The two activities are done separately. The call-and-response concept in blues music was different because the call was given by the soloist and the response was by the group.
In music, a call and response is a succession of two distinct phrases usually written in different parts of the music, where the second phrase is heard as a direct commentary on or in response to the first.
learn more about call-and-response concept from here: https://brainly.com/question/26286861