from Amazing Phrases
Similar to the traditional blues lyrics format, call-and-response phrasing usually comes in groups of three consecutive phrases: introductory phrase, an exact or close repeat of the introductory phrase, and a resolving phrase.
This solo uses call-and-response techniques to navigate two choruses of a 12-bar blues in A. In the first chorus each call/response/conclusion spans four measures, making a total of three sets of call-and-response phrases. The second chorus, however, takes a different approach by extending the phrasing, resulting in one long call/response/conclusion section.
Listen to the audio example