Key Signatures

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The quick, easy way to determine key signatures. Remember that the relative keys have the same key signature. This means that a major key's relative minor has the same key signature as that major key. The relative minor key is a minor third below its relative major. For example, if the key is F major, its relative minor is a minor third below, thus it's d minor. If the key is f minor, then its relative major is a minor third up, Ab major. Got it?

For sharp keys, the major key is a half step above the last sharp. Its minor key is a whole step below the last sharp.

For flat keys, its easy but not as easy as the sharps. Here's the thing: if there is only one flat, the key is either F major or d minor. After that, the second to last flat is the major key. Therefore, two flats would be Bb major. The minor key of the same key signature is a minor third below the major key.

Now, test yourself. Find both the major and minor keys of these key signatures.

keysigs.tif (1844 bytes)

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This page was last modified November 02, 1998
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