![]() pitch distance between those keys is one semitone. If there is no black key between two white keys, for example E and F, the interval i.e. pitch distance between those keys is one whole tone, denoted as "w" in the picture below. If there is a black key between two white keys, for example C and D, the interval i.e. ![]() The piano keyboard has been deliberately designed so that it is easy to play diatonic things in the keys of C major and A minor. These are the notes of the C major scale, and a similar geometry of intervals exists in all keys, it just starts from a different note and the white/black key distribution isn't so simple when you start elsewhere. ![]() Let's look at diatonic notes starting from C. Thus the chord rooted on the 7th scale degree becomes a fully diminished seventh chord. Thus the chord rooted on the 5th scale degree becomes a dominant seventh chord.Ĥ It is conventional in a minor key to raise the 7th scale degree by a half step to create a leading tone. Thus the chord rooted on the 7th scale degree becomes diminished.ģ It is conventional in a minor key to raise the 7th scale degree by a half step to create a leading tone. Thus the chord rooted on the 5th scale degree becomes major.Ģ It is conventional in a minor key to raise the 7th scale degree by a half step to create a leading tone. 1 It is conventional in a minor key to raise the 7th scale degree by a half step to create a leading tone.
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