Project Sherlock

Music

Music Theory

The grammar of music — notation, scales, harmony and counterpoint — which described what composers did before it prescribed.

13 topics · 13 curated works

Topics

  • 01Foundations & Overviews1
  • 02Notation & Rhythm1
  • 03Scales & Modes1
  • 04Intervals1
  • 05Harmony1
  • 06Chord Progressions1
  • 07Voice Leading1
  • 08Counterpoint1
  • 09Form & Structure2
  • 10Modulation1
  • 11Analysis Techniques1
  • 12Jazz Harmony
  • 13Non-Western Tonal Systems1

Reading in Music Theory

13

A way in

  1. Start here

    No prior grounding assumed.

    The Story of Notation

    C. F. Abdy Williams · 1903

    Traces staff notation back through neumes and mensural signs, arguing that notation's odd conventions are fossils of performance problems each era…

  2. Then

    Assumes you know the vocabulary.

    Six Lectures on Harmony

    George Alexander Macfarren · 1867

    Delivered at the Royal Institution, argues that modulation is governed by the listener's sense of key relationship rather than by mechanical chord…

    +5 more at this level

  3. Go deeper

    Primary sources and full treatments.

    Gradus ad Parnassum

    Johann Joseph Fux · 1725

    Sets out species counterpoint as a graded pedagogy, arguing that mastering strict two-voice writing note-against-note is the necessary foundation for…

    +5 more at this level

12 of 13 works

Book1903

The Story of Notation

C. F. Abdy Williams

Traces staff notation back through neumes and mensural signs, arguing that notation's odd conventions are fossils of performance problems each era was trying to solve.

link failing as of 17 Sept 2026
Book1867

Six Lectures on Harmony

George Alexander Macfarren

Delivered at the Royal Institution, argues that modulation is governed by the listener's sense of key relationship rather than by mechanical chord substitution rules.

link checked 17 Sept 2026
FreeIntermediate
Book1889

Harmony: Its Theory and Practice

Ebenezer Prout

Codifies triadic harmony and figured bass into a graded system of rules and exercises that became the standard English-language harmony course for half a century.

link checked 17 Sept 2026
FreeIntermediate
Book1890

Counterpoint: Strict and Free

Ebenezer Prout

Teaches part-writing as a discipline of independent melodic lines kept consonant by rule, arguing that free counterpoint is strict counterpoint with its constraints relaxed one at a time.

link checked 17 Sept 2026
FreeIntermediate
Book1893

Musical Form

Ebenezer Prout

Analyses phrase, period, and the standard forms from binary to sonata as a shared architecture that later composers vary rather than abandon.

link checked 17 Sept 2026
FreeIntermediate
Book1725

Gradus ad Parnassum

Johann Joseph Fux

Sets out species counterpoint as a graded pedagogy, arguing that mastering strict two-voice writing note-against-note is the necessary foundation for free composition.

link checked 17 Sept 2026
Paper1885

On the Musical Scales of Various Nations

Alexander J. Ellis

Introduces the cents system for measuring pitch and uses it to show that the scales of different musical cultures are not approximations of one natural scale but genuinely different systems.

link checked 17 Sept 2026
Book1894

The Modes of Ancient Greek Music

David Binning Monro

Reconstructs the Greek modal system from primary sources and argues that medieval and later theorists systematically misapplied the Greek mode names to different scales.

link failing as of 17 Sept 2026
Book1998

Tuning, Timbre, Spectrum, Scale

William A. Sethares

Argues that consonance is not a fixed property of an interval but a relationship between a timbre's spectrum and the scale it is played in, so changing one lets a composer redesign the other.

In order written

1725 – 2006
  1. 1725Gradus ad ParnassumJohann Joseph Fux
  2. 1867Six Lectures on HarmonyGeorge Alexander Macfarren
  3. 1893Musical FormEbenezer Prout
  4. 1894The Modes of Ancient Greek MusicDavid Binning Monro
  5. 1903The Story of NotationC. F. Abdy Williams
  6. 1998Tuning, Timbre, Spectrum, ScaleWilliam A. Sethares
  7. 2006The Geometry of Musical ChordsDmitri Tymoczko

Elsewhere in Music