Maklumat adalah disesuaikan dari nota pelapik State of the Art (Edisi Istimewa):

• Park Kwun-young - penerbit
• Shinhwa - penerbit bersama
• Lee Jang-eon - penerbit bersama
• Park Bong-gu - penerbit muzik
• Park Hyeok - jurutera bunyi
• Choi Hyo-young - mastering
• Sam Lee - gitar ("Thanks!", "Doobob", "Chance", "Why Me...")
• Ko Tae-young - gitar ("Your Man", "Once in a Lifetime", "Throw My Fist", "Midnight Girl (Versi pop balada)")
• Park Su-won - gitar ("Highway Star")
• Hong Joon-ho - gitar ("Midnight Girl", "You're My Everything")
• Cho-Joon-soo - bass ("Midnight Girl (versi pop balada)"
• K-Strings - alat tali ("Weak Man", "One in a Lifetime", "Throw My Fist", "Why Me...")
• Shin Min - susunan alat tali ("Weak Man", "Why Me...")
• Lee Na-il - susunan alat tali ("Sekali dalam seumur Hidup", "Membuang Saya Fist")
• Ryu Hyeong-seob - susunan alat tali ("Throw My Fist")
• Hwang Seong-jae - program, keyboard ("Thanks!")
• Jang Ji-won - keyboard ("One in a Lifetime", "Midnight Girl (versi pop balada)")
• Kang Su-hyo - dram ("Once in a Lifetime")
• Jang Sang-hyeon - dram ("Midnight Girl (versi pop balada)")