Lesson 78 of 84 · Harmony
⭐ 30 XP🎼 Harmony HallCounterpoint and Bach (Part 3)
Chord extensions (9ths, 11ths, 13ths) stack additional thirds above seventh chords, creating the lush sounds of jazz.
🎯 Your mission
Stack the sound. Find the sweet spot.
⚡ The twist
If your ears think it sounds 'off' — that's the harmony asking to resolve.
Listen for this
🎧 Listen for the SECOND voice underneath the main one.
Artist Spotlight
🌟 The Beatles' three-part harmonies were so tight they sounded like one voice.
Mind = Blown
🤯 Your brain can hear an out-of-tune note even if you've never had a music lesson.
Learn about counterpoint and bach (part 3): understand voice leading principles
What You'll Learn
Chord extensions (9ths, 11ths, 13ths) stack additional thirds above seventh chords, creating the lush sounds of jazz.
Understand voice leading principles
Compose a simple chord accompaniment
Check Your Understanding
Question 1 of 3
What does 'consonant' mean in music?
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.
Checkout complete lesson on Harmony for 8th Grade
Get the full Harmony track as a printable PDF — all lessons, worksheets, and answer keys.