Basics5 MIN READ

Introduction to Notation, Scales, and Modes

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Robbie RochausAuthor
February 23, 2025Published

Introduction to Notation, Scales, and Modes

The Language of Music

To communicate complex musical ideas accurately, we must understand standard notation, the interval formulas that build scales, and how modes allow us to shift tonal centers. This framework is essential for reading charts, communicating with non-guitarists, and improvising.

1. Standard Musical Notation

While guitar tablature shows where to put your fingers, standard notation shows the actual pitch, duration, and rhythm of the music.

  • The Staff and Clefs: Music is written on five horizontal lines. The Treble Clef (G-clef) is used for guitar and indicates higher registers. The Bass Clef (F-clef) is used for bass instruments.
  • Pitch and Ledger Lines: Notes moving up the staff indicate a rising pitch. When notes exceed the five lines, we use short temporary lines called "ledger lines" to extend the staff.
  • Rhythmic Values: The visual shape of a note dictates its duration.
    • Whole Note: 4 beats.
    • Half Note: 2 beats.
    • Quarter Note: 1 beat.
    • Eighth Note: 1/2 beat.

2. The Architecture of Scales

Scales are not shapes on a fretboard; they are mathematical formulas of intervals—specifically Whole Steps (W = 2 frets) and Half Steps (H = 1 fret).

  • The Major Scale: The foundation of Western harmony.
    • Formula: W - W - H - W - W - W - H
    • Example (C Major): C (W) D (W) E (H) F (W) G (W) A (W) B (H) C
  • The Natural Minor Scale: * Formula: W - H - W - W - H - W - W
    • Example (A Minor): A (W) B (H) C (W) D (W) E (H) F (W) G (W) A

3. Understanding the Diatonic Modes

A mode is simply a major scale played from a different starting note, shifting the "tonal center" or "home base." Because a major scale has seven notes, it yields seven modes.

Let's use the notes of C Major (C-D-E-F-G-A-B) to illustrate. The notes remain the same; only the starting degree changes.

| Mode Name | Starting Degree | Formula (Compared to Major) | Sound/Application | | :--- | :--- | :--- | :--- | | 1. Ionian | 1st | 1-2-3-4-5-6-7 | The Major Scale. Bright and resolved. Used over Major 7 chords. | | 2. Dorian | 2nd | 1-2-b3-4-5-6-b7 | Minor scale with a natural 6th. Foundational minor sound. Used over minor 7 chords. | | 3. Phrygian | 3rd | 1-b2-b3-4-5-b6-b7 | Minor scale with a flat 2nd. Dark, Spanish or Flamenco flavor. | | 4. Lydian | 4th | 1-2-3-#4-5-6-7 | Major scale with a sharp 4th. Dreamy, floating. Avoids the clash of a natural 4th over Maj7 chords. | | 5. Mixolydian | 5th | 1-2-3-4-5-6-b7 | Major scale with a flat 7th. Bluesy, driving. Definitive for dominant 7 chords. | | 6. Aeolian | 6th | 1-2-b3-4-5-b6-b7 | The natural minor scale. Melancholic and dramatic. | | 7. Locrian | 7th | 1-b2-b3-4-b5-b6-b7 | Minor scale with flat 2 and flat 5. Unstable. Used over half-diminished (m7b5) chords. |

The Golden Rule for Modes: Do not think of D Dorian simply as "C major starting on D." Learn its specific formula (minor with a natural 6th) so you can build Dorian from any root note immediately, independent of its parent major scale.

4. Jazz Harmony Foundations: Extensions, Added Tones, and Suspensions

As you move into jazz and advanced theory, we stop thinking only in 3-note triads. We begin adding "color" notes to create more complex harmonic textures. It is vital to distinguish between notes that stack on top of a chord and notes that replace parts of a chord.

| Category | Typical Intervals | Notation Example | Requirement | Function | | :--- | :--- | :--- | :--- | :--- | | Extensions | 9, 11, 13 | $Cmaj9$, $G13$ | Assumes a 7th is present | Adds "color" or "tension" without changing identity. | | Added Tones | add2, add4, 6 | $Cadd9$, $C6$ | Added to a basic triad (no 7th) | Provides a "cleaner" but rich sound (Pop/Folk). | | Suspensions | sus2, sus4 | $Csus2$, $Csus4$ | Replaces the 3rd | Removes Maj/Min identity; creates a need to resolve. |

1. Extensions (9, 11, 13)

In jazz and formal theory, these are called Upper Extensions.

  • The Rule: You use these numbers when the note is added above the 7th.
  • Notation: You’ll see them in names like $Cmaj9$, $G13$, or $Am11$.
  • The Requirement: Usually, for a note to be called an "extension," the chord is assumed to already have a 7th in it.

2. Added Tones (add2, add4, add6)

These are called Added Tones (or "Add" chords).

  • The Rule: You use these when you add the note to a basic triad (Root, 3rd, 5th) without including a 7th.
  • Example: A $Cadd9$ ($C, E, G, D$) sounds very different from a $Cmaj9$ ($C, E, G, B, D$) because the $B$ (the 7th) is missing. This creates a much more stable, "folkier" sound.

3. Sus Chords (Sus2, Sus4)

These are called Suspensions.

  • The Rule: You use "2" or "4" when the note replaces the 3rd.
  • The Function: Because the 3rd is gone, the chord is neither major nor minor—it’s "suspended" in mid-air and wants to resolve back to the 3rd.
  • Notation: $Csus2$ ($C, D, G$) or $Csus4$ ($C, F, G$).