Contrabass

The bowed string family of the modern symphony orchestra consists of only four instruments: violin, viola, cello, and bass. More music has been written to feature these instruments than any other family of the orchestra (woodwinds, brass, or percussion). A full string section forms the backbone of most orchestral literature.

On string instruments, it is possible to change the pitch of a string by stopping the string with the left hand. In other words, the left hand applies pressure to a string against the fingerboard, in essence shortening its length. Shorter strings produce higher pitches, so as notes are stopped higher on the fingerboard, the pitch rises.

The most common way to produce a sound on orchestral string instruments is by drawing a bow across one or more of its strings. This technique is called arco. Because playing with a bow is the default method of playing these instruments, it is not necessary to write the term arco on the score unless canceling out an alternative way of playing, such as plucking or striking the strings.

It is possible to achieve a greater variety of timbres with the bowed strings than with any other orchestral instrument. Through the use of harmonics, mutes, varied bow placement, plucking or striking the strings, and other extended techniques, a large selection of sound possibilities becomes available.

The contrabass is the largest and the lowest of the bowed strings. Also known as double bass, bass viol, string bass, or simply bass it is positioned in front of the player, resting on an endpin, as the performer stands or sits on a high stool. Most of the techniques for violin, viola, and cello are possible on bass as well, and this instruments blends well with the other strings.