Generate the names of the keys on a piano
Bash shell script (58)

echo {8..0}{B,♭B,A,♭A,G,♭G,F,E,♭E,D,♭D,C}|rev|cut -b40-410


If you do not have rev, you can instead use tac -rs. at a cost of five characters.

Bending the rules, I can subtract thirteen characters (for a score of 45):

echo {8..0}{B,♭B,A,♭A,G,♭G,F,E,♭E,D,♭D,C}|rev


If you really need a bash array, add six characters to the score (for a score of 64): 

a=(`echo {8..0}{B,♭B,A,♭A,G,♭G,F,E,♭E,D,♭D,C}|rev|cut -b40-410`)