Notes that aren't in the chord · From Zero to Mozart

When you work out the harmony under a tune, you'll hit melody notes that aren't in the chord — and that's not a mistake in your analysis. Melodies are full of notes that pass through, lean in, or hang over the harmony on their way to a chord note. They're called non-chord tones, and they're what makes a melody a melody rather than a broken chord.

The four common ones

They're told apart by how you get to them and how you leave:

Name	Approached	Left	What it does
Passing tone	by step	by step, same direction	fills the gap between two chord notes
Neighbour tone	by step	by step, back where it came from	a quick step away and back
Suspension	held over from the previous chord	resolves down by step	a note that's late letting go
Appoggiatura	by a leap	by step, opposite direction	a leaning accented dissonance

See and hear them

Over a held C major chord (C–E–G), here is a melody line — the chord tones are C, E and G; everything else is passing through:

80 bpm

All eight notes over one C chord. C, E, G belong to the chord; D and F are passing tones — they step between chord notes and keep going the same way. Play it: the D and F sound fine because they don't stop, they pass.

A neighbour tone steps away and comes straight back:

80 bpm

E is the chord note. F is its upper neighbour, D its lower neighbour — each a quick step out and back. Very common as an ornament of a held note.

Why it matters for you

When you're reading the harmony of a line (that's a lesson later this stage), you'll be tempted to think you've got the chord wrong because a melody note doesn't fit. Check whether that note is passing between two notes that do fit, or leaning on its way to one. If so, the chord is right and the note is just decoration.

Try it

Try

Play the C-major arpeggio: C, E, G, then back down. Now play the C major scale: C, D, E, F, G, F, E, C. The scale is the arpeggio with passing tones filling the gaps. Every stepwise tune you know is built this way — chord notes with connective steps between them.

The usual mistake

Hearing a non-chord tone and "correcting" it — flattening a passing F to fit a C chord, say. Don't. The clash is brief and intentional; it resolves on the next note. If you smooth out every dissonance, the melody goes limp. The tension of a passing or leaning note against the harmony is a large part of what makes a tune expressive.