Add a 8-bar POP CELLO track in the following composition:
PS T4Q4 GMPOP KMC BM80 CMCQFmQAbQCQEb BL8 IL48Q43Q73Q48Q0Q0Q48Q73Q68 TS INST48 DN0 BS BE BS BE BS BE BS BE BS BE BS BE BS NO67 TD16X0 NOF67 BE BS NO70 TD16X0 NOF70 BE TE TS INST48 DN0 BS BE TE TS INST73 DN0 BS BE TE TS INST0 DN0 BS NO60 TD16X0 NOF60 BE BS NO53 TD6X0 NO82 TD0X5 NOF82 NO81 TD0X5 NOF81 NO79 TD0X5 NOF79 NO75 TD0X5 NOF75 NO72 TD0X5 NOF72 TD7X5 NOF53 BE BS NO60 TD16X0 NOF60 BE BS NO55 TD16X0 NOF55 BE BS NO48 TD16X0 NOF48 BE BS NO53 TD16X0 NOF53 BE BS NO36 NO60 TD16X0 NOF36 NOF60 BE BS NO31 NO55 TD16X0 NOF31 NOF55 BE TE PE
TS INST43 DN0 BS BE BS BE BS BE BS BE BS BE BS BE BS NO48 TD16X0 NOF48 BE BS NO43 TD16X0 NOF43 BE TE