A backcycle is one of the most elegant ways to approach a chord change — instead of sitting on the I and jumping to the IV, you create a chain of dominant chords that naturally leads the ear to the destination. It is a technique borrowed from bebop, and it works beautifully in blues.
What you’ll get out of this lesson: An understanding of what a backcycle is and how to use it to lead into the IV chord in blues — both in your comping and in single-note lines.
What is a backcycle?
A backcycle (also called a back-cycling or reverse ii–V chain) works by taking the target chord and working backwards through a series of dominant chords, each a fifth apart. To approach the IV chord (for example, C7 in the key of G), you might precede it with G7, which is already the I, but before that you could imply D7 — the dominant of G — and before that, A7. Each dominant resolves a fifth down to the next one, creating a sense of inevitability as the music arrives at the IV.
Outlining the backcycle in lines and comping
The backcycle can be as simple as a two-chord movement (the V of IV resolving to the IV) or as extended as a full three- or four-chord chain. In a single-note solo, you outline the movement by targeting chord tones of each dominant chord in turn. In comping, you can voice the chords explicitly or imply them with brief arpeggio fragments. The key is to make the resolution to the IV feel earned — the chain of dominants should build just enough tension that the IV lands with a sense of arrival.
Taking it further: Try combining a backcycle with some of the I-chord alterations from the previous lesson. Set up the tension with an altered I, move through the backcycle, and release it cleanly on the IV. That three-stage structure — tension, movement, resolution — is a complete musical thought.
Your homework: Over a simple blues in G, practise inserting a two-chord backcycle (D7 to G7 as a brief passing moment, then landing on C7) in bars 4–5. Keep it short and clean. Once you can hear how the D7 pulls toward the IV, try extending it to a three-chord chain.