This is known as the relative minor. So G major, for example has a key signature of one sharp, but this is also the key signature for E minor.

A relative minor is simply the minor key that uses the same notes as a particular major key, and vice versa. So, looking at the circle we can see (at the top) that the relative minor to C major is ...

The relative minor of C major is A natural minor. Starting on a different note means the gaps between scale tones and the root note are shuffled, giving the two scales different moods. The natural ...

At first glance, it doesn’t seem like a very important one — it’s neither the most nor the least popular, at a slight 2.5%. It gets more interesting though, when you look at its relatives.

Spotify’s library has 30 million songs, and Ning claims his data includes analysis of every track to determine which keys are most popular on the service.Out of all keys available, G Major ...