Chord Tone
In the Chord
A note that belongs to the currently playing chord — specifically the root, 3rd, 5th, or 7th. The harmony catches and supports this note. It feels grounded within the chord, regardless of its key stability.
Non-Chord Tone
Outside the Chord
A note that does NOT belong to the currently playing chord. The harmony doesn't catch it — it floats above the triad. Depending on its key stability, this creates color, tension, or dissonance.
C Major Chord (DO · MI · SO) — Which Notes Are Chord Tones?
| Note |
Solmization |
In C Major Chord? |
Role in Chord |
Zone Over C |
Feels Like |
| DO (C) |
Home · Rank 1 |
✓ Chord Tone |
Root (1st) |
Zone 1 Sweet |
Fully resolved, grounded |
| MI (E) |
Sweet · Rank 3 |
✓ Chord Tone |
Major 3rd |
Zone 1 Sweet |
Warm, melodically bright |
| SO (G) |
Strong · Rank 2 |
✓ Chord Tone |
Perfect 5th |
Zone 1 Sweet |
Confident, stable open |
| RE (D) |
Open · Rank 5 |
✗ Non-Chord Tone |
— |
Zone 4 Bitter |
Searching, unresolved |
| FA (F) |
Tension · Rank 7 |
✗ Non-Chord Tone |
— |
Zone 4 Bitter |
Maximum ache, needs resolution |
| LA (A) |
Warm · Rank 4 |
✗ Non-Chord Tone |
— |
Zone 3 Float |
Airy, added color (6th extension) |
| TI (B) |
Leading · Rank 6 |
✗ Non-Chord Tone |
— |
Zone 4 Bitter |
Major 7th color — edgy and active |
How RE Changes Zone Depending on the Chord
| Melody Note |
Chord Playing |
Chord Tones |
RE Is… |
Zone |
Feels Like |
|
RE
|
C major |
DO · MI · SO |
Non-chord tone |
Zone 4 Bitter |
Searching, unresolved tension |
| G7 (SO-TI-RE-FA) |
SO · TI · RE · FA |
Chord tone (5th) |
Zone 2 Tense |
Supported but still pulling forward |
| Dm (RE-FA-LA) |
RE · FA · LA |
Chord tone (root!) |
Zone 2 Tense |
Grounded in that chord — the anchor |
| Am (LA-DO-MI) |
LA · DO · MI |
Non-chord tone |
Zone 4 Bitter |
Adds dark color above the minor chord |
Quick Zone Finder — Two Questions, One Zone
Stable key degree + Chord Tone
Zone 1
Sweet / Grounded — fully resolved
Unstable key degree + Chord Tone
Zone 2
Tense / Supported — forward motion
Stable key degree + Non-Chord Tone
Zone 3
Floating / Modern — airy color
Unstable key degree + Non-Chord Tone
Zone 4
Bitter / Edgy — maximum tension
The rule: Is it in the chord? Is it a stable scale degree? Answer both questions → find your zone. The same note can live in any zone depending on what chord is playing.