The document discusses several audience theories that can be applied when designing a music magazine, including: - Burton's theory of socially and media grouped audiences, which the magazine would divide by gender, age, ethnicity, and interest in music. - Hartley's concept of dividing the audience by self-identification, gender, and age group to appeal to older teenagers and young adults. - Dyer's theory that audiences will engage with messages addressing their personal inadequacies, like isolation, which the magazine could do through artist interviews. - Fiske's additional factors of education, region, and urban vs. rural when identifying the target audience.