In your first paragraph, write a little about the composer and why you chose that composer to write to them about. What is it about that composer that you find interesting? Why did you choose this particular piece of music? What is it about that piece of music that makes you want to convince your friend or family member to listen to it?
In your second paragraph, describe the piece of music. You can write about instruments, sounds, techniques, tempo, dynamics, anything that would give your reader enough details about the piece so that they could have some idea of what they would be hearing when they get the chance to listen to it.
In your third paragraph, tell them why you think *they* would like it – do they like other music like this? Do they have an open mind when it comes to new sounds? Do they like other genres of contemporary art? (In other words, why did you choose this person to write to?)