Writing melody over a chord progression

Chord tones vs non-chord tones

On any given chord, the notes from that chord’s spelling are chord tones: 1, 3, 5, (and 7).

Notes from the key but not in the current chord are non-chord tones — they create momentary tension.

Universal melodic rule:

Land important notes on chord tones. Pass through non-chord tones.

“Important” notes are: the first note of a phrase, the last note of a phrase, notes on strong beats (1 and 3 in 4/4), and any held / long-duration notes.

A worked workflow

Suppose your progression is C - Am - F - G (one chord per bar in 4/4):

Bar 1 (C chord) — choose your bar-1 note from {C, E, G}. Let’s pick E. Bar 2 (Am chord) — choose from {A, C, E}. Pick A (jumps up to land on the chord root — strong). Bar 3 (F chord) — choose from {F, A, C}. Pick C (we already have an A from bar 2; C is the leap target). Bar 4 (G chord) — choose from {G, B, D}. Pick D (sets up resolution).

Now you have four landing pitches: E - A - C - D. Fill in the rest by stepwise motion between them.

Result melody (one option):

Bar 1: E F G E Bar 2: A G A B Bar 3: C B A G Bar 4: D E D B → resolve to C on the next chord change

Every strong beat lands on a chord tone of the current chord. The “in-between” notes are scale notes that pass between them.

Types of non-chord tone

Each has its own classical name and use:

Type	Description
Passing tone	A scale note between two chord tones; passes through quickly.
Neighbour tone	Steps away from a chord tone and back.
Suspension	A chord tone from the previous chord held over the new chord, then resolving down by step.
Anticipation	A chord tone from the next chord played early.
Appoggiatura	A leap to a non-chord tone, then a step resolution.

The first two are 90% of your toolkit. The others are flavoring.

Tension and release across the melody

Within a phrase, build up to a moment of tension (a non-chord tone or a high pitch) and then resolve.

The most common “tension-resolution” microscopic pattern: leading tone (7) → tonic (1). In the key of C, that’s B → C. Many melodies linger on B as the final tension before snapping home to C. This works because the leading tone is one half-step below the tonic — maximum gravitational pull, minimum distance.

Vocal vs instrumental melodies

For vocal melodies:

• Stay within a singable range (about an octave and a half max).
• Match the rhythm of the lyrics — the stressed syllables should land on strong beats and chord tones.
• Leave breath room — phrase endings need rests for singers to breathe.

For instrumental melodies (guitar lead, solo):

• You have more range to work with — use it.
• Long sustained notes are fewer; faster motion is fine.
• But — resist filling every beat. The same “leave space” rule applies.

Try this

Take C - G - Am - F (a famous I-V-vi-IV in C). For each bar, pick one chord tone as the bar’s “landing note”. Choose so that your four landing notes form a melodic contour (e.g. up, up, down, down).

Now improvise (or write) a melody where each bar’s first beat lands on its chosen landing note, and the rest of the bar passes between with stepwise motion in C major.

What you’ve just done is the basic procedure that every great songwriter goes through — consciously or not — when writing a vocal melody over a chord change.