Here's a simplified tale of music theory. The seventh note of a major scale is very powerful. In G major the notes are G, A, B, C, D, E, F#, so we're talking about ...

Harmonic minor keys are used when writing chords. There is another version of the minor key known as the melodic minor. This is used when writing a melody. Each key signature has two possible keys.

Only the order of tones and semitones is different. Both keys have the same key signature, shown here:. Because they share the same key signature and the same notes, it is common to modulate or change ...