Revision 4df68e72-5781-4da2-82e4-b99a22a34d69 - Code Golf Stack Exchange

# Ruby: 75 characters

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 (?0..?9).to_a.product(%w{C Db D Eb E F Gb G Ab A Bb B}).map{|a,b|b+a}[9,88]

(Base idea borrowed from [Matt's solution](http://codegolf.stackexchange.com/a/6808).)