oud
Enable an AI agent to recognise an oud musical instrument, assess its configuration and playability, and determine suitable tuning, playing, maintenance and conservation actions.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
Researched by: Codex + Grok
Purpose and description
Enable an AI agent to recognise an oud musical instrument, assess its configuration and playability, and determine suitable tuning, playing, maintenance and conservation actions.
The ʿūd (oud) is a short-necked, fretless, pear-shaped plucked lute of the Arab, Persian, Turkish, and neighbouring art-music traditions, whose wooden soundbox, typically eleven or thirteen courses of strings, and plectrum technique define it as the principal chordophone of classical Middle Eastern ensembles.
It can be Identify and document the oud, preserving uncertainty about its attribution or variant.; Map installed strings to courses and evaluate a proposed replacement set or tuning.; Perform authorised open-string and fingered response checks with a recorded risha and tuning.; Adjust tuning or replace strings when compatibility, condition and permission support the action.; Select handling and case support that protect the bowl, soundboard and pegbox.; Refer bridge movement, neck instability or conservation-sensitive repairs to an appropriate specialist..
Distinguishing features
Look for a short neck and pear-shaped body, distinguishing the conventional oud form from long-necked lutes; use the combination rather than silhouette alone. [British Museum](https://www.britishmuseum.org/collection/object/W_As1972-03-4)
Inspect for a bowl-shaped back, wooden soundboard and backward-bending peghead; this combination helps distinguish conventional ouds from flat-backed guitars. [The Metropolitan Museum of Art](https://www.metmuseum.org/fr/essays/the-lute)
Check for a fretless playing surface and evidence of plucking with a risha; these support identification against fretted or primarily bowed instruments but are not individually decisive. [British Museum](https://www.britishmuseum.org/collection/object/W_2017-6003-1)
For ambiguous lutes or modified instruments, require maker documentation, provenance or specialist identification rather than treating fretlessness, string count or decoration as sufficient proof.
Scope
+ Evidence identifying the instrument as an oud and supporting any maker or regional attribution
+ Bowl, soundboard, neck, fingerboard, pegbox and bridge construction
+ Actual string courses, vibrating lengths, string specifications and tuning
+ Risha access, playing geometry and observed acoustic response
+ Structural condition, setup history and permitted interventions
- Agarwood, oud perfume and other non-instrument meanings of oud
- Maqam systems, compositions and performance traditions as independent concepts
- Musicians, makers and workshops beyond their relationships to this instrument
- Separate models of rishas, cases, microphones and amplifiers
- Ownership transactions, insurance and valuation processes
Characteristics
- Identification confidence
- confirmed oud | probable oud | unresolved lute | disputed attribution Prevents oud-specific setup assumptions from being applied to a misidentified instrument.
- Attributed making tradition
- documented tradition or maker designation; mixed; unknown; with evidence Provides context for setup while avoiding tuning or dimensional rules inferred solely from a regional label.
- Maker and modification attribution
- instrument linked to maker, workshop, repairer and supporting records Separates original construction from later changes that may affect identity and permissible work.
- Vibrating string length
- mm, nut contact to bridge contact, recorded per differing string path Informs string compatibility, tuning feasibility and playing geometry.
- Course configuration
- ordered courses with constituent strings, physical positions and occupied or vacant string paths Distinguishes intentional single courses from missing partners and prevents ambiguous tuning instructions.
- Installed string specification
- material, winding, gauge in mm, product designation and intended course; unknown allowed Supports replacement decisions and assessment of a proposed tuning.
- Measured and intended tuning
- Hz and pitch with octave per string; reference pitch in Hz; deviation in cents Separates the current acoustic state from the player's target without assuming a universal oud tuning.
- String action
- mm clearance at explicitly named fingerboard positions under recorded tuning Connects playability complaints to repeatable measurements.
- Bridge and neck attachment condition
- observed stable | suspected movement | visible separation | unassessed; with dated evidence Helps determine whether tuning or playing should wait for specialist assessment.
- Course response
- observed clean response, buzz, rattle, weak output, uneven sustain or untested; with test conditions Localises performance problems without mistaking room or player effects for instrument defects.
- Intervention permission
- specific action linked to owner or custodian permission and maker or conservator advice Distinguishes physically possible work from work authorised for this particular oud.
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 6 bundles · 11 layers · 18 findings · 38 questions.
Oud identity and attribution Establishes what instrument is present and how strongly its identity and attribution are supported.
The registry lacks a definition, and related lutes or modified instruments can share visible features.
Instrument identification
Tests the provisional musical-instrument interpretation against the actual object.
Identification evidence
Records observed morphology, playing interface and documentary evidence without making any single feature decisive.
- What evidence establishes that this instance is the oud musical instrument intended by vr.tr.oud? definition
- Which observed features distinguish it from the closest alternative lute identification? boundary
- Who supplied the identification, and what object records or examination support it? provenance
Making and alteration history
Separates supported maker or tradition attribution from later reconstruction and modification.
Attribution and originality
Connects labels, maker records and repair evidence to the instrument's present configuration.
- Which maker, workshop, date or making tradition is attributed, and what supports each claim? provenance
- Which neck, bridge, soundboard or pegbox features are documented as replacements or alterations? provenance
- Does an alteration leave the oud identification secure or require specialist review? boundary
Bowl and string-bearing structure Records the resonating body and the components carrying string forces.
An oud's visible completeness does not establish that its soundboard, bridge or neck can support the intended setup.
Resonating body
Describes the bowl, soundboard, openings and inspectable internal construction.
Body construction evidence
Distinguishes observed construction from material or bracing claims that have not been verified.
- How are the bowl, soundboard and sound openings constructed, and which features can actually be inspected? definition
- What examination or maker record supports the stated woods, bracing and assembly methods? provenance
- What are the bowl depth and soundboard dimensions, using stated measurement points? measurement
String force path
Follows the installed strings through their bearing points and attachments.
Bridge, neck and pegbox integrity
Records attachment design, alignment and evidence of movement at string-bearing components.
- Where do the strings terminate and bear, and how are the bridge and neck attached on this oud? definition
- What separation, distortion or alignment change is visible, and under what tuning was it observed? measurement
- What unresolved structural evidence requires review before increasing string tension? action
Courses, strings and tuning Makes the actual string arrangement and intended tuning explicit.
Neither the name oud nor a regional attribution is enough to select strings, course order or pitch targets.
Course and string map
Maps each physical string to its course, bearings and specification.
Installed course configuration
Records the instrument as found without interpreting empty positions as defects automatically.
- How many courses and strings are installed, and how is their order anchored to physical position? measurement
- Which unoccupied positions are intentional, and which indicate missing strings? boundary
- What string specifications and vibrating lengths apply to each occupied position? measurement
Tuning compatibility
Separates measured pitches, requested pitches and evidence that the requested setup is appropriate.
Supported tuning target
Requires an explicit pitch map and compatibility evidence before tuning changes.
- What are the measured and target pitches of every string, including octave and reference frequency? measurement
- What maker guidance, string specifications or assessed setup history supports this target at the measured vibrating length? provenance
- Can the requested tuning proceed, or must string identification or structural assessment happen first? action
Fretless playability and response Connects the playing surface, risha access and acoustic observations to intended use.
A tuned oud may still be difficult to stop cleanly, pluck comfortably or use consistently across its courses.
Stopping and plucking interface
Assesses fingerboard geometry and access to the installed courses.
Playing geometry
Records action, spacing and surface condition in relation to the intended player's use.
- What are string clearances and course spacings at specified nut, fingerboard and bridge positions? measurement
- Where do fingerboard wear, string placement or body clearance interfere with stopping or risha strokes? measurement
- Which setup changes are supported for the intended playing orientation and technique? action
Audible response and stability
Documents repeatable response checks and their limitations.
Course response observations
Locates acoustic symptoms while retaining the tuning, player, risha and test conditions.
- Which open or fingered positions produce buzzes, rattles, weak response or uneven decay during a documented test? measurement
- How much does each string's pitch drift over a stated interval under recorded conditions? measurement
- What evidence distinguishes an instrument or string problem from player, room, microphone or amplification effects? boundary
Oud care and intervention Turns observed condition and custodial requirements into instrument-specific handling and maintenance decisions.
Playing, restringing, supporting the bowl and repairing the soundboard involve different evidence and permissions.
Condition and protective support
Tracks vulnerable body features and the suitability of storage or transport support.
Body condition and case fit
Records changes to the bowl, soundboard and fittings alongside contact points in the case or stand.
- Where are cracks, open bowl seams, loose rosettes or soundboard deformation, and have they changed since the previous inspection? measurement
- Does the case or stand support the oud without loading the bridge, soundboard, pegs or projecting pegbox? boundary
- What handling or storage changes are supported by this instrument's observed condition and maker or conservator guidance? action
Maintenance and conservation decisions
Separates routine setup actions from repairs affecting original material or structural integrity.
Permitted intervention
Links each proposed action to its purpose, evidence, permission and completion check.
- Is this oud maintained for performance, conservation, display or a documented combination of uses? definition
- Who may authorise restringing, peg work, bridge work or soundboard repair, and what restrictions apply? action
- What checks of attachment stability, action, tuning and audible response must follow the proposed intervention? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Kinds and varieties
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Arab ʿūd ʿarabī (Egyptian, Levantine, Iraqi schools; typically 11 strings in 5 double courses plus a single bass)
- Turkish ud (shallower bowl, lighter construction, often 11 or 13 strings, brighter treble)
- Persian barbat / contemporary Iranian oud (often 10-11 strings, distinct tuning and playing posture)
- North African / Maghrebi ʿūd (ʿūd ʿarbī, ʿūd ramal, Moroccan and Algerian variants with regional tunings)
- Iraqi ʿūd (Munir Bashir school; floating bridge, longer sustain, microtonal maqām technique)
- Electric / electro-acoustic oud (piezo or magnetic pickup on a traditional or solid-body shell)
- Bass oud (lower-register instrument used in modern ensembles)
- Historical medieval ʿūd / European lute ancestor (pre-modern construction reconstructed from iconography and treatises)
- Which of these kinds and varieties hold for the sense of oud this model covers, and on what evidence? provenance
Identifiers and schemes
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Wikidata - Q191478 - item for the musical instrument ʿūd / oud / ud
- Hornbostel-Sachs - 321.321-6 - necked bowl lute sounded by a plectrum (composite chordophone)
- MIMO / MIMO-DB - oud; ʿūd; ud - museum instrument keyword used in the Musical Instrument Museums Online vocabulary
- ISO 639-3 / language of associated repertoire (not the object) - n/a for the object itself - the instrument has no ISO language or taxonomic code; species codes apply only to agarwood 'oud', a different thing
- Which of these identifiers and schemes hold for the sense of oud this model covers, and on what evidence? provenance
Standards and regulation
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Hornbostel-Sachs classification (revision used by MIMO and ICOM CIMCIM) places the oud among necked bowl lutes 321.321
- CITES and national wildlife law do not govern the instrument as such, but do restrict some soundboard and inlay woods (Dalbergia spp., ivory, tortoiseshell) used in historic or luxury instruments
- UNESCO 2003 Convention listings that name the oud as a vehicle of living heritage include Iraqi Maqam (Representative List, 2008) rather than a standard for the object itself
- There is no ISO product standard or legal metrology code for ouds as manufactured goods
- Which of these standards and regulation hold for the sense of oud this model covers, and on what evidence? provenance
Real-world use
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Solo taqsīm and composed samāʿī / bashraf / longa repertoire in Arab art music
- Melodic nucleus of the takht / firqa and of Turkish fasıl and gazino ensembles
- Iraqi maqām suite accompaniment and solo school associated with Sharif Muhiddin Haydar, Munir Bashir, and Naseer Shamma
- Teaching instrument in conservatoires (Cairo, Damascus, Baghdad, Istanbul, Tunis) and in diaspora community schools
- Studio and film scoring, fusion, and amplified concert use via electro-acoustic models
- Luthiery trade centred on Istanbul, Cairo, Damascus (historically), and émigré workshops in Europe and North America
- Which of these real-world use hold for the sense of oud this model covers, and on what evidence? provenance
Typical measurements
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- string courses / total strings - 5-7 courses; 10-13 strings (commonly 11: 5×2 + 1) - count
- vibrating string length (mensur) - about 585-620 - mm
- bowl (body) length - about 480-520 - mm
- bowl depth - about 180-210 (Turkish often shallower than Arab) - mm
- stave count of the bowl - 15-21 typical; 21-29 on some Turkish and luxury bowls - count
- pitch of the treble course (common Arab tuning reference) - c' or d' for the highest course, with regional scordatura - nominal pitch
- mass of a concert instrument - about 0.8-1.4 - kg
- Which of these typical measurements hold for the sense of oud this model covers, and on what evidence? provenance
Failure modes and hazards
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Soundboard (face) cracking from humidity cycling, especially around the rose and bridge
- Bowl-stave glue-joint failure and collapsed ribs after impact or dry storage
- Neck (fingerboard) warp or action rise that makes a fretless instrument unplayable
- Bridge lift or belly distortion from string tension, worse on 13-string and high-tension nylon/PVF sets
- Plectrum (risha / mızrap) and right-hand nail injury; left-hand tendon strain from long taqsīm practice
- Allergenic dust and finish solvents in luthiery (rosewood, ebony, shellac, cyanoacrylate)
- Illegal-wood risk: Dalbergia and other CITES-listed species in older or luxury bowls and fingerboards
- Confusion-driven market hazard: 'oud' as a perfume oil (agarwood) is a different commodity with its own CITES controls
- Which of these failure modes and hazards hold for the sense of oud this model covers, and on what evidence? provenance
Regional variation
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Arabic ʿūd versus Turkish ud versus Persian barbat: bowl depth, string count, tuning, plectrum, and posture differ by school, not merely by name
- Egyptian/Levantine concert pitch and tuning (often C or D based) versus Turkish (often a whole tone higher relative to the same fingering)
- Iraqi floating-bridge and risha technique versus Egyptian risha-on-soundboard attack
- Maghreb ʿūd ʿarbī and related types retain older tunings and sometimes a different rose and pegbox
- European 'oud' in early-music and world-music shops may be a Turkish-pattern instrument sold under the Arab name
- In perfume and trade English, oud means agarwood (Aquilaria spp.) oleoresin, not the lute - a homonym, not a regional synonym of the instrument
- Which of these regional variation hold for the sense of oud this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- European lute (Renaissance/Baroque lute) - The lute is a historically derived, usually fretted descendant with a bent-back pegbox and different stringing; the oud is fretless, with a shorter neck and a sickle or open pegbox. Shared ancestor, not the same instrument.
- Persian tar / setar - Long-necked, typically fretted (tar has a double bowl and metal strings); the oud is a short-necked unfretted bowl lute.
- Greek laouto / lavta - Usually fretted and used in different repertoires; the lavta is closer to a small Turkish lute. Test: frets present, stringing, and repertoire.
- Qanun (kanun) - A plucked zither with a trapezoidal soundboard and levers, not a necked lute. Test: presence of a neck and bowl versus a flat zither body.
- Agarwood / oud oil (Aquilaria oleoresin) - A fragrant infected heartwood and its distillate, CITES-listed as flora; homonymous in English and some trade languages. Test: is the referent a chordophone or a botanical material?
- Barbat (historical) - The early Persian short-necked lute ancestral to the ʿūd; modern 'barbat' may denote a Persian-style oud. Test: historical period and whether the instrument is the medieval form or a living Iranian oud.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of oud this model covers, and on what evidence? provenance
Sources
- Oud - Organological definition, regional types, construction, and historical relationship to the European lute.
- The Oud - Construction, stringing, tunings, and Arab performance practice as documented in a specialist organology monograph.
- Iraqi Maqam - The oud as a core instrument of Iraqi maqām performance practice.
- oud (Q191478) - Stable identifier, Hornbostel-Sachs class, and aliases across languages.
What the second pass must settle
- Does vr.tr.oud mean the musical instrument, agarwood, a fragrance product or another registered concept?
- Does an existing Vercy world model already own this concept, requiring a link instead of a separate model?
- Which historical, electric, reduced-body or otherwise modified instruments belong within this entry, and what evidence resolves borderline identifications?
- Which maker-specific sources establish compatible string sets, pitch targets and acceptable playing geometry for the variants included?
- Which conservation sources establish instrument-specific environmental guidance and criteria for suspending playing or referring structural work?