Related
The clarinet is the most "divided" instrument in the woodwind group: on one tube, three registers that sound like three different instruments. That is not a matter of style but of bore — the clarinet is one of the few cylindrical woodwinds.
| Classification | Value |
|---|---|
| HS class | Aerophone · reed · single reed |
| Sub-type | Vertical · cylindrical bore + bell · B♭ transposing instrument |
| Family | Western · Woodwinds (clarinet family) |
| Bayin | Not applicable — a Chinese system; the clarinet is outside it |
⚠️ One conceptual point: what really separates the clarinet from the oboe is not "one reed or two" but the bore. The clarinet's is cylindrical, so it sustains only odd harmonics (1, 3, 5…) and overblows a twelfth; the oboe family's is conical, so it sustains all harmonics and overblows an octave. Hence a clarinet needs a twelfth key where an oboe needs only an octave key. The key's name tells you the bore — the most useful single test in woodwind acoustics.
Structure: mouthpiece, cylinder and twelfth key
Three points:
1. A separate mouthpiece, unlike the oboe family: the single reed is bound to a rigid mouthpiece that fits into the top of the tube. Changing a reed takes seconds and reeds are factory products — a much lower barrier. 2. A cylindrical bore. Apart from the bell the body is a near-uniform tube. This decides all its acoustics. 3. A twelfth key, raising the note by a twelfth rather than an octave — the name states the fact.
Three registers, three characters
Why three registers? Because a cylindrical tube only admits odd harmonics. The low register uses the fundamental, the middle the 3rd harmonic, the top the 5th — skipping the 2nd and 4th. So each register change is a jump in colour, not a smooth transition.
| Register | Written range | Harmonic | Timbre |
|---|---|---|---|
| Chalumeau | E3–B♭4 | fundamental | dark, thick, woody |
| Clarino | B4–C6 | 3rd harmonic | bright, direct, most "clarinet" |
| Altissimo | above C♯6 | 5th and up | tense, thin, special fingerings |
Compare: the flute and oboe (conical) change register *gradually*, so they never sound "in three pieces". That is the cylinder's signature.
Range
⚠️ 降 B 调单簧管是移调乐器 —— 记谱比实音高大二度。谱面写 E3–C7，实际出声 D3–B♭6。高音区（altissimo）的实际上限视演奏者指法而定。
- Sounding D3–B♭6, over three and a half octaves — among the widest in the woodwind group (with the bassoon).
- The working register is D3–F5, with the clarino the most comfortable.
- The low register (D3–B♭3) is its second personality: thick and dark, and a favourite for lyrical phrases.
Timbre, and how to hear it
Four cues:
1. The clarino is the canonical voice: bright, free and loud — where nearly all melodies sit. 2. The chalumeau is a different instrument: dark, thick, faintly buzzing. 3. The altissimo has to be squeezed: thinner in colour and harder to place, used with care. 4. Its dynamic range is the widest of any woodwind — from a whisper to a fortissimo, which is why wind bands give it the leading line.
Playing techniques
- The break is the great obstacle: crossing it near B♭4 needs fingers, air and embouchure to change together — every clarinettist's rite of passage.
- Glissando / smear. The clarinet is one of the few winds that can produce a true glide; the scooping attack of jazz comes from here.
- Overblowing with the twelfth key and the embouchure to reach the altissimo.
- Vibrato is rare in classical playing and common in jazz and Eastern European folk.
The family
| Instrument | Key | Written vs sounding | Bore | Distinction |
|---|---|---|---|---|
| Clarinet | B♭ | written a major second above sounding | cylindrical | three registers, three voices |
| E♭ clarinet | E♭ | written a minor third below sounding | cylindrical | the band's brightest spike |
| Bass clarinet | B♭ | written a major ninth above sounding | cylindrical | the clarinet's bass |
| Bassoon | C | at pitch | conical | the woodwind bass |
| Alto sax | E♭ | written a major sixth above sounding | conical | single reed + conical bore |
This is the most important table of any woodwind page: it contains both the cylindrical family (the three clarinets) and the conical family (bassoon, sax), crossed with single versus double reed — two dimensions that together produce the whole skeleton of woodwind classification.
History
| Period | State |
|---|---|
| c. 1700 (Nuremberg) | improved from the traditional chalumeau with an added overblowing key — the clarinet begins |
| 18th c. | keys multiply; Mozart writes it a concerto and chamber music, and brings it into the orchestra and wind ensemble |
| 19th c. | two rival key systems appear — French (Böhm) and German (Oehler) — both still in use |
| Late 19th–20th c. | fixed as the modern clarinet; becomes central to orchestra, band and jazz |
| 20th c. | jazz makes it a solo protagonist; contemporary music exploits it heavily |
Its success has a practical cause: no reed scraping, a big sound, a wide range and a huge dynamic range. Those four make it both the easiest woodwind to start and the most versatile one.
Common misconceptions
- "Oboe and clarinet differ only in reed count." The decisive difference is the bore: a cylinder has only odd harmonics and overblows a twelfth; a cone has all of them and overblows an octave. Even the register behaviour differs.
- "The nickname \u201cblack tube\u201d means it is black and low." The nickname is about its looks (ebony or black resin) and says nothing about pitch; the clarinet actually sounds higher than the oboe.
- "A clarinet is a recorder." The recorder is a duct flute with no reed and no key system — a different family entirely.
- "A bass clarinet is just a louder clarinet." It is a separate instrument in B♭, written a major ninth higher, with a different size and use (see its own entry).
- "The three registers come from playing habit." They come from the bore: a cylinder skips the even harmonics, so register changes must jump in colour.
Next
Two directions within the family: higher, the E♭ clarinet, and lower, the bass clarinet — all three sharing one fingering logic and differing mainly in register and size.
For the other end of the "cylinder versus cone" test, go to the bassoon: also conical with a double reed, its tube so long it must be folded in a U. Then the saxophone — single-reed drive with a conical bore, the point where the two dimensions cross. :::
Listen in the library
All tracks from midicn-lib — inline badge is the license tier (C1 commercial / C2 non-commercial / C3 study only).
Sources
- 结构依通行制琴资料：全长约 66 厘米，分吹嘴、上节、下节、喇叭口四段，木质（或树脂）圆柱管，单片芦竹簧绑在吹嘴上
- 「单簧管为降 B 调移调乐器，记谱比实音高大二度」依通行配器资料
- 「音域记谱 E3–C7（实音 D3–B♭6）」依通行配器资料
- 「圆柱管只产生奇次泛音、超吹得十二度，因此单簧管拥有三个性格差异明显的音区」依管乐器声学
- 「现代单簧管键系分成法式 Böhm 体系与德式 Oehler 体系两支」依乐器史
Used for fact-checking only; all prose is original.