the tuba is a member of what instrument family
Tuba The tuba (UK: /ˈtjuːbə/ or US: /ˈtuːbə/;[1] Italian pronunciation: [ˈtuːba]) is the largest and lowest-pitched musical instrument in the brass family. Like all brass instruments, sound is produced by moving air past the lips, causing them to vibrate or "buzz" into a large cupped mouthpiece. It first appeared in the mid 19th-century, making it one of the newer instruments in the modern orchestra and concert band. The tuba largely replaced the ophicleide.[2] Tuba is Latin for 'trumpet'.[3]
String section There are more variations of set-up with the double bass section, depending on the size of the section and the size of the stage. The basses are commonly arranged in an arc behind the cellos, either standing or sitting on high stools, usually with two players sharing a stand; though occasionally, due to the large width of the instrument, it is found easier for each player to have their own stand. There are not usually as many basses as cellos, so they are either in one row, or for a larger section, in two rows, with the second row behind the first. In some orchestras, some or all of the string sections may be placed on wooden risers, which are platforms that elevate the performers.