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This question already has an answer here:

How does one find the key to a scale like harmonic minor, or is out of key?

marked as duplicate by David Bowling, Dom theory Nov 23 '18 at 3:14

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  • There are major and minor keys, but not really harmonic or melodic minor keys. They are just minor keys; minor key harmony is somewhat flexible. – David Bowling Nov 17 '18 at 6:23
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For several reasons, all explained in previous answers, there is only one minor key. It happens to contain a cocktail of differing notes, the mainstay of that key is the relationship between the root and its third - a minor third.

You could read that as 12 minor keys..! Each with several different optional scales.

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