In "West End Blues" by Louis Armstrong, what is the term for the interplay between clarinet and voice starting at 1:25?

The term for the interplay between clarinet and voice starting at 1:25 in "West End Blues" by Louis Armstrong is indeed call and response. This musical technique is characterized by the sequence where one musical phrase (the "call") is presented by one instrument or vocal part, and is immediately followed by a contrasting phrase (the "response") from another instrument or vocal part. This interaction creates a dynamic dialogue and is a foundational element in many musical traditions, particularly in jazz, blues, and various forms of folk music.

In "West End Blues," the clarinet's melodic lines and Armstrong's vocal phrases demonstrate this back-and-forth exchange, showcasing both the improvisational skill of the performers and the rich emotional content of the music. This technique not only emphasizes the dialogue between the musicians but also enhances the overall texture and depth of the piece.