Editing Trombone (section)

=== Twentieth century ===
{{listen|type=music|title="Miss Trombone"
|description=1908 ragtime by [[Henry Fillmore]]; played by The Indestructible Military Band
|filename=Fillmore, Henry - Miss Trombone (1911).ogg}}
[[File:Newsboy Military Band Member with Trombone, Toledo, Ohio - DPLA - 6b52b39cf72038f9058254142eef1e79 (page 1) (cropped).jpg|thumb|right|Newsboy Military Band Member with Trombone, Toledo, Ohio]]

With the rise of recorded music and music schools, orchestral trombone sections around the world began to have a more consistent idea of a standard trombone sound. In the 1940s, British orchestras abandoned the use of small bore tenors and G basses in favor of the American/German choice of large bore tenors and B{{Music|flat}} basses. French orchestras did the same in the 1960s.

==== 20th-century wind bands ====
During the first half of the 20th century the popularity of touring and community concert bands in the United States decreased. At the same time, the development of music education in the public school system made high-school and university concert bands and marching bands ubiquitous. A typical concert band trombone section consists of two tenor trombones and one bass trombone, but using multiple players per part is common practice, especially in public-school settings.{{Citation needed|date=March 2020}}

==== Use in jazz ====
{{further|List of jazz trombonists}}
In the 1900s the trombone and the tuba played bass lines and outlined chords to support improvisation by the higher-pitched instruments. It began to be used as a solo instrument during the swing era of the mid-1920s. [[Jack Teagarden]] and [[J.&nbsp;J. Johnson]] were early trombone soloists.<ref name="Bernotas">{{cite web |last1=Bernotas |first1=Bob |title=Trombone |url=https://www.allaboutjazz.com/trombone-by-bob-bernotas |website=All About Jazz |access-date=29 August 2022 |date=7 September 2015 }}</ref><ref name="Wilken">{{cite web |last1=Wilken |first1=David |title=The Evolution of the Jazz Trombone: Part One |url=https://www.trombone.org/articles/view.php?id=89 |website=trombone.org |access-date=29 August 2022 }}</ref>

==== 20th-century construction ====
The trombone's construction changed in the 20th century. Different materials were used, mouthpiece, bore, and bell dimensions increased, and different mutes and valves were developed. Despite the overall trend towards larger bore instruments, many European trombone makers prefer a slightly smaller bore than their American counterparts.

One of the most significant changes was the development of the F-attachment trigger. Through the mid-20th century there was no need for orchestral trombonists to use instruments with the F attachment trigger. As contemporary composers such as Mahler began to write lower passages for the trombone, the trigger became necessary.