12-tone equal temperament

• CURIE: gmeow:tuningSystem12EDO
• IRI: https://blackcatinformatics.ca/gmeow/tuningSystem12EDO
• Category: individual
• Defined by: gmeow:slices/music
• Box roles: ABox role (What is this?)

The Western common-practice equal division of the octave into 12 semitones. One TuningSystem among many (Principle 9).

Structure

Types: gmeow:TuningSystem

Practical Pattern

Use gmeow:tuningSystem12EDO as a controlled value typed as gmeow:TuningSystem.

Example Snippets

These snippets are generated from canonical slice examples and trimmed to the Turtle blocks where this term appears.

Score As Lossy Projection

• Source: slices/extensions/music/examples/score-as-lossy-projection.ttl
• Examples catalog: open in catalog#example-slices-extensions-music-examples-score-as-lossy-projection

# SPDX-FileCopyrightText: 2026 Blackcat Informatics® Inc. <paudley@blackcatinformatics.ca>
# SPDX-License-Identifier: CC-BY-4.0
#
# Worked example: the score is NOT the work — it is one lossy projection of it
# (, , P12). The slice's thesis is "frame-relative musical content; every
# notation is a lossy projection." Here a MusicalWork sits at the head of the WEMI
# spine. A printed gmeow:ScoreEdition (a Manifestation) embodies a notated
# Expression — but the notation FIXES only some musical parameters and DELEGATES
# others to the performer (gmeow:DegreeOfFreedom with determinationDelegatedPerformer).
# Two performed Expressions realize the very same work and agree on everything the
# score fixes (pitch, duration over the 12-EDO gmeow:tuningSystem12EDO frame) yet
# legitimately diverge on timbre and dynamics — the parameters the page never
# carried. That divergence is the proof of loss: the score under-determines the
# work, and the missing information lives in the performance, not the paper.
@prefix gmeow: <https://blackcatinformatics.ca/gmeow/> .
@prefix ex:    <https://blackcatinformatics.ca/gmeow/examples/music/> .
@prefix rdfs:  <http://www.w3.org/2000/01/rdf-schema#> .

# --- EXPRESSION (notated): what the page actually encodes, framed by 12-EDO.
ex:notatedExpression a gmeow:Expression ;
    rdfs:label            "engraved notation of the Nocturne"@en ;
    gmeow:realizes        ex:nocturne ;
    gmeow:realizationMode gmeow:realizationModeNotated ;
    gmeow:hasReferenceFrame gmeow:tuningSystem12EDO .

Common Companion Terms

gmeow:TuningSystem

External Equivalences

Equivalent or closely aligned targets: wd

Linkages

Generated from the canonical mapping DSL. SSSOM files are the generated public interchange form for term equivalences.

Term Equivalences