Apple Music is a music streaming service by Apple, and it designs its own playlists. While they are unique in their graphic expressions, they don't have a consistent system. The goal was to design a consistent system between categories and playlists, in addition to producing a campaign based on that system. I was inspired by the wave of sound vibration and created a visual system from that. Each category will have its own color, and shapes in the playlist will always change. The campaign's concept is a letter. A letter is a connecting tool between people, which is private. So I wanted to use a letter to give people the feeling of receiving a personal letter from Apple. By using the slogan Letter from Apple, the campaign is designed with the playlist's system.