Scales Around the World — Not Just Twelve-Tone Equal

The piano is a choice, not a law

The piano has 88 keys, the black ones in neat rows — so most people assume pitches are simply "arranged that way". Twelve-tone equal temperament is one choice among many, and a young one.

The victory of equal temperament

Its central claim is simple: all semitones are equal, so any key can modulate freely — and orchestral tonality could settle in the nineteenth century.

Its status today comes from practical victory: the piano spread, keyboards became standard, free modulation became a basic assumption of composition.

But the "standard" is young

An overlooked fact: equal temperament spread in the West only in the nineteenth century.

Before that, just intonation (pure thirds and fifths as far as possible) and other schemes gave purer overtones but made modulation hard. Bach's "well-tempered" pianos were not truly equal-tempered — true equal tuning was promoted later by piano tuners.

In other words: the "standard" you grew up with is a scheme chosen jointly by industry and aesthetics.

Other systems

Pentatonic and modal scales: the base organisation across much of the world (see Major Scale);

The so-called "Solomonic" family: a branch of church modes using non-equal pitches (example 1);

Microtonal practice: some traditions use units smaller than a semitone so that particular melodic vocabularies work;

Georgian, Middle Eastern, East Asian systems: each with its own scale combinations and accompaniment logic.

They are not "impure equal temperament" but different answers to different questions.

A distinction worth making

Tuning: exactly which pitches — the same piece's "standard pitch" can differ by tens of cents;

Scale/mode: how melodies are organised from those pitches.

The world's musical diversity lives mostly in the second, yet what sounds "off" to outsiders is often the first — which is why the same key sounds different on different instruments.

Practical implications

Listening to world music: accept that tuning and interval widths may differ before judging the melody;

Reading scores: when non-equal pitches are notated for piano, accidentals become imprecise — a limit of notation, not an error in the music;

Playing world music on a keyboard: the piano can play most melodies, but accompaniment habits carry "Western ears" along (see oral and written).

Listen: a "microtonal" interval

Hear this interval — a "wide major second" common in many non-equal systems. In their music this is not "out of tune" but "correct".

The reference frame: Major Scale.

Separating "tuning" from "scale": Concert Pitch — how the pitch anchor is set.

Where modes sit in theory: Melody.

The practical problem of playing world music: the tuning system of the guqin.

Listen in the library

Hora Agadati (Bm)C10:32An Agadati hora — the so-called Solomonic family, pitch organisation outside Western modesDetailsLamentation (2-91) S. 265C10:29A medieval lamentation — the scale behind Gregorian chant, ruling the West for a millennium before equal temperamentDetailsLamento, Op.23C16:53A nineteenth-century Romantic miniature — piano tuning settled only in the 1800s, so today's standard is youngDetails

All tracks from midicn-lib — inline badge is the license tier (C1 commercial / C2 non-commercial / C3 study only).

Sources

"音阶体系"的具体音高比例在不同传统间差异很大，本文只述"存在多种体系"这一事实层面，不给出具体音分数据
涉及的曲目均标注来源与许可档位，可在线试听

Used for fact-checking only; all prose is original.

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