harmonica
Enable an AI agent to recognise a harmonica, assess its playing condition and suitability, and decide whether it can be played, cleaned, adjusted or repaired.
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 a harmonica, assess its playing condition and suitability, and decide whether it can be played, cleaned, adjusted or repaired.
A small free-reed wind instrument played by blowing and drawing air through a row of holes in a mouthpiece, each hole sounding one or two reeds fixed to plates inside a comb; made in diatonic, chromatic, tremolo, octave, bass and chord forms.
It can be Select a harmonica for a required pitch layout, range and playing technique.; Inspect and test individual blow, draw and control-dependent responses.; Identify positions supporting bends or other pitch alterations when demonstrated.; Clean and dry accessible parts using a method compatible with the fitted materials.; Adjust, repair or replace serviceable parts where the procedure and compatibility are established.; Withhold playing or servicing when mouth-contact condition, loose parts or unresolved damage prevents a supported action..
Distinguishing features
Sound is produced by airflow exciting reeds rather than by a vibrating string, lip buzz or an edge-tone whistle.
The player selects air passages through a mouthpiece or exposed row of holes, rather than selecting notes primarily through a keyboard.
Its note layout can be described by mouth position and breath direction, with any slide or other control recorded as an additional selector.
A complete playable assembly combines air chambers and reeds with a mouth-contact interface; a loose reed plate or comb is a component rather than a complete harmonica.
A slide button alone does not establish that it is a chromatic harmonica; the actual pitch layout and routing must support that classification.
Scope
+ Harmonica type, identifying marks and fitted configuration
+ Mouthpiece, comb, chambers, reed plates, covers and any slide mechanism
+ Hole-to-note mapping across blowing, drawing and available control positions
+ Air sealing, reed response, pitch stability and unintended sounds
+ Mouth-contact cleanliness, material condition and permitted maintenance
- The player's physiology, health and general musical skill
- Compositions, arrangements and performance events
- Microphones, amplifiers and effects equipment
- Cases, racks and holders as independently managed accessories
- Retail offers, ownership transactions and market valuation
Characteristics
- Instrument family
- diatonic; slide chromatic; tremolo; octave; bass; chord; other; unresolved Determines which layout, response and control expectations are appropriate.
- Mouthpiece hole arrangement
- Hole count, row count and physical grouping Establishes how playable positions are identified without assuming one hole equals one note.
- Installed pitch layout
- Mouthpiece position × breath direction × control position → sounding pitch or pitches Supports recognition of tuning variants, missing notes and suitable musical uses.
- Marked key and tuning designation
- Observed inscription or documented designation; absent; unresolved Provides an identification clue that must be checked against the installed layout.
- Pitch deviation
- Cents from a stated target under recorded playing conditions Separates measured tuning behaviour from an unsupported judgement that the instrument is out of tune.
- Reed response
- Responsive; delayed; intermittent; silent; rattling; untested, by playable position Localises faults and establishes whether intended notes can be produced reliably.
- Air-path sealing
- No problematic leakage observed; leakage suspected; leakage localised; untested Helps distinguish air loss from reed or technique problems.
- Wetted and mouth-contact materials
- Observed or documented materials and coatings by component; unknown Constrains cleaning, soaking, drying and mouth-contact suitability.
- Service-part compatibility
- Instrument configuration → verified compatible reed plates, reeds, valves, slides and fasteners Prevents repairs based only on similar appearance or a shared brand name.
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.harmonica
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 6 bundles · 11 layers · 11 findings · 24 questions.
Identity and configuration Establishes what kind of harmonica is present and whether its current assembly matches its apparent identity.
Family labels and cover markings do not establish the tuning or components currently installed.
Family recognition
Classifies the instrument from its air interface, reed arrangement and controls.
Supported harmonica type
Record the observed features supporting a family classification and any conflicting evidence.
- Which mouthpiece, reed-pairing and control features support the proposed harmonica family? definition
- Does this object form a playable harmonica, or is it a component or a neighbouring free-reed instrument? boundary
Assembly identity
Connects identifying marks to the actual fitted comb, reed plates and covers.
Marked versus fitted configuration
Record inscriptions, documented model identity and evidence of replacement or customisation.
- What maker, model, key or tuning marks are present, and what evidence links them to this assembly? provenance
- Have reed plates, covers, comb or tuning been changed so that external markings no longer describe the instrument? provenance
Note layout and selection Describes which pitches the harmonica offers and how the player selects them.
Key and hole count alone cannot determine playable notes, chords or control behaviour.
Breath and position map
Maps physical playing positions to their intended blow and draw outputs.
Installed note map
Record pitches and octaves by mouthpiece position, including simultaneous reeds and intentional gaps.
- Which intended pitches and octaves correspond to each position when blowing and drawing? definition
- Where does one playing position sound multiple reeds, and are their intended relationships unison, tremolo, octave or chordal? definition
Selectors and range
Describes how slides or other fitted selectors change available notes.
Control-dependent pitches
Record selector states, their pitch-routing effects and the resulting available range.
- For each fitted selector position, which blow and draw pitches become available? measurement
- Which requested notes or chords can this layout supply without relying on an unverified pitch-altering technique? action
Playing response and tuning Assesses how the fitted reeds respond and how their sounding pitches relate to intended tuning.
A nominally correct layout can still be difficult to sound, unstable or unsuitable for the intended musical use.
Reed speaking behaviour
Examines note onset and sustained sound under recorded test conditions.
Position-specific response
Record silent, delayed, intermittent or noisy responses by position and breath direction.
- Which positions speak reliably under the documented test method, and which produce silence, delay, choking or unintended noise? measurement
- What repeat test or inspection can distinguish a reed fault from leakage, moisture or the player's technique? action
Pitch and expression
Separates intended tuning, measured deviation and deliberate pitch alteration.
Tuning and altered-note evidence
Record tuning targets and measured behaviour without treating every deviation from equal temperament as a defect.
- How far do measured pitches deviate from the stated tuning targets, and under what breath and measurement conditions? measurement
- Which bends, overblows or overdraws have been demonstrated on this instrument, at which positions and by what test? measurement
- Are observed pitch offsets intentional features of its temperament or paired-reed tuning, or unresolved deviations? boundary
Air path and mechanical condition Assesses the physical structures that route air and allow reeds and controls to move.
Leakage, obstruction and mechanical interference can produce similar playing symptoms but require different interventions.
Chambers and seals
Examines comb chambers, mating surfaces and fitted valves for air-routing problems.
Air-routing integrity
Record cracks, distortion, debris, suspected leakage and valve behaviour where valves are fitted.
- Where is air escaping or becoming obstructed, and what observation localises the problem? measurement
- Are comb surfaces, reed-plate joints and any fitted valves intact and functioning under the test conditions? measurement
Moving parts and clearance
Examines reed clearance, cover interference, fasteners and any slide mechanism.
Mechanical interference
Record loose, obstructed or damaged parts and whether they affect playing or require inspection before use.
- Do reeds move without observed contact, and do covers or loose fasteners create interference or rattling? measurement
- If a slide is fitted, does it travel and return reliably while selecting the expected air passages? measurement
- Which observed defects require withholding play until loose parts, sharp edges or mechanical damage are addressed? action
Mouth-contact care and service Determines appropriate cleaning, drying and repair actions for this harmonica's construction and condition.
Internal moisture exposure and delicate reeds make care decisions dependent on materials, access and fitted components.
Cleanliness and material limits
Records mouth-contact condition and the evidence supporting a cleaning method.
Supported cleaning method
Connect observed residue, corrosion and moisture to material-compatible cleaning and drying instructions.
- What residue, retained moisture, corrosion or coating damage is visible at the mouthpiece and accessible internal surfaces? measurement
- Which documented cleaning and drying methods apply to the fitted comb, reeds, valves, coatings and adhesives? provenance
- What cleaning action is supported by that evidence, and what unresolved material information prevents a method from being selected? action
Repair and return to play
Defines feasible servicing and the checks required after intervention.
Verified service path
Record the supported repair, compatible parts and evidence that the repaired instrument performs as intended.
- Which adjustment or replacement is supported for the diagnosed fault, and what confirms part and procedure compatibility? action
- After servicing, which affected notes, seals, controls and mouth-contact surfaces must be checked before returning the harmonica to play? 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.
- diatonic harmonica
- chromatic harmonica
- tremolo harmonica
- octave harmonica
- Which of these kinds and varieties hold for the sense of harmonica this model covers, and on what evidence? provenance
What the second pass must settle
- Should ensemble bass and chord harmonicas, double-sided instruments and unusual selector designs remain variants within this model, and which require additional layers?
- What repeatable playing test can separate instrument faults from player-dependent response without imposing unsupported universal breath-pressure thresholds?
- Which authoritative tuning references cover temperament, pitch reference and intentional paired-reed offsets across the included harmonica families?
- Which manufacturer-supported care procedures apply to different comb materials, coatings, valves and adhesives, especially when the construction is undocumented?
- What evidence is sufficient to recommend reed adjustment or replacement rather than specialist assessment for a particular construction?