Major Key (Leaving Cert Music): Revision Notes

Major Key

What is a Major Key?

A major key is a tonal framework based on the major scale, characterised by a bright and uplifting sound. It is widely used in melody writing, harmony, and composition.

Features of a Major Key

Scale Structure

• The major scale consists of 7 notes and follows this pattern of intervals:Tone - Tone - Semitone - Tone - Tone - Tone - Semitone.
• Example:
  • C Major: C-D-E-F-G-A-B-C
  • G Major: G-A-B-C-D-E-F#-G

Key Signature

• Identifies the sharps or flats used in the key.
  • Example:
  • C Major: No sharps or flats.
  • G Major: F#.

Tonality

• Built around the tonic (1st note of the scale) as the home note.
• Other important degrees:
  • Dominant (5th): Creates tension (e.g., G in C major).
  • Subdominant (4th): Prepares the resolution (e.g., F in C major).

Chords in a Major Key

• Common triads in a major key:
  • I (Tonic): The home chord (e.g., C in C major).
  • IV (Subdominant): Adds movement (e.g., F in C major).
  • V (Dominant): Resolves back to the tonic (e.g., G in C major).

How to Use a Major Key in Melody Writing

Choose the Key

• Select a major key suitable for the mood (e.g., G Major for bright melodies).

Establish the Tonic

• Start and end your melody on the tonic note or chord for a sense of grounding.

Use Stepwise Motion and Leaps

• Create a smooth melodic line by combining stepwise movement with occasional leaps.

Plan Cadences

• Use cadences to define phrases:
  • Perfect Cadence (V-I): Resolves the melody.
  • Imperfect Cadence (I-V): Adds tension.