Music Harmony: Building the Sound
Like Duolingo, but for Music Harmony: Building the Sound. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
For the part of you with thirty open tabs that never became anything.
20 levels across 3 sections, about 40 minutes end to end, roughly 8 days at five minutes a day. It moves through Making it Work, Noticing and Judging Quality, and Real Situations and Choices. It starts from scratch.
Free forever · No credit card · iPhone & Android

Key ideas in Music Harmony: Building the Sound
- Harmony requires at least two notes sounding simultaneously
- A single note played alone is melody, not harmony
- The physical distance between notes dictates the emotional response
- Different intervals have distinct, recognizable 'moods'
- Distinguishing harmony from melody
- Associating specific intervals with their emotional character
- Consonance provides a sense of rest and arrival
- Dissonance creates musical 'gravity' or tension that needs to resolve
- The Perfect Fifth is the most stable interval after the octave
- Identifying the functional difference between consonance and dissonance
- It provides a strong foundation that sounds 'right' to almost every ear
- The brain retains the sound of the first note while the second is playing
- Arpeggios or broken chords create harmony over time
- Recognizing the role of the Perfect Fifth in musical structure
- A triad consists of exactly three distinct notes
- Triads are the primary harmonic structure in most popular music
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives Music Harmony: Building the Sound the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
Picture a lone flute player performing a long, beautiful note in a quiet hall. What is this single sound called?
Get it right to open this lesson and 19 more in the app.
Where Music Harmony: Building the Sound takes you
Learn how notes work together to create emotion, tension, and the 'hit song' sound. This course focuses on practical chord building and common mistakes that make music sound muddy.
- 1
Making it Work
- The Power of Two Notes
- The Magic Three-Note Chord
- 2
Noticing and Judging Quality
- Major vs. Minor Moods
- The Home Base and Key
- 3
Real Situations and Choices
- Chords that Move
- Adding Flavor with Sevenths
- Common Mistakes and Fixes
3 sections · 7 units · 20 levels. Built to play, not to enroll.
You pick the voice
Music Harmony: Building the Sound is taught in the The Storyteller style: every lesson is a story. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
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Start Music Harmony: Building the Sound today.
Download Tomo, search Music Harmony: Building the Sound, and play your first lesson in under a minute.