소프트팝 트리오 아키버드 (Aquibird)의 '언제부터였을까?'는 가볍게 움직이는 멜로디와 통통 튀는 신스 사운드가 인상적인 곡이다. DMCJ 버전은 신스팝의 전형을 따르면서도 아키버드만의 기타팝 사운드가 돋보이며, Bronze 버전에는 8BallTown의 프로듀서 Bronze(브론즈)가 편곡에 참여하여 2019년 발매된 브론즈의 정규앨범 [East Shore]의 잔향을 떠오르게 한다.[Credits]01. 언제부터였을까(DMCJ Version)작곡 : DJ Magik Cool J작사 : DJ Magik Cool J편곡 : DJ Magik Cool J, 임정우보컬 : 유연코러스 : DJ Magik Cool J건반 : DJ Magik Cool J기타 : 임정우믹싱 : DJ Magik Cool J마스터링 : DJ Magik Cool J녹음 : 양은채일러스트 : 밀새02. 언제부터였을까(Bronze Version)작곡 : DJ Magik Cool J작사 : DJ Magik Cool J편곡 : Bronze보컬 : 유연코러스 : DJ Magik Cool J건반 : DJ Magik Cool J기타 : Bronze믹싱 : Bronze마스터링 : DJ Magik Cool J녹음 : 양은채일러스트 : 밀새=============================================================영문 소개 자료Aquibird's new single, 'When Did You Know?' is released in two versions. The DMCJ version is arranged by DJ Magik Cool J of Aquibird and the Bronze version is arranged by Bronze, a producer from 8BallTown.[Credits]01. When Did You Know(DMCJ Version)Composed by DJ Magik Cool JLyrics by DJ Magik Cool JArranged by DJ Magik Cool J Vocal by YuYeonChorus by DJ Magik Cool JKeyboard by DJ Magik Cool JGuitar by Lim JungwooMixed by DJ Magik Cool JMastered by DJ Magik Cool JRecorded by Yang EunshaeIllustration by Milsae02. When Did You Know(Bronze Version)Composed by DJ Magik Cool JLyrics by DJ Magik Cool JArranged by Bronze Vocal by YuYeonChorus by DJ Magik Cool JKeyboard by BronzeGuitar by Lim Jungwoo Mixed by BronzeMastered by DJ Magik Cool JRecorded by Yang EunshaeIllustration by Milsae