这次PLAYBACK系列的第四首歌曲是1991年“艺术家尹尚”作曲，“歌手姜修智”作词制作的歌曲《分散的日子》。法国爵士乐叙事曲的火星和城市叙事曲的动感和完成度的制作，将于2021年重新打造，献给大家。[Credit]Executive producer by 신민섭Music Produced by 김신일,백현수​작사 : 강수지작곡 : 윤상편곡 : 김신일,백현수Vocal 한슬Piano 정모세Keyboard 백현수Guitar 정수완Bass 백현수Synthesizer 백현수Drum 김신일String arrange 전해일Programming 김신일,백현수Background Vocal 한슬,백현수​Recorded by inthecity (@Background studio)Digital Edited by 김신일Mixed by Adam (True Sound)in L.AMastering by Adam (True Sound)in L.A​Artwork 김진아