Published
third
vr.tr.third · thing-q224074
Let an agent handle thirds by quality, size, tuning and role in harmony.
Thing Registry Cross-cutting context XCT.REL
Bundle → Layer → Finding → QuestionsClassifiersWhat it isWhy it existsDistinguishing featuresWhat robots and AI may and may not doMoral aspectsOwnersLinks to other meta-modelsIdentity and identifiersDirect propertiesRecognitionCapabilities and actionsHazards and failure modesStandards and interfacesContext of useSources
Bundle → Layer → Finding → Questions Filled
4 bundles · 8 layers · 8 findings · 16 questions
Interval Which third.
Quality
Major or minor.
Quality
Quality.
- Is this third major, minor or another quality? definition
- How many semitones does it span? measurement
Spelling
Note names.
Spelling
Spelling.
- How is it spelled in this key? definition
- Is an enharmonic spelling confusing it? boundary
Harmony Chords.
Triads
Major and minor chords.
Triads
Triads.
- How do thirds stack to form triads? definition
- Which third makes a chord major or minor? definition
Voice leading
Parts.
Voice leading
Voice leading.
- How do thirds behave in voice leading? definition
- Should the third be doubled? boundary
Tuning Size.
Systems
Equal and just.
Systems
Tuning systems.
- How large is the third in this tuning system? measurement
- How does it sound compared with just intonation? definition
Traditions
Other musics.
Traditions
Other traditions.
- Do other musical traditions use neutral thirds? provenance
- Where? provenance
Learning Ear training.
Ear
Recognition.
Ear
Ear training.
- How can major and minor thirds be recognised by ear? action
- Which reference songs help? action
Senses
Disambiguation.
Senses
Other senses.
- Is the ordinal third or the fraction one third meant? boundary
- Which entry fits? action
Classifiers Filled
- Family
- Thing Registry
- Category
- Cross-cutting context
- Entry kind
- thing
- Plane
- XCT
- Domain
- XCT.REL
- Other names and narrower kinds
- major third, minor third, augmented third, neutral third, septimal minor third
What it is Filled
In music, an interval spanning three diatonic scale degrees, such as the major third (four semitones) and minor third (three semitones), with other forms like augmented, neutral and septimal thirds.
Why it exists Filled
Let an agent handle thirds by quality, size, tuning and role in harmony.
Distinguishing features Filled
- Spans three scale degrees
- Quality depends on semitones
- Defines major and minor chords
- Tuning differs between systems
What robots and AI may and may not do Filled
Must not
- Present one tradition's tuning as the only correct one.
- Attribute a musical composition or arrangement to a person without evidence.
- Reproduce copyrighted scores or recordings while illustrating the interval.
Only with a human decision
- Publishing teaching material that will be used as an exam reference.
May
- Name, explain and identify thirds in music.
- Note when a tuning system makes a third differ from equal temperament.
Moral aspects Filled
- Music cultures differ in how they tune and value intervals; one is not more correct than another.
- Musicians' recordings and scores used as examples are their protected work.
Who is affected
- Musicians and learners
- Musical traditions outside the Western canon
Owners Filled
Steward
Nobody owns the concept; it is held in common by music theory.
Links to other meta-models Filled
parent
- Q189962 - registry parent class
related
- musical interval - category
- triad - chord
- tuning system - theory
- third (ordinal or fraction) - other senses
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.third
- Wikidata: Q224074 (https://www.wikidata.org/wiki/Q224074)
Direct properties not applicable Not applicable
- major third (equal temperament): 400 cents
- minor third (equal temperament): 300 cents
Plane XCT: no invented physical properties.
Recognition optional Filled
- Major and minor thirds
- Semitone count
- The ordinal third or a fraction are other senses
- Two notes three letter names apart on the staff.
Capabilities and actions required Filled
- identify the quality of a third
- build triads
- compare tuning systems
- train ear recognition
Hazards and failure modes required Filled
- Miscounting semitones
- Confusing enharmonic spellings
Standards and interfaces not applicable Not applicable
Not applicable
No formal standard, law or official classification specifically governs the musical interval of a third.
Context of use required Filled
- Building chords and melodies; thirds define major and minor harmony.
- major third
- minor third
- augmented and diminished thirds
- neutral third
- just and septimal thirds
Sources Filled
- Wikidata item Q224074: third - identity and sense of the item
- Third (music) - The musical interval spanning three staff positions.
- Major third - The third comprising four semitones.
- Minor third - The third comprising three semitones.
Open questions
- Should third qualities be separate entries?
- How should tuning systems be linked?
- How should other senses be split off?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q224074/spec.json