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Theoretical speaking how can I tell the correct scale name between these three scales?

B♯ ==> C <== D♭♭ ?

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    Db isn't equivalent to C, but Dbb would be. I've closed this as a duplicate that goes into the distinction of when notes are used and why. If this isn't what you were asking, please make it a little clearer what exactly you want to know. – Dom Jun 5 '17 at 5:50