Add a 4-bar POP CHOIR AAHS track in the following composition:
PS T4Q4 GMPOP KMC BM65 CMBbmaj7QC6QBbmaj7QC BL4 IL6Q6Q50Q6Q0Q47Q80Q53 TS INST50 DN1 BS TD8X0 NO65 NO62 TD7X979 NOF65 NOF62 BE BS NO65 NO62 NO46 TD7X979 NOF65 NOF62 NOF46 TD0X021 NO64 NO60 NO48 TD7X979 NOF48 TD0X021 NOF64 NOF60 BE BS NO64 NO60 TD7X979 NOF64 NOF60 TD0X021 NO65 NO62 TD7X979 NOF65 NOF62 BE BS NO65 NO62 NO46 TD7X979 NOF65 NOF62 NOF46 TD0X021 NO60 NO64 NO48 TD7X979 NOF48 TD0X021 NOF60 NOF64 BE TE TS INST6 DN0 BS BE TE TS INST6 DN0 BS BE TE TS INST0 DN0 BS BE BS BE BS BE BS BE TE PE
TS INST53 DN1 BS NO60 TD3X979 NOF60 TD0X021 NO67 TD1X979 NOF67 TD0X021 NO65 TD5X979 NOF65 BE BS NO62 TD3X979 NOF62 TD0X021 NO69 TD3X979 NOF69 TD0X021 NO67 TD3X979 NOF67 BE BS NO60 TD3X979 NOF60 TD0X021 NO67 TD1X979 NOF67 TD0X021 NO65 TD5X979 NOF65 BE BS NO62 TD3X979 NOF62 TD0X021 NO69 TD3X979 NOF69 TD0X021 NO67 TD3X979 NOF67 BE TE PE