Clarinet

Chalumeau

Chalumeau register (E3–C4): Naturally stable. Flat tendency only if breath support is insufficient. Keep consistent air speed and open throat.

Throat Tones

Throat tones (G4–Bb4): The most problematic register. G4 can be +20¢ sharp. Use “AW” voicing (tongue low and back), relaxed embouchure, and slightly faster air. Pulling the barrel can help globally but doesn't fix throat tones in isolation.

Clarion

Clarion register (B4–C6): Most stable register. Consistent voicing ("EE" to "AW" as you ascend) keeps pitch in line. This is where your sound and intonation should feel most natural.

Altissimo

Altissimo register (C#6+): All notes tend sharp. Voicing is everything — tongue should be very high and forward. Different fingerings work on different clarinets — find what works on yours.

🎵 Reeds

• Reed hardness 2½–3: Standard for most players — softer reeds play flatter overall
• Harder reeds (3½–4): Better projection but tends sharper in clarion register
• Softer reeds: Easier throat tones but more flat tendency in chalumeau register
• Reed quality matters: warped or old reeds cause unpredictable pitch center
• Cut style (French/Filed vs American): Filed reeds respond more freely and tend to play slightly flatter

🎵 Mouthpiece

• Smaller tip opening: less flexibility, more controlled pitch, tends slightly sharper
• Larger tip opening: more flexibility, requires harder reed, tone center wider
• Shorter facing length: brighter tone, slightly sharper tendency
• Longer facing length: darker tone, slightly flatter tendency
• Hard rubber vs crystal: crystal tends slightly brighter and sharper

🎵 Barrel

• Barrel length: each mm of extra length = approximately 3-4¢ flatter overall
• Standard barrel is 65–66mm — pulling out 1–2mm addresses sharp tendency
• Wooden barrels respond differently to temperature than Grenadilla — expand less
• Longer barrel: flatter overall pitch, helps sharp throat tone region slightly
• Shorter barrel: sharper — only use if instrument plays consistently flat

Ji Deltas Instrument

• major-third
• major-sixth
• minor-third
• perfect-fifth

Section Role

• Wind ensemble: oboe gives the tuning A; clarinets and saxes tune to it
• Concert band: tune to a Bb concert (oboe or principal clarinet); brass tunes separately
• In SATB-style wind voicings, the bass instrument (bassoon / contra / baritone sax) holds root
• Major 3rds in woodwind chords are the easiest to over-sharpen — flatten by ~14¢ deliberately
• Whole tones (M2) in close voicings should sit ~+4¢ above ET for a pure 9/8 ratio

Genre Pitch Center

• Concert band: A=440
• Orchestra: A=440 (US) / A=442–443 (Europe, Japan many orchestras)
• Jazz/commercial: A=440; tempo and feel often more critical than absolute pitch
• Period/baroque: A=415 (low chamber pitch) or A=430 (Mozart-era classical)

Overrides

• Clarinet overblows at the 12th (3:1 ratio), NOT the octave — register changes are inherently in tune at the 5th + octave
• In a clarinet section, principals play slightly sharper than seconds and thirds for projection — by ear, not by instruction
• Bass clarinet voicing the chord root: the long tube exaggerates pitch problems; tune via barrel adjustment, not embouchure
• Clarinet choir: tune by sections (high, alto, bass) rather than as one mass; the 12th-relationship makes blending tricky

General

• Harder reed = brighter, more resistant, plays slightly sharper at given embouchure pressure
• Softer reed = darker, more responsive, plays slightly flatter; risk of pitch sagging on long notes
• Reed too short / overcut: pitch drifts sharp; tone center becomes thin
• Reed too long / undercut: pitch drifts flat; response becomes sluggish
• Embouchure pressure (jaw lift / bite): increases pitch; chronic biting causes 10–20¢ sharpness on every note
• Embouchure cushion (flesh-on-reed area): more cushion = warmer, slightly flatter; less = brighter, sharper
• Voicing (oral cavity shape, tongue position): "ee" position raises pitch / brightens; "ah" lowers / darkens

Specific

• Vandoren V12 vs traditional Blue Box: V12 cut plays slightly flatter with darker tone — common Bb clarinet pro choice
• Mouthpiece tip opening: more open (Vandoren M30, B45) = darker, requires softer reed; tighter (5RV) = brighter, harder reed
• Mouthpiece facing length: longer = darker, slower response; shorter = brighter, faster response
• Ligature material: metal = brighter; leather/fabric = darker, slightly flatter response
• Reed strength range: students use 2.5–3, intermediate 3–3.5, pros 3.5–4+ depending on mouthpiece
• Reed cycling: rotate 4+ reeds; never play the same reed two days running on important gigs