The circle of fifths is a deceptively simple diagram that lays out every musical note, key, three-note chord and scale, and charts the relationship between them. A bit like a musical version of the ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Key changes - or ‘modulations’, to give them their proper, music theory-professor name - may have ...

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.