For those that are working on learning how to build major scales, and we'll be doing in-depth lessons on this subject in the future, here is a quick reference guide so that you can practice writing out and memorizing the different keys for the major scale.
There are two ways to build a major scale.
The first is using the interval pattern that I wrote out just below.
You simply start on the root note that you have in mind, then follow the following interval pattern in order to build the major scale.
W - W - H - W - W - W - H
Where W = Whole Step, two frets on the guitar, and H = Half Step, 1 fret on the guitar.
You can see this applied to a C major scale like so.
C (W) D (W) E (H) F (W) G (W) A (W) B (H) C
Try writing out a few keys of the major scale using this system in order to memorize the formula, and get used to applying it to different root notes on the go.
The second way to think about major scales, and how to build them, is to memorize what's called the key signature.
This is the number of sharps or flats any major scale has in it's construction.
As a quick reference, if you want to explore this approach further, here are all the sharp keys and which notes are sharp within the major scale.
C - none
F - Bb (1)
Bb - Bb, Eb (2)
Eb - Bb, Eb, Ab (3)
Ab - Bb, Eb, Ab, Db (4)
Db - Bb, Eb, Ab, Db, Gb (5)
Gb - Bb, Eb, Ab, Db, Gb, Cb (6)
Cb - Bb, Eb, Ab, Db, Gb, Cb, Fb (7)
An easy way to apply this system is to memorize the order that flats are added to the different scales:
Bb, Eb, Ab, Db, Gb, Cb, Fb
And then to find the key, you just count up the order of flats and add one more after you come to the key that you are on.
So, if you are wondering how many flats are in the key of Ab, you count up the order of flats until you hit Ab
Bb, Eb, Ab
Then just add one more and that's how many flats you have in that key
Bb, Eb, Ab, Db (4)
This means that the Ab major scale contains the notes:
Ab Bb C Db Eb F G Ab
The “white notes” on the piano plus the 4 flats that we figures out above.
So, the key you are looking for, is always the second last note in the order of flats.
Here is the same idea but with sharp keys.
C - none
G - F# (1)
D - F#, C# (2)
A - F#, C#, G# (3)
E - F#, C#, G#, D# (4)
B - F#, C#, G#, D#, A# (5)
F# - F#, C#, G#, D#, A#, E# (6)
C# - F#, C#, G#, D#, A#, E#, B# (7)
To figure out how many sharps a key has, if it is one of the "sharp" keys, you first memorize the order that sharps are added to each new key.
F#, C#, G#, D#, A#, E#, B#
Then, you find the key you wan, say D, and go down 1 half-step, that will be the last # in the order.
So for D, you look at the note 1 half-step lower, C#, and that is the last # from the list above.
Therefore, the key of D major has 2 Sharps, F# and C#.
D E F# G A B C# D
The D major scale has all the “white notes” of the piano, plus the 2 sharps that we figured out above, F# and C#.
Try to write out a number of major keys that contain sharps to practice memorizing the order of sharps, as well learning to figure out the key signature and notes with any given major scale on the spot
We are going to continue to explore building major scales in further posts, so this is a short primer to get you started and to help you find a few tricks of the trade to write out, or memorize the key signatures, for the different major scales.
If you have any questions post them below and I'll be happy to answer them.
So, as I showed you how I learned figuring out sharps with circle of fifths, we can figure out flats using circle of fourths, right? We can turn every fourth note in the key to a flat and then change those notes to flats in all the keys below, right?
C D E F G A B C
F G A Bb C D E F
Bb C D Eb F G A Bb
Eb F G Ab Bb C D Eb
Ab Bb C Db Eb F G Ab
Db Eb F Gb Ab Bb C Db
Gb Ab Bb Cb Db Eb F Gb
Like that? So we can use circle of fifths to figure out sharps and circle of fourths to figure out flats!
Brilliant! Thank you professor!
what is a key signature?is it the flat or sharp notes in the scale?
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