Clarinet keys closeup

Close-up of clarinet keys, a precise mechanism that controls opening and closing of tone holes for sound production.

About this subject

The keys of a clarinet form a complex mechanical system that allows the musician to produce the full chromatic scale. Each key is a lever that, when pressed, opens or closes a tone hole in the instrument's body, altering the effective length of the air column and thus the pitch of the note. The design of these keys has evolved over centuries: from the two-key baroque clarinet to the Boehm system (French) and the Oehler system (German), widely used in orchestras and bands.

Frequently Asked Questions

How many keys does a modern clarinet have?

A standard Boehm-system clarinet has 17 to 20 keys, depending on the model and tuning (e.g., soprano in B-flat).

What is the difference between the Boehm and Oehler key systems?

The Boehm system, more common, has rounder keys and larger tone holes, making fingering easier and producing a brighter sound. The Oehler system, preferred in Germany and Austria, has smaller holes and more complex keys, yielding a fuller, darker tone.

What material are clarinet keys made of?

Traditionally, keys are made of silver or nickel silver, but also can be gold, copper, or stainless steel. The choice affects weight, durability, and slightly the timbre.