Register key

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The register key is a key on the clarinet that is used to play in the second register; that is, it raises the pitch of most first-register notes by a twelfth (19 semitones) when pressed. It is positioned above the left thumb hole and is operated by the left thumb. The same key used in combination with the left first finger key which produces the written note A4 (in scientific pitch notation) is used to play B♭4. Some clarinets, particularly bass clarinets and lower, have separate keys, or a more complex key mechanism, to control two or three separate holes for playing B♭, for playing the lower notes of the second register, and for playing the upper notes of the second register.

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The octave key is a key on the saxophone or oboe that raises the pitch of most notes by an octave when pressed, so that similar fingerings can be used for two different octaves.

Saxophone

The unusual and distinctive "underslung" octave key mechanism on a Conn 6M "Lady Face" alto saxophone. Conn6M6.JPG
The unusual and distinctive "underslung" octave key mechanism on a Conn 6M "Lady Face" alto saxophone.

On a saxophone, the octave key is positioned next to the left-hand thumb rest. Pressing the octave key opens the top tone hole in the neck of the saxophone. Alternatively, whenever the G key is fingered, the top tone hole closes and a small tone hole is opened near the top of the body.

Some baritone saxophones, notably those made by Yamaha, also have three octave tone holes. The third one is used to prevent a rough transition from G# to A.

Oboe

The modern oboe has two octave keys, sometimes three, often interconnected, the one for E5 to G#5 near the left thumb, and the one for A5 to C6 to the right of and above the front keys, depressed by the edge of the left index finger. Oboes are now available with automatic octaves. This involves extra keywork that frees the player from having to bother with an octave key at all. The bassoon has similar keys used by the left thumb, but these are usually only depressed at the attack of notes, or "flicked".

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Oboe Double-reed woodwind instrument

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Recorder (musical instrument) Woodwind instrument

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The Galician gaita is the traditional instrument of Galicia and northern Portugal.

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Organ stop Part of a pipe organ

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Tenor saxophone Type of saxophone

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Tonette

The stub-ended Swanson Tonette is a small, end-blown vessel flute made of plastic, which was once popular in American elementary music education. Though the Tonette has been superseded by the recorder in many areas, due to their price, durability and simplicity, plastic Tonettes are still in use in elementary schools around the nation. The range of the Tonette is from C4 to D5. A skilled player can produce notes above the principal register by overblowing and half-covering holes. Similar instruments are the Song Flute, Flutophone, and Precorder.

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The Boehm system for the clarinet is a system of clarinet keywork, developed between 1839 and 1843 by Hyacinthe Klosé and Auguste Buffet jeune. The name is somewhat deceptive; the system was inspired by Theobald Boehm's system for the flute, but necessarily differs from it, since the clarinet overblows at the twelfth rather than the flute's octave. Boehm himself was not involved in its development.

References

"Easy Steps to the Band", Taylor, Maurice D., 1985.

See also