Resource 10 of 14Book 1
QR-B1-010
Six Chord Qualities
Demonstration + Ear7–10 min
Objective
Demonstrate the six chord qualities used in Book 1.
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Focus
“Six chord qualities can be organised by six simple O-codes.”
Decode
- 01Same-root comparisons of all six qualities.
- 02A short ear drill across the six sounds.
- 03Correct spelling of each chord.
- 04Double accidentals are reference-awareness only at this stage.
Chord Quality Codes
| Quality | O-Code | Semitones | Degrees |
|---|---|---|---|
| Major | O3 | O2 | 4 | 3 | 1 – 3 – 5 |
| Minor | O2 | O3 | 3 | 4 | 1 – b3 – 5 |
| Diminished | O2 | O2 | 3 | 3 | 1 – b3 – b5 |
| Augmented | O3 | O3 | 4 | 4 | 1 – 3 – #5 |
| Sus2 | O1 | O4 | 2 | 5 | 1 – 2 – 5 |
| Sus4 | O4 | O1 | 5 | 2 | 1 – 4 – 5 |
Practise Now
- 01Play all six qualities from one root note, in order.
- 02Identify four ear examples by quality.
What you should be able to do
You can build and recognise the six Book 1 chord qualities from any root, with correct spelling.
Return to the Book
Student Handbook — Chapters 10–12
Close the resource, return to this page in the book and practise the pattern.