Constructing D Major
Since the key of D major uses the notes in the D major scale, you need to construct the D major scale. If you do that and identify the sharps and flats, you’ll have figured out the key signature for the key of D major. You already figured out all of the notes in the D major scale in a previous chapter. Let’s do that again but this time focus on building the key signature. Have your guitar with you as you do this. The goal is to identify any sharps or flats.
Write “D Major” under your work from the last lesson. Under that, write out a starting template with all the letter names like this:
D E F G A B C D
Do This!
- Since we want a D scale, we need to find a D note to start. Let’s choose the 4th string open since it’s the D string. We’ll also label the degree below the note so we keep track of where we are in the scale. Play the starting D note and say out loud, “First degree, D.”
- Now, say out loud, “From one to two is a whole step. A whole step higher than D is E.” Move up a whole step (two frets) and play the E. Since we didn’t use a sharp or flat, we don’t need to update our piece of paper.
- Now, say out loud, “From two to three is a whole step. A whole step higher than E is F♯.” Move up a whole step (two frets) and play the F♯. Remember that E to F is only a half-step, but we need a whole step between scale degrees 2-3. Going from E to F gives us only a half-step, so we need to bump that F up to F♯ to get our whole step. Now – write the ♯ symbol on your paper after the F to show the F in the key of D is F♯.
- Now, say out loud, “From three to four is a half-step. A half-step higher than F♯ is G.” Move up a half-step (one fret) and play the G.
- Now, say out loud, “From four to five is a whole step. A whole step higher than G is A.” Move up a whole step (two frets) and play the A.
- Now, say out loud, “From five to six is a whole step. A whole step higher than A is B.” Move up a whole step (two frets) and play the B.
- Now, say out loud, “From six to seven is a whole step. A whole step higher than B is C♯.” Move up a whole step (two frets) and play the C♯. Just like back at degrees 2-3 and the E and F notes, we need a whole step here at degrees 6-7. But B to C is only a half-step. So we need to bump that C up to C♯ to get our whole step. Now – write the ♯ symbol on your paper after the C to show the C in the key of D is C♯.
- Finally, say out loud, “From seven to eight is a half-step. A half-step higher than C♯ is D.” Move up a half-step (one fret) and play the D.
- There you have it – all the notes in a D major scale, which are all the notes in the key of D major. There are two sharps: F♯ and C♯. So the key signature for D major is: F♯ and C♯.
Let’s try one in the next lesson that’s a bit more challenging – the key of A.