rhythm harmony cover and inlay

One day, this man came to my office. An eccentric but friendly young producer named Dede Suryana from Oasis Records. He’s about to produce an album for 12 Independent (Indie) Bands. He has already had the name for the album, it’s “Rhythm Harmony”. He asked me to make something densely colorful but still united in one harmony.

I have to hear the CD 1st, so I undestand their color. Then I suggested him a tagline “Different Colors, Different Cultures, and One Harmony”. And here’s the design.