Dance and Music design with HCID

Music design and Dance design are user-centered design? I think so, but the role of "user" should be think over.

All of composer, performer and audience could be user.

Performer as a user, the human-computer interaction is performer- action, music, instruments and stage interaction.

Audience as a user, the interaction is between audience and performance.

So music and dance design have two different target groups, and two different interactions.

As a designer in music and dance design, the main theme is how to express emotions,
happy, blue, impressive...

They are different from some other designs because some other designs should able to help users to complete some task as necessary tools.