Video Summary - The Complete Guide to Chords In Music

Main ideas and lessons

Chords create harmony and emotional character. A melody alone can feel “lonely,” but adding chords can make music sound happy, sad, jazzy, confusing, or “complete.”
Chord names/symbols/numbers are a communication system.
- Chord symbols and numbers relative to a key let musicians quickly “chunk” large amounts of harmony information.
- Each chord name/symbol encodes a specific set of notes (a pattern of intervals).
All chords are variations of simple building patterns. Even very “crazy” chords can be understood as combinations of more basic interval structures.
Learning chords without prerequisites is like playing a board game without rules. Missing knowledge makes the task harder and confusing.
Chord “anatomy” (structure) matters:
- Most chords follow a “snowman” shape of stacked thirds.
- Chord spelling is based on interval relationships from the root.
Inversions/voicings change what you hear but not what the chord is (the notes/interval content is the same).
Chords relate directly to scales: stacking thirds within a key’s scale yields the basic chords of that key, and chord qualities follow predictable order across keys.
Chord quality is mostly about triad construction, then extended by adding more notes (4-note, 5-note/9, 11, 13, etc.).
Chord symbols can be deciphered by “doing what it says”: understand the base chord, then apply additions, suspensions, extensions, alterations, and slash-bass instructions.

Methodology / conceptual “instructions” presented (detailed)

A) How chord names/symbols map to notes

Treat a chord symbol as specifying:

Root (the bottom note of the stacked-thirds “snowman” shape).
Chord quality (interval structure from the root to other chord tones).

How to use it:

Count intervals from the root to name/identify each other chord tone.
Most chords include root, third, and fifth.
If more tones exist, continue the stacked-third pattern upward.

B) How to identify a chord from a pile of notes (the “first step”)

Mentally rearrange notes into root-position “snowman” shape (stacked thirds).
Find the root (the base of that rebuilt structure).
Determine how the other notes relate to the root by intervals.

C) How to handle inversions and voicings

A chord can be rearranged/spread out, but:
- It remains the same chord if it contains the same set of intervals/notes (even if reordered).

Inversion rules (for triads; then generalized):

Root position: root on bottom.
1st inversion: third on bottom.
2nd inversion: fifth on bottom.

For larger chords: which note is on the bottom determines inversion (regardless of how other notes are voiced).

D) How chord qualities arise from scales

In a key (example: C major), take the major scale and stack thirds to produce the key’s basic triads.
Major-scale chord qualities occur in a consistent order by scale degree:
- Major chords: 1, 4, 5
- Minor chords: 2, 3, 6
- Diminished chord: 7

This scale-based pattern supports:

Faster learning of songs
Better sight reading
Easier transposition

Chord types covered (organized list)

1) Three-note chords (triads) — “six of them”

Major triad

“Default” concept: major third + perfect fifth above the root.

Minor triad

Same as major triad but with a lowered third.

Diminished triad

lowered third + lowered fifth.

Augmented triad

major third + raised fifth.

Suspended triads (“sus” chords) — replace the third

sus2: replace third with a major second above the root.
sus4: replace third with a perfect fourth above the root.

Named “suspended” because they’re often followed by chord motion where the sus note resolves to the third:

sus2/sus4 typically resolves to major/minor third afterward.

2) Two-note chords

Power chords

Essentially an open fifth (not inherently major/minor/other quality).
In common practice, two-note “chords” are generally treated as intervals rather than full chord qualities.

3) Four-note chords (7th chord family and more)

General idea: add a fourth note to existing triads → more permutations.

Seven chords (major/minor/diminished variants)

A triad + a 7th (major/minor/diminished):

Major 7: major triad + major seventh
Dominant 7: major triad + minor seventh (major seventh lowered by a semitone)
Minor 7: minor triad + minor seventh
Half-diminished (m7♭5): minor 7 with a lowered fifth
- equivalently: diminished triad + minor seventh
Diminished 7: diminished triad + diminished seventh
Minor major 7: minor triad + major seventh
7♯5 (sharp five):
- can be thought of as augmented triad + minor seventh
- or as dominant chord with a raised fifth

(Also mentioned as theoretically possible but rare)

Diminished major 7: diminished triad + major seventh
Augmented major 7: augmented triad + major seventh

Six chords (4-note variety)

Major/minor triad + 6th (major or minor 6th)
Examples:
- Major 6
- Major ♭6
- Minor 6
- Minor ♭6

Note: six chords are inversions of other seven chords (e.g., major 6 ↔ minor 7 in 1st inversion), but composers may still use the name.

Add nine chords (add9)

Usually a major add9 or flat9 variation.
Constructed as: triad + added ninth (without implying a seventh unless specified).

Explicitly:

add9 ≠ 9 chords
- 9 chords imply a seventh present
- add9 chords are just triad + ninth

Sus versions applied to “basically any chord going forward”

Replace the third with:
- major second (sus2) or
- perfect fourth (sus4)
Special case:
- sus2 sus4 (both present; rare)

6/9 chords

Major/minor triad + both major 6 and 9.

4) Slash chords

Format: [Chord] / [Bass note]
Meaning:
- chord tones correspond to the part before the slash,
- the note after the slash is the bass note (may or may not be part of the chord).

Common usage:

often describes an inversion (e.g., “E minor over B” style description).

5) 9, 11, 13 chords (extensions)

Extensions add upper chord tones for harmonic color:

Major 9 / perfect 11 / major 13

Construction pattern:

9 chords: like 7 chords + major ninth
11 chords: like 9 chords + perfect 11
13 chords: like 11 chords + major 13

Common-practice note:

Major or dominant 13 chords usually omit the 11 because it can clash/disagree with the chord’s third.

6) Altered extensions (dominant-family emphasis)

Alterations that may appear:

♭9, ♯9, ♯11, ♭13

How to interpret:

They sit on top of a normal dominant chord.

Examples:

7♭9 = dominant chord + minor ninth
7♯9 = dominant chord + augmented ninth
♯11: major ninth implied, plus augmented 11th
♭13: major ninth implied, plus flat 13th

Parentheses usage:

Altered-extension chords are written with parentheses to avoid ambiguity between:
- what is the root,
- what is the chord quality,
- what extensions/alterations apply.

Rationale:

complex symbols could otherwise be misread (e.g., confusion like “B♭9” vs “B♭ 9” interpretation).

Learning approach recommended

Don’t learn everything at once. Start with: 1) patterns in three-note (triad) chords 2) move to four-note (sevenths/sus/add/six/6/9) chords 3) then proceed to extensions (9/11/13, alterations)
If it feels overwhelming:
- pause, practice, return and rewatch—understanding grows each time.

Resources and product mentions (non-instructional, informational)

Mentions a chord syllabus (available to channel members / Patreon) including:
- every chord in the video in all keys
- occurrence of chord qualities in major and harmonic minor scales
Mentions a product called The Decoder by Noisy Clan:
- a “circle of fifths”-based tool to view key signatures and chord sets
- includes a related book and accessories
- discount code Brad15 for 15% off
Mentions a discount code and that it applies to multiple products.

Speakers / sources featured

Brad Harrison (main presenter; speaks throughout)
Noisy Clan (company/product source: “The Decoder”)
Mike Wark (special thanks)
Patrick McGrorty (special thanks)
Joe Nardacci (special thanks)

The Complete Guide to Chords In Music

Key takeaways