Lesson 80 of 84 · Harmony
⭐ 30 XP🎼 Harmony HallJazz Chord Extensions (Part 3)
Quartal harmony stacks fourths instead of thirds (C-F-B-flat).
🎯 Your mission
Two notes together — does it feel calm or tense?
⚡ The twist
Major sounds bright. Minor sounds soft. Both are beautiful.
Listen for this
🎧 Pick out the lowest note. That's the bass — the foundation.
Artist Spotlight
🌟 Bach wrote so many harmonies he basically invented the rules everyone still uses.
Mind = Blown
🤯 Some cultures use scales with 22 notes — way more than the 7 you know.
Learn about jazz chord extensions (part 3): compare harmonic styles across genres
What You'll Learn
Quartal harmony stacks fourths instead of thirds (C-F-B-flat). It has an open, modern sound used in jazz and film.
Compare harmonic styles across genres
Use harmonic analysis to understand a piece
Check Your Understanding
Question 1 of 3
What is an interval?
Where you hear this in real life
The reason songs make you feel things is harmony doing its quiet job underneath.
Stretch Challenge
Try this in real life this week.
Listen to any song. Try to hear the bass line.
For the dinner table
“Play one song together. Talk about what feeling it gave you and why.”
Next Smart Lesson
We'll pick a music lesson that matches exactly where your ear is right now.
Share this music lesson
Send it to a parent who wants 5 minutes of music with their kid — no instrument required.
Ready?
Jazz Chord Extensions (Part 3)
Two notes together — does it feel calm or tense?
Full screen — no distractions
Checkout complete lesson on Harmony for 8th Grade
Get the full Harmony track as a printable PDF — all lessons, worksheets, and answer keys.