Musical Interval Catalog
The 13 simple musical intervals of Western tonal theory, from unison (P1) through the octave (P8), with the standard abbreviation, semitone span, quality label, and consonance class. Every row is read live at build time from OnlyCSharp.Data.Catalogs.Arts.Music.MusicalIntervalCatalog.All. Authored as .razor; rendered to static HTML.
Source: standard Western music theory / Wikipedia “Interval (music)” (facts of nomenclature and semitone counts are uncopyrightable; article text CC BY-SA is not reused — only the underlying facts). Each record carries a WikiSlug provenance anchor. See the leaf README.
| # | Name | Abbr. | Semitones | Quality | Consonance |
|---|---|---|---|---|---|
| 0 | Unison | P1 | 0 | Perfect | Perfect consonance |
| 1 | Minor second | m2 | 1 | Minor | Dissonance |
| 2 | Major second | M2 | 2 | Major | Dissonance |
| 3 | Minor third | m3 | 3 | Minor | Imperfect consonance |
| 4 | Major third | M3 | 4 | Major | Imperfect consonance |
| 5 | Perfect fourth | P4 | 5 | Perfect | Perfect consonance |
| 6 | Tritone | TT | 6 | Augmented/Diminished | Dissonance |
| 7 | Perfect fifth | P5 | 7 | Perfect | Perfect consonance |
| 8 | Minor sixth | m6 | 8 | Minor | Imperfect consonance |
| 9 | Major sixth | M6 | 9 | Major | Imperfect consonance |
| 10 | Minor seventh | m7 | 10 | Minor | Dissonance |
| 11 | Major seventh | M7 | 11 | Major | Dissonance |
| 12 | Octave | P8 | 12 | Perfect | Perfect consonance |