Music Theory Self-Study: The Complete Guide — Where to Start, How Not to Quit
Last updated: May 9, 2026 · Author: Kotaro Asahina (Founder of Kuon, Audio Engineer)
Quick Answer
Music theory can be self-studied, but the order matters. Recommended progression: 12-tone equal temperament (frequency ratio 2^(1/12)) → 24 major + 24 minor = 48 keys → functional harmony (T/D/S) → counterpoint in 5 species (Fux, 1725) → analysis. Standard textbooks include Walter Piston's "Harmony," Henri Challan's "380 Basses et Chants Donnés" (Alphonse Leduc), and the free Open Music Theory v2. Kuon covers this ground through its free Journal, its practice apps, and KUON AI.
Key Facts
- 12-TET semitone ratio
- 2^(1/12) ≈ 1.0595
- Major + minor
- 24 + 24 = 48 keys
- Functional harmony
- T / D / S (3 functions)
- Counterpoint
- 5 species (Fux)
- Major OSS textbook
- OMT v2
- Kuon Journal
- Free
- Kuon modules
- 16
- Self-study to mastery
- 3–5 years
Is music theory self-study really possible?
Conclusion: yes. Fundamentals (note names, intervals, scales, triads, seventh chords) can be acquired in 6 months to 1 year with a good textbook and a daily 15-minute habit. The intermediate level (functional harmony, cadences, modulation) takes 1–2 years; the advanced level (counterpoint, formal analysis, modern harmony) takes 2–3 years. Total: 3–5 years to reach conservatory-graduate-equivalent coverage.
Most people who quit do so for one of three reasons: skipping steps, never checking answers, or never connecting theory to actual music. Conversely, anyone who avoids those three pitfalls can reach the goal.
Three things to decide before you begin
Music theory is broad, so before starting it pays to clarify (1) genre, (2) goal, and (3) time allocation.
For time allocation, "15 minutes a day" is the minimum. Less than that and the brain forgets faster than it forms processing circuits. Research suggests that 15 minutes × 5 weekdays beats one hour each on the weekend for retention.
Foundation level: study order
The foundation is called music fundamentals. In Kuon, M0 and M1 cover this. Order:
- What is sound?: frequency, harmonics, timbre (Kuon M0-01)
- Notation: staff, clefs, note names (M1-01 to M1-07)
- Rhythm and meter: note values, time signatures, tuplets
- Intervals: perfect/major/minor/augmented/diminished, unison through octave (M1-09 to M1-10)
- Scales: major and minor (natural, harmonic, melodic), church modes
- Triads: major, minor, diminished, augmented (M1-12)
- Seventh chords: V7, II7, dim7, the tonic seventh, etc.
The goal at this stage is to identify and name every interval and chord in 12-TET on sight. Time required: 6 months to 1 year.
Intermediate level: study order
The intermediate level is functional harmony. Kuon's M4 covers it intensively.
- The three functions: T (tonic) / D (dominant) / S (subdominant)
- Cadences: authentic, half, deceptive, plagal (M4-04)
- Pre-dominant chords: V/V (secondary dominant), V/IV, etc.
- Non-chord tones: passing, neighbor, suspension, anticipation, escape
- Tonicization: temporary establishment of a key
- Modulation: common-chord and enharmonic modulation
- Voice-leading rules: avoidance of parallel 5ths/8ves, tendency tones
The traditional practical exercise is to work through Henri Challan's "380 Basses et Chants Donnés" (Alphonse Leduc, in 10 volumes) from number 1 in order. Time required: 1–2 years.
Advanced level: study order
Advanced study covers counterpoint, formal analysis, and modern harmony. Kuon's M2, M3, M5, M8, M9, and M14 cover these.
- Counterpoint species 1–5: following Fux's "Gradus ad Parnassum" (Kuon M2)
- 16th-century counterpoint: Palestrina style
- Fugue: Bach style (subject, answer, countersubject, stretto)
- Formal analysis: sonata form, rondo, theme and variations (Kuon M3)
- Chromaticism: modal mixture, Neapolitan, augmented sixth (Kuon M5)
- 20th-century techniques: pitch-class set theory, twelve-tone (Kuon M8, M9)
- Schenkerian analysis: hierarchical structural analysis (Kuon M14)
At this stage, a teacher's feedback yields the most efficient progress. Kuon's lessons follow the design principle of "presenting standard solutions while honoring the student's alternative as a valid musical choice" (CLAUDE.md §49 — founder's philosophy), so even self-learners can correct misunderstandings. Time required: 2–3 years.
Recommended books
Recommended online resources
- Open Music Theory v2 (OMT v2): the standard free textbook for North American music programs (edited by Mark Gotham, CC BY-SA 4.0).
viva.pressbooks.pub/openmusictheory - musictheory.net: free fundamentals drills
- teoria.com: ear-training and theory drills
- Coursera / EdX: university courses (Berklee, Yale, etc.)
- YouTube: 12tone, Adam Neely, Music Matters (English)
- Kuon Journal: free articles on theory, harmony and acoustics, in Japanese, English, German and Traditional Chinese
Three principles to avoid quitting
Roughly 80% of music theory self-learners do drop out, but the causes almost always reduce to three.
Study plan for conservatory entrance
Each conservatory has its own style — Geidai, Toho Gakuen, Musashino, Kunitachi, Tokyo College of Music, Senzoku Gakuen, Showa, etc. Always analyze 5 years of past papers from your target school.
Study plan for hobby composing
For hobby composing you don't need conservatory-level rigor. Priorities:
- Note names, intervals, scales, triads (this alone lets you write simple pieces)
- Functional harmony basics (T/D/S and V7) — write IV–V–I progressions
- Modulation and borrowed chords (add color to your songs)
- Genre-specific patterns (pop: II–V–I family; jazz: ii-V-I + tensions)
- Form (AABA, Verse-Chorus, sonata form — give your music structure)
With 15 minutes a day for one year, you can reach the level of writing simple but theoretically sound pieces. Kuon's chunked lessons (5–10 min each) are tuned to the pace of hobby learners.
Learning with the Kuon Journal
Kuon R&D publishes everything it knows about music theory, harmony and acoustics in the Journal — free, and open to anyone. Where reading is not enough, you can ask KUON AI at any time. KUON AI does not generate music; it never forces one interpretation on you, and the final choice returns to you.
Training apps for ear training, sight-singing, harmony, counterpoint and score analysis are available alongside it.
Frequently Asked Questions
Can music theory be learned through self-study?
Yes — self-study is fully workable. Fundamentals can be acquired in 6 months to 1 year of daily 15-minute practice with a good textbook. Intermediate and advanced topics (functional harmony, counterpoint, formal analysis) benefit greatly from a teacher's feedback, but a structured online platform like Kuon makes it possible to reach conservatory-graduate-equivalent coverage in 3–5 years.
Where do I start?
Use this order: (1) reading the staff and note names, (2) rhythm and meter, (3) intervals, (4) scales and keys, (5) triads, (6) seventh chords, (7) functional harmony (T/D/S), (8) cadences, (9) modulation, (10) counterpoint. The cardinal rule for not quitting is to build each step before moving on.
How long does music theory self-study take?
Fundamentals: 6 months to 1 year (15–30 min/day). Functional harmony: 1–2 years. Counterpoint and formal analysis: 2–3 years. Modern harmony and avant-garde techniques: 3–5 years. This roughly matches a four-year conservatory curriculum. Kuon covers the same scope through its free Journal and practice apps, so even self-study can aim at conservatory-equivalent coverage.
What books do you recommend?
Japanese standards: Ikeuchi Tomojiro, "Theory of Music — Theory and Practice" (Ongaku no Tomo Sha, 1962, still the standard textbook); Piston, "Harmony"; Dubois, "Treatise on Harmony"; Henri Challan, "380 Basses et Chants Donnés" (Alphonse Leduc, in 10 volumes); Fux, "Gradus ad Parnassum"; and Hasegawa Yoshio, "Counterpoint." Kuon's Theory Suite is built on the free Open Music Theory v2 textbook in addition.
What are the three principles to avoid burning out?
From Kuon's experience: First, "15 minutes a day" for 3 months (the minimum to build neural processing circuits). Second, always check your answers (the biggest pitfall in self-study is reinforcing wrong understanding). Third, anchor everything to real music (don't memorize theory as abstract symbols — apply it to actual works).
What is the study plan for conservatory entrance exams?
Two years out: complete fundamentals plus begin sight-singing and ear training. One year out: harmony (Challan numbers 1–200) and exam-style practice. Six months out: mock tests for full-scale practice and targeted weakness work. Each conservatory has its own style — analyze 5 years of past papers from Tokyo University of the Arts (Geidai), Toho Gakuen, Musashino, Kunitachi, or wherever you're applying.
What about study for hobby composing?
You don't need conservatory-level rigor, but at minimum cover "fundamentals + functional harmony + genre-specific idioms." For pop, focus on chord progressions and voicing; for jazz, ii-V-I and tensions; for classical, harmony plus formal analysis. Kuon's chunked lessons (5–10 minutes each) match the pace of hobby learners well.
What is 12-tone equal temperament?
Equal temperament divides one octave into 12 physically equal parts. The semitone frequency ratio is fixed at 2^(1/12) ≈ 1.0595. It is the standard tuning of Western music since Bach. The trade-off for being able to play in all keys equally is slight detuning relative to just intonation. Modern pianos, guitar frets, and electronic instruments are designed around this tuning.
What does "24 major + 24 minor = 48 keys" mean?
In 12-tone equal temperament, there are 12 major keys (C, C♯, D, …, B) and 12 minor keys, theoretically 24 + 24 = 48 keys total. In practice, enharmonic equivalents (e.g., C♯ = D♭) make some sound identical, so the count of distinct sonorities is often given as 12 + 12 = 24. Bach's "Well-Tempered Clavier" cycles through all 48 of the former.
What is T/D/S in functional harmony?
They are the three functions of chords in functional harmony. T = Tonic (rest), D = Dominant (tension), S = Subdominant (departure). In a major key, I = T, IV = S, V = D. Western classical music from the Baroque on is built on the alternation and elaboration of these three functions. The basic motion is "Subdominant → Dominant → Tonic (S–D–T)"; the IV–V–I of pop and jazz is rooted in the same theory.
What are the five species of counterpoint?
Traditional counterpoint, codified by Fux's "Gradus ad Parnassum" (1725), has five species. First: 1:1 (whole note vs. whole note). Second: 1:2 (two notes per beat). Third: 1:4 (four notes per beat). Fourth: syncopation. Fifth: florid counterpoint (a mixture of the above). It is the standard pedagogy for studying pre-Bach Renaissance style (16th century) and is still required curriculum at conservatories today.
What is special about Kuon's music theory course?
Kuon publishes its writing on theory, harmony and acoustics in a free public Journal. Alongside it you can use browser-based practice apps (ear training, sight-singing, harmony, counterpoint, score analysis) and KUON AI, which answers questions and does not generate music. The full set of production apps is unlocked by the Concerto plan (¥1,980/mo).
参考文献・出典
- Open Music Theory v2 (OMT v2)— Edited by Mark Gotham et al. — North American conservatory standard textbook (CC BY-SA 4.0)
- IMSLP — Free Music Library— Public-domain score archive — source material for analysis
- musictheory.net— Free fundamentals drills
- teoria.com— Ear-training + theory drills
- Tokyo University of the Arts (Geidai)— Japan's premier music education institution