If you want to want to play an F major chord, just hit an F, an A, and a C — all white keys, all in a row. If you want to play a B major chord, you hit B, a D#, and an F#. One white key ...

Harmonic minor keys are used when writing chords. There is another version of ... Each key signature has two possible keys. The major key and the minor key, which will begin on a different note.