Melody & Scales

A collection is not yet a tune

A scale puts selected pitches in order. A melody chooses pitches, durations and patterns of repetition from a collection or moves beyond it. Playing every note of a scale is one possible sequence, but a melody may repeat a single pitch, skip notes or pause. Its contour describes its upward and downward shape; intervals say more precisely how far it moves.

For the examples here, use the twelve equally spaced semitones of common Western equal temperament. A semitone is one step in this system; a whole tone is two. An octave spans twelve semitones. This is one useful pitch system, not a rule that every musical culture uses the same collection or tuning.

Worked example: build the pattern before naming it

Write these semitone positions on paper: C = 0, D = 2, E = 4, F = 5, G = 7, A = 9, B = 11, and the next C = 12. The successive gaps are 2, 2, 1, 2, 2, 2, 1. That ordered pattern builds a major scale. The final C is an octave above the first; it is not the identical pitch.

Take an invented four-note phrase C–D–E–G. Its gaps are +2, +2 and +3 semitones. Starting two semitones higher gives D–E–F-sharp–A, at positions 2, 4, 6 and 9. Subtract adjacent values: the gaps remain +2, +2, +3. Simply writing D–E–F–A would change the second gap to one semitone, so it would not preserve this phrase exactly.

Contour is useful, but less specific

Both C–D–E–G and C–D–E–F rise at every step. They share an upward contour but have different final intervals. If a game needs an easily recognisable three-note signal, you might compare whether the rhythm, the interval pattern or the final destination makes it distinctive. Write the comparison before claiming that one feature caused recognition.

A scale name does not guarantee an emotion. The same notes can be played with different rhythm, register, texture and context. Major does not mean every listener must feel happy, and an unfamiliar collection is not a failed version of a familiar one.

Represent the idea in a way you can use

You can investigate melody with letter names and numbered steps instead of staff notation or sound. Keep a key beside the drawing, state which tuning model you are assuming, and distinguish a pitch from its position in a pattern. If you later use an instrument, its tuning and range may add further choices; the paper comparison remains a complete investigation on its own.