Add a 4-bar POP FRETLESS BASS track in the following composition:
PS T4Q4 GMPOP KMC BM70 CMBb6QCQBb6QDm7 BL4 IL113Q36Q0Q65Q76Q28Q5 TS INST5 DN2 BS BE BS NO68 NO64 NO61 TD7X833 NOF68 NOF64 NOF61 TD0X167 NO66 NO63 NO59 TD7X833 NOF66 NOF63 NOF59 BE BS NO64 NO61 NO57 TD7X833 NOF64 NOF61 NOF57 TD0X167 NO66 NO63 NO59 TD7X833 NOF66 NOF63 NOF59 BE BS NO68 NO64 NO61 TD7X833 NOF68 NOF64 NOF61 TD0X167 NO66 NO63 NO59 TD7X833 NOF66 NOF63 NOF59 BE TE TS INST76 DN0 BS BE BS BE BS BE BS TD2X0 NO85 TD0X833 NOF85 TD0X5 NO83 TD0X833 NOF83 TD1X167 NO80 TD0X833 NOF80 TD1X167 NO78 TD3X833 NOF78 TD0X167 NO80 TD0X667 NO76 TD0X031 NOF80 TD0X802 NOF76 TD1X167 NO78 TD0X833 NOF78 TD0X5 NO80 TD0X667 NOF80 BE TE TS INST0 DN0 BS BE BS BE BS BE BS BE TE TS INST28 DN0 BS TD7X333 NO54 TD0X667 NOF54 TD1X333 NO52 TD0X667 NOF52 TD1X333 NO49 TD0X667 NOF49 NO52 TD1X833 NOF52 TD0X167 NO49 TD0X833 NOF49 BE TE PE
TS INST36 DN1 BS NO33 TD1X833 NOF33 TD0X167 NO32 TD1X833 NOF32 TD0X167 NO30 TD1X833 NOF30 TD2X167 NO35 TD0X833 NOF35 TD2X5 NO35 TD0X833 NOF35 TD1X167 NO35 TD0X667 NOF35 NO35 TD0X167 NOF35 BE BS NO37 TD1X833 NOF37 TD0X167 NO35 TD1X833 NOF35 BE BS NO33 TD1X833 NOF33 TD0X167 NO32 TD1X833 NOF32 TD11X5 NO32 TD0X333 NOF32 BE BS NO37 TD1X833 NOF37 TD0X167 NO35 TD1X833 NOF35 TD11X5 NO35 TD0X333 NOF35 BE TE