Not only that, a lot of the repetitive, fast parts are just one sample being looped in post editing. At , listen to how the "sugu soko made" loop transitions to the next line "nanika ga kite iru". You can clearly tell they are two different recordings. Adding filters and backing vocals as the loop progresses hides it.
藍月なくるの短いビブラート、これだよ
ここの後の高音が……飲まれる澄んだ高音と倦んだように吐き出される低音が良すぎで……
