings in their two forms, with the 3rd or the 7th on the bottom, played over the root.

Customize each chord

D7
G7
D7
G7
D7
Em7
A7
D7
A7

Analysis

Heard in D major

Each chord's roman numeral and role in D major
Chord	Numeral	Role
D7	V7/IV	Secondary dominant of IV
G7	IV7	Blues dominant
D7	V7/IV	Secondary dominant of IV
G7	IV7	Blues dominant
D7	I7	Blues dominant
Em7	ii7	Subdominant
A7	V7	Dominant
D7	I7	Blues dominant
A7	V7	Dominant

Progressions in these changes

All the chords

Blues with ii-V in D

The basic blues with a ii-V in bars 9 and 10 in place of V-IV, and a V7 turnaround in the last bar.
Chords 6 to 7

Major ii-V Progression in D

Em7 A7

Scales to play