Lowest-pitched instrument in the trombone family
The contrabass trombone (, ) is the lowest-pitched instrument in the trombone family of brass instruments. While modern instruments are pitched in 12 ft (12′) F with a single slide, the first practical contrabass trombones appeared in the mid-19th century built in 18′ B♭ an octave below the tenor trombone with a double slide. German opera composer Richard Wagner notably called for this instrument in his "Der Ring des Nibelungen" opera cycle in the 1870s, and contrabass trombone has since appeared occasionally in large orchestral works without becoming a permanent member of the modern orchestra.
Since the late 20th century, the double-slide contrabass has largely been supplanted by the less cumbersome bass-contrabass in F, a fourth below the B♭ tenor and bass trombones. In the 21st century the contrabass has enjoyed something of a revival, particularly in film and video game soundtracks.
History.
The contrabass trombone first appeared in Renaissance music in the late 16th century. Bass trombones of the time were the pitched in E, or the in D, a fourth or fifth below the "common" tenor trombone in A. German music scholar Michael Praetorius, writing c. 1620, also describes two types of (lit. 'octave trombone'), one of which was a large sackbut built in A one octave below the tenor, with a very long slide and an extension handle to reach the lower positions. One such instrument survives, built in 18′ B♭. Praetorius called this double-length instrument very rare. Canadian trombonist and early music specialist Maximilien Brisson proposes the other type was a large-bore with an extra whole-tone crook, resulting in an instrument in C capable of playing down to G1, the lowest open string of the G Violone. These large instruments were seldom used and generally unsatisfactory with players, being unwieldy and taxing to play.
The innovation that enabled a practical instrument was the "double slide", first documented nearly two centuries later in 1816 by German writer and composer Gottfried Weber. He proposed that it would lend greater facility to the bass trombone, and described the idea of using two joined outer slides moving on four inner tubes, halving the distances between slide positions. Makers soon applied the double slide to bass trombones in F and E♭ that would normally require a slide handle to reach the longest positions. Newly invented models of contrabass trombone in low 16′ C and 18′ B♭ soon followed, and the first double-slide contrabass trombones were produced by Parisian maker Jean Hilaire Asté (known as Halary) in the 1830s.
First use in orchestral music.
In France, composer Georges Bizet called for contrabass trombone in his opera (1869), and in his completion in the same year of "Noé", an unfinished opera by his father-in-law and French composer Fromental Halévy. Soon after, Wagner notably employed contrabass trombone in his "Der Ring des Nibelungen", a cycle of four operas commonly known as the "Ring" cycle, writing a fourth trombone part to double on bass and contrabass trombone. For the première in 1876, Wagner commissioned a contrabass in 18′ B♭ from Berlin instrument maker Carl Wilhelm Moritz, who built it with a double slide. The double slide and the pitch one octave lower means this instrument has the same seven positions as the tenor trombone, and a range to the low E1 in the "spear" motif in "Das Rheingold":
 ;score lang="lilypond" ;
 \relative g {
 \override DynamicTextSpanner.style = #'none
 \override Hairpin.minimum-length = #5
 \clef bass \key c \major
 g2~ \ff g8 f8 e8. d16
 c4 b a g f e d c \break
 b a g f e1~ \dim\! « e1~ { s2 s4 s4 \ ; } » e4 \! \p r4 r2
 } ;/score ; The “spear” motif intended for contrabass in the fourth trombone part of "Das Rheingold", the first opera in Wagner's "Ring" cycle.
In Britain in the 1860s, London instrument maker Boosey &amp; Co. built a small number of "Basso Profundo" double-slide contrabass trombones in 16′ C. These were intended for use in British orchestras performing Wagner's operas, and one surviving instrument built in 1898 was named "King Kong" by players. At the turn of the 20th century, American instrument manufacturer C. G. Conn produced a small number of B♭ double-slide contrabass trombones.
19th century Italy.
Italian composers for much of the 19th century specified the cimbasso as the bass voice of the brass section, a confusing term which over time referred to an upright serpent, ophicleide, or early variants of the tuba. In preparation for the La Scala première of "Aida" in 1872, Italian opera composer Giuseppe Verdi expressed his displeasure about "that devilish " (referring to the tuba) as the bass of the trombone section, preferring a "". In 1887 for "Otello", Milan instrument maker Pelitti produced the (or sometimes, ), a valved contrabass trombone in low B♭. This instrument blended with the usual Italian trombone section of the time—three tenor valve trombones in B♭—and became the prototype for the modern cimbasso. Verdi and Italian opera composer Giacomo Puccini both wrote for this instrument in their later operas, although confusingly they often referred to it as simply to distinguish it from the tenor trombones.
Later innovations.
In 1921, Ernst Dehmel, a Berlin trombonist, patented a new design of contrabass trombone that added two independent rotary valves to the old bass trombone in F, still found in Prussian military bands of the time. The valves provide a fully chromatic range by supplying missing low register notes between the pedal F1 in first position and the second partial C2 in sixth (slide fully extended, without using a handle). The valves also provide alternatives for other notes in long slide positions, thus neither a longer slide with a handle nor a cumbersome double slide are needed. Dehmel's bass-contrabass instrument is the prototype for all modern F contrabass trombone designs.
Contemporary use.
Since the 1990s, the contrabass trombone in F with two valve attachments has all but replaced the double slide B♭ instrument.
The contrabass trombone is increasingly called for in large orchestral works by modern composers, and routinely since the late 1990s in film and video game soundtracks.
Construction.
Instruments in F are built with two independent ("in-line") valves. These valves are usually tuned two ways. A "traditional" configuration common with European manufacturers has a first valve lowering the instrument a minor third into D, and a second that lowers it a fifth into B♭, which when used together lower the instrument a major sixth into A♭. The "American" style commonly favoured by American manufacturers and players has valves in C and D♭, combining to give A. This results in a contrabass with valves using the same intervals (F/C/D♭/A) as a two-valve bass trombone (B♭/F/G♭/D). Some instrument makers provide sets of tuning slides that allow changing between both configurations.
The bell diameter is similar to or slightly larger than a bass trombone, at around . The bore is typically at least as wide as the version usually used in modern bass trombones, and is commonly around in size. Some models employ a dual-bore slide, and many models are now made using Axial or Hagmann valves.
Double slide instruments.
Double slide contrabass trombones are still made by German makers Thein and Miraphone, in 18′ B♭ (Miraphone also offer one built in 16′ C). The bore is large, varying from up to for the largest Miraphone models. They are all built with at least one valve that lowers the instrument a fourth (i.e. B♭/F or C/G), and the Miraphone C model has a second independent valve tunable to A or A♭. The second valve can also be fitted with a smaller B♭ tuning slide, and has a reversible linkage to place the instrument in B♭, raising it to C when engaged.
The "double slide" can be conceived of as two regular trombone slides operating as one, i.e. two outer slide bows braced together, moving on four parallel inner slides. Although it eliminates the need for a long slide with a handle, it doubles the weight, the friction of movement, and the length of the air column that must be strictly cylindrical.
Older double slide instruments from the 19th and early 20th centuries (e.g. Conn, Boosey &amp; Co., and French makers Courtois and Jérôme Thibouville-Lamy) had no valves and were built with narrower bores, and some instruments only have six usable slide positions, instead of the seven that would be expected.
Range.
 ;score lang="lilypond" ; {
 \clef bass \key c \major \cadenzaOn
 \ottava #-1 \tweak font-size #-2 fis,,1 \finger \markup \text "poss."
 \ottava #0 c, \glissando d'
 \tweak font-size #-2 f'
 \ottava #-1
 \tweak font-size #-2 f, ^ \markup "pedals"
 \glissando
 } ;/score ;Range of the F contrabass trombone.
The range of a modern F contrabass trombone with two valves is fully chromatic from at least C1 to F4, with a comfortable working range of approximately E1 to D4. Pedal tones are distinct and resonant, and can be obtained to C1 with the six reachable open slide positions. In theory the range extends as far as F♯0 using both valves, but in practice very low pedal tones become increasingly difficult to produce on cylindrical-bore brass instruments due to their inherent acoustical limitations.
 ;score lang="lilypond" ; {
 \clef bass \key c \major \cadenzaOn
 \tweak font-size #-2 c,1 \finger \markup \text "V"
 e,1 \glissando g1
 \tweak font-size #-2 bes1
 \ottava #-1
 \tweak font-size #-2 bes,,1 ^ \markup "pedals" \finger \markup \text "1"
 \glissando
 \tweak font-size #-2 e,,1 \finger \markup \text "7 (poss.)"
 \tweak font-size #-2 c,,1 \finger \markup \text "V (poss.)"
 } ;/score ;Range of the B♭ contrabass trombone; notes marked "V" require an F valve.
The range of the original B♭ contrabass trombone demanded by Wagner extends to E1. With a valve in F the range extends to C1, although some instruments with a shorter slide cannot always reach the C1 at full extent, and B0 above the B♭0 pedal is unobtainable. These notes are not missing on the modern F contrabass, which can access the lowest useful range of the double slide contrabass.
Repertoire.
After Wagner's reinvention of the B♭ contrabass trombone for the "Ring" cycle, it has occasionally been used by other 20th century composers. In Germany, composer Richard Strauss wrote for it in his opera "Elektra" (1908), and Arnold Schoenberg scored "Gurre-Lieder"' (1913) for a section of seven trombones including alto and contrabass. French composer Vincent D'Indy, inspired by performances of Wagner's "Ring" cycle, wrote for it in several of his later works, including his last two symphonies. It has also been called for in works by composers Gustav Holst, Havergal Brian, Alban Berg, Anton Webern, Edgard Varèse, György Ligeti, and Pierre Boulez. Despite this, the contrabass trombone did not earn a permanent seat in the opera or symphony orchestra.
Since the late 1980s the contrabass trombone has appeared in orchestral works by Harrison Birtwistle, Sofia Gubaidulina, Hans Werner Henze, and Manfred Trojahn. It has also enjoyed a revival particularly in film and video game soundtracks, due to the influence of Los Angeles session players Phil Teele, Bill Reichenbach, Bob Sanders and others. The contrabass trombone first appeared in film music in Jerry Goldsmith's score for "Planet of the Apes" (1968), played by Phil Teele. The popularisation of loud, low-brass heavy orchestral music in films and video games like the remake of "Planet of the Apes" (2001), "Call of Duty" (2003) and "Inception" (2010) has made the contrabass trombone nearly ubiquitous, and bass trombonists are now routinely required to double on contrabass for soundtrack session work.
In jazz, the contrabass trombone can sometimes be employed to play the fourth (bass) trombone parts in big bands. Maria Schneider has written for it in several of her works, featuring on her 2007 "Sky Blue" and 2017 "The Thompson Fields" albums.
Performance.
The double-slide contrabass trombone in B♭ is taxing to play, even with modern instruments. It is unwieldy, being about twice as heavy as a tenor or bass trombone, and its cylindrical bore is less efficient than a similar-pitched tuba, requiring more air to produce a good sound. The F contrabass is more agile, since for much of its range it has a shorter air column and, like the bass trombone, has two valves which allow access to more alternate positions. Nonetheless, like the tuba, the instrument is better suited as the contrabass voice of harmonic material in an ensemble, rather than virtuoso or solo passages.
The use of a contrabass trombone in an orchestra is usually as an additional fourth