Extended Technique

Extended technique is a term used in music to describe unconventional, unorthodox, or non-traditional methods of singing or of playing musical instruments employed to obtain unusual sounds or timbres.

Composers’ use of extended techniques is not specific to contemporary music (for instance, Hector Berlioz’s use of col legno in his Symphonie Fantastique is an extended technique) and it transcends compositional schools and styles. However, use of these techniques appeared less frequently in the common practice period (c. 1600–1900) than in modern classical music since about 1900. Extended techniques have also flourished in popular music, which is typically less constrained by notions of "proper" technique than is traditional orchestral music. Nearly all jazz performers make significant use of extended techniques of one sort or another, particularly in more recent styles like free jazz or avant-garde jazz. Musicians in free improvisation have also made heavy use of extended techniques.

Most contemporary composers strive to explore the possibility of different instruments, cooperating with musicians in order to expand the "vocabulary" of given instruments. This undoubtedly increases the diversity of instrumental colors for contemporary pieces. However, some extended techniques are exceedingly difficult to master, or require instruments in uncommonly good condition; instruments are sometimes custom made to explore extended techniques.

Examples of extended techniques include bowing under the bridge of a string instrument or with two different bows, using key clicks on a wind instrument, blowing and overblowing into a wind instrument without a mouthpiece, or inserting objects on top of the strings of a piano.

Twentieth-century exponents of extended techniques include Henry Cowell (use of fists and arms on the keyboard, playing inside the piano), John Cage (prepared piano), and George Crumb. The Kronos Quartet, which has been among the most active ensembles in promoting contemporary American works for string quartet, frequently plays music which stretches the manner in which sound can be drawn out of instruments.