THIS SLIDING NOTE RULER IS A SIMPLE WAY TO FIGURE OUT SCALES, MODES AND, AND CHORDS.  JUST LINE UP THE ROOT NOTE IN THE SLIDING BAR ABOVE WITH (1) AND USE THE NUMBER SEQUENCE FOR A GIVEN FORMULA. 

EXAMPLE: FIND THE MAJOR SCALE FOR THE KEY OF D.  LINE UP THE D WITH 1 AND SEE: D E F# G A B C# D
WHAT COULD BE EASIER?

SCALES
MAJOR SCALE FORMULA: 1   2   3   4   5   6   7   8
MINOR SCALE FORMULA: 1   2  b3  4   5  bb7  8
HARMONIC MINOR SCALE: 1  2 b3 4   5 b6  7  8
MELODIC MINOR SCALE:  1    2  b3 4   5   6   7   8

PENTATONIC MAJOR SCALE: 1 2 3 5 6 
PENTATONIC MINOR SCALE: 1 b3 4  5  b7

MODES (Using  the key of C as an example)
IONIAN: SAME AS MAJOR SCALE
DORIAN: 2 3 4 5 6 7 8 (9)
               D E F G A B C D
PHRYGIAN: 3 4 5 6 7  8 (9)(10)
                  E F G A B  C  D  E
LYDIAN: 4  5 6  7 8  (9)(10)(11) 
              F  G A B  C  D   E    F
MIXOLYDIAN: 5  6 7  8 (9) (10)(11)(12)
                      G A B  C  D    E    F     G
AEOLIAN: 6  7   8 (9)(10)(11)(12)(13)
                A  B  C  D    E    F     G    A
LOCRIAN 7  8 (9)(10)(11)(12)(13)(14)
              B  C  D    E    F     G    A    B



HOW TO DETERMINE THE 7 BASIC CHORDS OF A GIVEN KEY:


Roman numerals are used to distinguish chords from notes,with capitals for major chords and lower case for minor chords.

I IV V=Names of major chords
ii iii vi=Names of minor chords
vii=7th chord
Example, Key Of D: 
I IV V= D, G, A = major chords
ii iii vi= Em, F#m, Bm = minor chords
vii= A7 = 7th chord


CHORD THEORY: HOW CHORDS ARE MADE
Chords are formed by adding 2 or more notes to the root.



MAJOR FAMILY

Major
6th
Major 7th
Major 9th
Major 13th
Six/Nine
1 3 5             C  or Cmaj 
1 3 5 6          C6
1 3 5 7          Cmaj7
1 3 5 7 9       Cmaj9
1 3 5 7 9 13  Cmaj13
1 3 5 6 9       C6/9



MINOR FAMILY

Minor
Minor 6th
Minor 7th
Minor 9th
1 b3 5            Cm
1 b3 5 6         Cm6
1 b3 5 b7       Cm7
1 b3 5  b7 9   Cm9



DOMINANT FAMILY

7th
11th
13th
1 3 5 b7               C7
1 3 5 b7 9 11       C11
1 3 5 b7 9 11 13  C13



AUGMENTED & DIMINISHED

Augmented
Diminished
1 3 #5          Caug or C+
1 b3 b5 b7    Cdim or C°