Assemble a piece of music by merging the alphabetic representation of the predetermined musical pattern and the provided melodic theme.
X:1
L:1/4
M:23/44
K:Bb
['[fB] ([Ae]']  
X:1
L:1/4
M:23/44
K:Bb
|: [DB] |"F7" ([CA] [Ec]) |"Bb" ([DB] [Fd]/) z/ [DB] |"F7" ([CA] [Ec]) |"Bb" [dF] z [BD] | 
"F7" ([CA] [Ec]) |"Bb" ([DB] [Fd]/) z/ [fB] |"F7" ([Ae] [EA]) |"Bb" [BD] z :: [fB] | 
"F7" ([Ae] [Ec]) |"Bb" ([Fd] [DB]) z/ [fB] |"F7" ([Ae] [Ec]) |"Bb" [Fd] z [fB] |"F7" ([Ae] [Ec]) | 
"Bb" ([Fd] [DB]) z/ [Fd] |"F7" ([Ec] [CA]) |"Bb" [BD] z :|  