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Keys
A ‘key’ is made up of the notes of any major scale, and the chords that can be built using the notes of this same scale. How would you build these chords? You’d take one of the notes of the scale, and then skip the next note, take the next note, skip the next note, and take the next note. That would give you a 3 note chord.
Example, the C Major scale:
C, D, E, F, G, A, B 1, 2, 3, 4, 5, 6, 7
Let’s start with the note C for simplicity, and then skip the next note, take the next note, skip the next note, and take the next note and you get C, E, G, right? The chord C is made up of the notes C, E and G.
If you build chords on every note this way, you get:
C, E, G – called the C chord. – it’s built on the 1 of the scale and called the I chord. D, F, A – called the Dm chord. – it’s built on the 2 of the scale and called the II chord. E, G, B – called the Em chord. – it’s built on the 3 of the scale and called the III chord. F, A, C – called the F chord. – it’s built on the 4 of the scale and called the IV chord. G, B, D – called the G chord. – it’s built on the 5 of the scale and called the V chord. A, C, E – called the Am chord. – it’s built on the 6 of the scale and called the VI chord. B, D, F –called Bmb5 –you can pretty much ignore this chord. It has a weak, unstable sound and is almost never used in rock, country or pop. It’s the VII chord.
So, we say that the ‘Key of C’ contains the notes C,D,E,F,G,A,B and contains the chords C, Dm, Em, F, G, Am and Bmb5.
Notice the Roman Numeral numberings of the chords.
Any song that is truly in the key of C contains nothing but these notes and chords. Sometimes one part of a song will be in one key like C, and another part of the song, maybe even for just a couple beats, will be in another key because that part of the song had a note or chord that’s NOT in the key of C.
What would the chords of the key of E be?------ E, F#m, G#m, A, B, C#m and D#mb5. You should be able to figure this out for yourself.
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