How to Learn Music Theory

Every concept in this track has a sound, and learning the name without the sound gets you a vocabulary you cannot use. A major third is a specific thing you can hear and recognise, not a definition about semitones.

The practical rule is never to learn a theory concept without hearing it in the same session. Play it, sing it, find it in a song you know. Interval training in particular repays a few minutes a day far more than an hour of reading, because it turns theory from knowledge into perception.

Pitch gets the attention and rhythm causes more practical problems. Separating the beat from the rhythm is the first genuinely technical distinction in music and the one most often skated over.

The beat is steady; the rhythm varies over it. You can tap the beat of a song while the melody does something entirely different, and holding those independently is a physical skill that improves with practice. Clapping rhythms while tapping the beat with a foot is unglamorous and works.

Time signatures follow from this. The top number is how many beats in a bar and the bottom is what kind of note gets one. It is not a fraction, and reading it as one causes lasting confusion.

Guitarists in particular tend to learn chords as hand shapes, which works for a while and then stops. The shape tells you where to put your fingers and nothing about why the chord sounds as it does or what would happen if you changed one note.

Learning chords as stacked intervals fixes this. A major triad is a root, a major third and a perfect fifth. Lower the third by a semitone and you have a minor triad, and that single semitone accounts for most of the emotional difference people hear. Once chords are built rather than memorised, extended and altered chords stop being new information.

Plenty of accomplished musicians read poorly or not at all, and entire traditions transmit music without notation. It is not a prerequisite for musicianship.

It is extremely useful for particular jobs: playing music nobody can teach you by ear, communicating precisely with other musicians, and analysing something too complex to hold in your head. Learn it for those reasons rather than out of obligation, and the motivation problem largely disappears.

The one confusion worth pre-empting: the same written note means different pitches in different clefs, which is exactly what clefs are for.

Theory sticks when applied to music you have chosen. Take a song you know well and work out what is happening: what key, what chords, where it modulates, why the chorus lifts.

This is more motivating than exercises and it teaches more, because you already know how the music feels and you are discovering the mechanism behind a feeling you have. That is a much stronger memory than learning the mechanism first.

Theory can look like arbitrary conventions until you know when and why each arrived. Equal temperament is a compromise adopted for practical reasons. Sonata form is a set of expectations composers then played against. Rules about parallel fifths describe a particular period's taste rather than a law of sound.

Knowing which rules are physics and which are fashion is the difference between following theory and understanding it.

The most common regret among people who learned an instrument is that they avoided theory for years believing it would get in the way of playing. Almost nobody who learned it reports that it did.

Start with rhythm and intervals. Those two carry more of the subject than anything else, and both are ear skills before they are page skills.