Identify the three core elements that serve as the raw materials for blues songs.

• A. 12-bar blues form, the blues scale, and the shuffle rhythm
• B. The blues scale, call-and-response, and tempo changes
• C. 12-bar form, major scale, and swing rhythm
• D. Call-and-response, blues scale, and fast tempos

Answer: (A)

Blues songs are built from a 12-bar blues form, the blues scale, and a shuffle rhythm. The 12-bar blues form provides a simple, repeatable harmonic framework—three four-bar phrases commonly revolving around the I, IV, and V chords—so musicians have a familiar structure for both melodies and improvisation. The blues scale gives the melodic vocabulary, adding the distinctive blue note to the minor-pentatonic foundation to create that characteristic blues flavor. The shuffle rhythm supplies the groove, a triplet-based swing feel that gives the music its driving, soulful feel rather than a straight, even pulse. Together, these elements supply the essential structure, color, and groove that define blues music.