mode

Definition

A musical mode is a named interval pattern: a fixed ordered sequence of whole and half steps spanning an octave that gives a scale its identity and is named by tradition, independent of the pitch at which it is played. A mode is the pattern; a scale is the ordered pitch-class collection that instantiates the pattern at a given starting pitch. PARAMETERS: (1) interval pattern — the ordered sequence of steps spanning an octave (Dorian: W-H-W-W-H-W-H; Phrygian: H-W-W-W-H-W-H); the pattern, not the pitches, is the mode's identity; (2) name and tradition — a mode is identified by a name inherited from the ancient and medieval mode system (the Greek modes of the theoretical treatises), the church modes of Gregorian practice, or the nomenclature of the modes of major (ionian, dorian, phrygian, lydian, mixolydian, aeolian, locrian); an unnamed pattern is just a scale; (3) transposition invariance — the same pattern relocated to a different starting pitch is the same mode (D dorian and C dorian instantiate the dorian pattern); (4) characteristic intervals — the intervals that distinguish one mode from another (dorian's major sixth against aeolian's minor sixth; phrygian's minor second against dorian's major second). PERSISTENCE: codified in the ancient and medieval mode system (the eight church modes of Gregorian chant), in common-practice theory's use of 'mode' for the major and minor types, in 20th-century modal and jazz theory's systematization of the seven modes of major (Coltrane, modal jazz), and in every harmony curriculum; re-instantiated in every composition, improvisation, or analysis that names a mode ('in D dorian', 'phrygian cadence'). Distinctions: from musical-scale (the ordered set of pitch classes in a given key or transposition — the instantiated collection; the mode is the named pattern the collection instantiates, and the same pattern is the same mode at any starting pitch); from key (a mode anchored to a fixed tonic whose members bear functional roles — the board's own key definition presupposes the mode as 'the intervallic pattern above the tonic fixing the major or minor mode'; a key is a mode plus a center, a mode is the pattern without the center); from scale-degree (a position within a scale; a mode is the pattern of the whole scale, not a slot within it); from interval (a single distance between two pitches; a mode is the ordered sequence of such distances). [formal: modus | substrate: mind | horizon: centuries | explicit: yes | epoch: 0.01]

Why it is in scope

A human-made construct of music theory: a named interval pattern that gives a scale its identity — a fixed sequence of whole and half steps named by tradition, independent of the pitch at which it is played — built to persist as the standard vocabulary for naming scale types across the medieval mode system, the modes of major, and every harmony curriculum.

Relations from this entry

musical-scaleINSTANCE_OF →

INSTANCE_OF on the pinned sense: the mode as a named interval pattern (an ordered W/H step sequence) per the source's own definition. A mode is a specific kind of musical-scale: the target's accepted definition carves 'an ordered set of pitch classes spanning an octave, arranged according to a fixed interval pattern that distinguishes one scale from another (major, minor, pentatonic, chromatic, whole-tone, or a culture-specific pattern)' — and a mode is precisely such a named pattern (the named, tradition-borne patterns that carve points at but leaves without a home: dorian, phrygian, lydian, ...). Nearest kind (Law 11e): no intermediate rung exists on the board (no interval-pattern entry); key is a sibling, not a kind — key is a mode anchored to a tonic and is itself INSTANCE_OF musical-scale; scale-degree is a position within a scale, not a kind of scale. A competent speaker calls dorian 'a kind of scale'. Specific to general (Law 9).

Relations to this entry

key← DEPENDS_ON

Directional test (Law 2b): remove the mode construct (the named interval patterns — major, minor, the modes of major) now. The key's own definition fixes its quality as 'the intervallic pattern above the tonic fixing the major or minor mode' — without the mode, that parameter has no content: the key signature (its persistence mechanism, 'the sharps or flats that name the framework') loses the pattern it names, the functional hierarchy (tonic/dominant/subdominant functions) loses the mode-specific structure that distinguishes D major from D minor, and 'D major' becomes unnameable. What remains is an anchored pitch collection — a center plus a set, not a key. The key stops operating. Pinned sense (Law 11d): this is the mechanism edge — the pattern by which the collection is fixed — distinct from the already-accepted kind edge key INSTANCE_OF musical-scale, in the same shape as musical-scale DEPENDS_ON pitch.

Definition

Why it is in scope

Names and aliases

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Relations to this entry

Record identity