Learning through practice
Study the lesson
Each lesson explains the concepts with audio examples, summary tables and stories about the great composers.
Practise with the quiz
Random questions drawn from a pool of 90+ per lesson — identification, construction, analysis from Bach to Radiohead.
Complete the exercises
Place notes on the SATB staves, choose the right inversions, analyse the masters' styles. The engine validates your choices instantly.
Progress
48 lessons, 24 keys, 5 levels. From the basic scale to the compositional techniques of the great masters.
Everything you need to progress
48 structured lessons
From the acoustic origins of the scale to the techniques of the great composers — five progressive levels covering classical harmony, jazz, impressionism and composition.
Interactive SATB exercises
Place notes on the staves voice by voice. Harmonic validation detects parallel fifths, voice crossings and range errors in real time.
Immediate feedback
Every note you place is analysed against the rules of tonal counterpoint. You learn from your mistakes the moment you make them.
High-quality audio
High-fidelity sampled piano. Hear every chord, every progression, every voicing — from Bach's cadences to jazz tritone substitutions.
24 keys
A complete reference page: scales, key signatures, diatonic chords, functional tritones and mnemonics for all 12 major and 12 minor keys.
6 languages
Français, English, Español, Deutsch, Português, Italiano. Harmonia is built for musicians everywhere.
5 progressive levels
From tonal foundations to contemporary harmony — informed by the major treatises (Dubois, Piston, Schoenberg, Aldwell)
Tonal foundations
- Scales & degrees
- Building chords
- Harmonic functions
- Cadences & punctuation
Advanced writing
- Advanced modulation
- Secondary dominants
- Altered chords
- Chromaticism
Structural analysis
- Functional analysis
- Musical forms
- Schenkerian reduction
- Bach → Wagner
Extended harmony
- Modality
- Impressionism
- Polytonality
- Jazz extensions
Specialisations
- Fugue & Bach style
- Music for picture
- Advanced jazz
- Schenkerian analysis
Free, no strings attached
Access to knowledge should not depend on what you can afford.
Harmonia was born in a classroom, not in a business plan. The 48 courses, the 850 corrected exercises and the 48 repertoire pieces analysed bar by bar are open to everyone, with no subscription and no credit card: students, teachers, self-taught musicians, the merely curious.
Building and hosting such a tool does cost money. That cost is covered by the institutions that take a licence for their classes, and by the people who choose to contribute. Never by advertising, never by selling data, never by holding a chapter hostage to force a payment.
Students, teachers, self-taught musicians
Conservatoires, music schools, secondary schools
The one exception to free access: the features that rely on artificial intelligence. Every request has a real cost that we cannot absorb for nothing.
Everything you want to know
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music
Every course is open. No credit card. Start now.
Start for free →All 48 courses · Unlimited quizzes · 850+ SATB exercises