The clarinet mouthpiece - Syos

The clarinet mouthpiece

The clarinet mouthpiece is the most important part of the instrument when it comes to tone quality. Discover its anatomy and the materials used to craft it.

The clarinet mouthpiece is the most important part of the clarinet when it comes to acoustics and tone color. It connects the musician to the rest of instrument, and it's where the sound is shaped.

The clarinet mouthpiece as part of the instrument

the clarinet mouthpiece

The clarinet mouthpiece is located at the upper end of the instrument. Along with the clarinet reed and clarinet ligature, it allows the musician to produce sound.

Placement of the clarinet mouthpiece

The clarinet mouthpiece fits into the bore, in the baril to be precise. The lower part of the mouthpiece, the shank, can be covered with cork to allow the pieces to fit together tightly. Some mouthpieces, like the Syos clarinet mouthpiece, are fitted with silicone band seals which serve the same purpose.

two different clarinet mouthpieces

Clarinet mouthpiece anatomy

The clarinet mouthpiece is a masterpiece of complex geometry. It is the most important piece when it comes to sound production. Its internal geometry is responsible for variation in tone quality and the comfort of play for the musician.

The different parts of the clarinet mouthpiece

Here is a diagram of the different parts of a clarinet mouthpiece:

Clarinet mouthpiece parts

The most important parts are:

  • The mouthpiece chamber, which varies in size and shape (round, square, horseshoe...)
  • The tip opening, which corresponds to the distance between the reed and the mouthpiece tip
  • The mouthpiece facing curve, the length of the mouthpiece that curves away from the table
  • The mouthpiece baffle which is straight in most clarinet mouthpieces, but can vary in shape, particularly in jazz and klezmer clarinet mouthpieces.

The b-flat clarinet mouthpiece

The most popular clarinet is the b-flat clarinet (also known as the soprano clarinet). The most well-known b-flat clarinet mouthpiece brands are Vandoren, Selmer, Buffet Crampon, Pomarico, and Syos.

The bass clarinet mouthpiece

Bass clarinet is widely used in classical music as well as in modern musics, such as jazz and klezmer. The bass clarinet mouthpiece is wider and longer than the b-flat clarinet mouthpiece.

A bass clarinet mouthpiece

The bass clarinet mouthpiece fits into the instrument, just as the b-flat clarinet mouthpiece with cork or silicone seals on the shank. However, it does not fit into the baril but rather into the neck, just as saxophone mouthpieces. The bass clarinet mouthpiece anatomy is the same as that of the soprano clarinet, however the tip openings are generally wider.

Materials used to make clarinet mouthpieces

Soprano and bass clarinet mouthpieces can be made out of various materials. For a clarinet mouthpiece, the material has no influence on the sound. There are therefore many options. The most popular materials are:

Wood and ivory

Clarinet mouthpieces were originally made out of wood and ivory. However,nowadays these materials have been replaced by others, such as hard rubber, plastic and crystal.

Clarinet mouthpiece made of wood

Hard rubber

Hard rubber is a plastic resin made from natural rubber mixed with 20 to 40% sulfur, then subjected to intense heat (a process called vulcanization). Hard rubber was the most commonly used material for clarinet mouthpieces in the 20th century. It is a hard and brittle material (not to be dropped on the ground), and it is comfortable for the mouth.

Clarinet mouthpiece made of hard rubber


Some more recent clarinet mouthpiece brands make crystal mouthpieces (actually made of glass). They are usually easier to clean, but are as brittle as hard rubber mouthpieces. The feeling in mouth is also slightly different. The most famous crystal mouthpieces brand is Pomarico.

Clarinet mouthpiece made of crystal


Syos uses SCAL3D to craft saxophone and clarinet mouthpieces. It is a non-toxic material (lab certified) and is much less fragile when compared to glass and hard rubber. It has been speciffically designed and optimized for additive manufacturing, so it can be used with 3D printing to create unique custom mouthpieces.

Syos clarinet mouthpieces made of plastic

For more details, read our article about the clarinet mouthpiece chamber.