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Learn keys for electronic music · Section 4 of 12

Every key, part 1: the black-key ladder

Twelve minor keys look like twelve things to memorise. They are one pattern: each key is the white keys with some swapped for black ones, and the swaps follow a fixed order. This section explains the order, then covers the keys with one or two black keys (E, D, B and G minor) and drills them until you can find them without looking anything up.

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4.1 A key is a set of black keys

A minor uses only white keys. Every other minor key keeps the same gaps between notes (2, 1, 2, 2, 1, 2, 2 semitones) but starts somewhere else, so some white keys have to be swapped for a neighbouring black key to keep the gaps right.

That makes the useful question for any key: which black keys does it use? Everything else is white keys.

The keys form a ladder from A minor. Going up seven semitones gives the next sharp key and adds one sharp: E minor, then B, F♯, C♯, G♯. Going up five semitones gives the next flat key and adds one flat: D minor, then G, C, F, B♭, E♭.

The order the black keys join in is easy to see on the keyboard. Sharp keys fill the black keys from the left of each group: F♯, then C♯, then G♯, D♯, A♯. Flat keys fill them from the right: B♭, then E♭, then A♭, D♭, G♭.

Exercises

4.2 One black key: E minor and D minor

E minor: E F♯ G A B C D. White keys from E, with F swapped for F♯, the left black key of the group of three. Over an E bass, F sounds sour and F♯ fits.

D minor: D E F G A B♭ C. White keys from D, with B swapped for B♭, the right black key of the group of three.

Compare D minor with D Dorian from section 3, which keeps B natural. That one note is the difference between the two.

Each new black key follows a rule. On the sharp side it sits a whole tone above the new home note (E, then F♯). On the flat side it is the sixth note of the new key (D minor’s sixth note is B♭).

Exercises

4.3 Two black keys: B minor and G minor

B minor: B C♯ D E F♯ G A. E minor’s F♯ stays and C♯ joins, a whole tone above B. Both are the left black key of their group: one in the pair, one in the three.

G minor: G A B♭ C D E♭ F. D minor’s B♭ stays and E♭ joins, the sixth note of G minor. Both are the right black key of their group.

Under the hand, B minor puts finger 2 on C♯ straight after the thumb on B, then the thumb on E and finger 2 on F♯. It’s the same shape twice, one group along.

G minor is the mirror: finger 3 on B♭ and finger 3 again on E♭.

Exercises

4.4 Finding home fast

Before improvising in a key, find three notes: home, the minor third (3 semitones up) and the fifth (7 semitones up). Together they make the key’s minor chord, and they’re the safest notes to land on.

Ending a phrase on home sounds finished. Ending on the fifth leaves it open, so the next phrase sounds like an answer.

Pentatonic works in any key: take the scale and drop its second and sixth notes. B minor pentatonic is B D E F♯ A. The two dropped notes are the ones most likely to clash with a chord, which is why the pentatonic is the safe version.

Exercises

4.5 Key flash

These drills give you a random key from this section with nothing lit. Speed comes from knowing each key’s black keys, so the first drill asks for only those.

Aim for under four seconds a key. Most of that time is spent remembering the key rather than finding the notes, and remembering gets quicker with practice.

Exercises

← Scales as safe zones All sections Every key, part 2: busy keys and any key →

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