The tuba is the name for several brass wind instruments in the bass register. Instruments classified under the tuba family include the euphonium (sometimes called a tenor tuba) and the (bass) tubas (tuned in F, E♭, C, or B♭). In many languages, ‘tuba’ generally refers to a bass tuba when unspecified. However, in amateur brass bands in the Netherlands and Belgium, it’s common to use the term ‘tuba’ to refer to a euphonium.