Music 1 - Chords on Gitar

By Sheldon L

Published at 2020-06-03

Updated at 2020-06-03

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Intervals

In C Mainer scale:

  0   0.5   1  1.5   2  2.5  3   3.5  4   4.5  5   5.5 |  6  6.5   7  7.5   8  8.5  9   9.5  10  10.5 11  11.5
  C    bD   D   bE   E   F   bG   G   bA   A   bB   B  |  C   bD   D   bE   E   F   bG   G   bA   A   bB   B
unison m2   M2  m3   M3  4   #4   5   m6   M6  m7  M7  octave m9   M9  m10  M10 11  #11  12  m13  M13 m14  M14
  1    #1            b4      b5       #5                  8   #8            b11     b12      #12
            o3           +3       o6       o7  +6         o9           +9                o13      o14 +13

Some times:
                                      b6   6    7  #7                  #9
                                           b7

Scales and Half-step Intervals

Major Scale:

1st 2nd 3rd 4th 5th 6th 7th  |  8th 9th 10th 11th 12th 13th 14th
   2   2   1   2   2   2   1 |     2   2    1    2    2    2    1


Natural minor:

1st 2nd 3rd 4th 5th 6th 7th  |  8th 9th 10th 11th 12th 13th 14th
   2   1   2   2   1   2   2 |     2   1    2    2    1    2    2


Harmonic minor:

1st 2nd 3rd 4th 5th 6th 7th  |  8th 9th 10th 11th 12th 13th 14th
   2   1   2   2   1   3   1 |     2   1    2    2    1    3    1


Melodic minor:

1st 2nd 3rd 4th 5th 6th 7th  |  8th 9th 10th 11th 12th 13th 14th
   2   1   2   2   2   2   1 |     2   1    2    2    2    2    1

Main Notations

• Major = Maj = Ma = M = maj = $\Delta$ = (#, somtimes)
• minor = min = mi = m = (b, somtimes)
• diminished = dimin = dim = o = (b, somtimes)
• augmented = aug = + = (#, somtimes)

Chords

Chord Qualities

Name	Notation	Components
Major Chords	$ R, RM, R\Delta $	R, M3, 5
Minor Chords	$ Rm $	R, m3, 5
Diminished Chords	$ Rdim, Rm^{(b5)}, Ro $	R, m3, b5
Augmented Chords	$ Raug, R^{(\sharp5)}, R+ $	R, M3, #5

Cord Extensions

Name	Notation	Components
dominant 7th	$ R^7, R^{dom7} $	R, M3, 5, m7
Major 7th	$ R^{M7} $	R, M3, 5, M7
minor 7th	$ Rm^7 $	R, m3, 5, m7
minor Major 7th	$ Rm^{M7} $	R, m3, 5, M7
half-diminished 7th	$ Rø, Rm^{7(b5)} $	R, m3, b5, m7
diminished 7th	$ Ro^7, Rm^{(b7)(b5)} $	R, m3, b5, M6
augmented 7th	$ R+^7, R^{7(#5)} $	R, M3, #5, m7
augmented Major 7th	$ R+^{M7}, R^{M7(#5)} $	R, M3, #5, M7
Major 6th	$ R^6, (6)m^7/R $	R, M3, 5, M6
minor 6th	$ Rm^{b6}, (b6)^{M7}/R $	R, m3, 5, m6
diminished 6th	$ Ro^{b6}, Rm^{b6(b5)}, (b6)^7/R $	R, m3, b5, m6
augmented 6th	$ R+^6, R^{6(#5)}, (6)m^{(M7)}/R $	R, M3, #5, M6
It6 augmented		bA, C, bG
Fr6 augmented		bA, C, D, bG
Ger6 augmented		bA, C, bE, bG
N6		F, bA, bD
9ths	$ R^9, R^{dom9} $	R, M3, 5, m7, M9
9ths	$ R^{M9}, R^{9(M7)} $	R, M3, 5, M7, M9
9ths	$ Rm^9 $	R, m3, 5, m7, M9
9ths	$ Rm^{9(M7)} $	R, m3, 5, M7, M9
9ths	$ Rm^{7b9}, Rm^{b9(7)} $	R, m3, 5, m7, m9
9ths	$ Rm^{7\sharp9}, Rm^{\sharp9(7)} $	R, m3, 5, m7, m10
9ths	$ R+^{M9}, R^{M9\sharp5} $	R, M3, #5, M7, M9
9ths	$ R+^{M7#9}, R^{M7\sharp9\sharp5} $	R, M3, #5, M7, m10
elevenths … and beyond	…	…

Altered Chords

• Altered chords take standard, easy-to-understand chords and alter them.

Name	Notation	Components
add9	$ R^2, R^{add9} $	R, M3, 5, M9
6/add9	$ R^{6/9}, R^{6/add9}	R, M3, 5, M6, M9

Suspended Chords

Name	Notation	Components
	$ R^{sus}, R^{sus4} $	R, 4, 5
	$ R^{sus2}, R^{add9 (no 3rd)} $	R, M2, 5

Power Chords

Name	Notation	Components
power chords	$ R^5, R^{(no 3rd)} $	R, 5