Sackbut eighteenth century; when it returned, the Italian term "trombone" became dominant. In modern English, an older trombone or its replica is called a sackbut. An older instrument generally differs from modern trombones by its smaller, more cylindrically-proportioned bore, and its less-flared bell. The bell section was more resonant (since it did not contain the tuning slide and was loosely stayed rather than firmly braced to itself). These traits produce a "covered, blended sound which was a timbre particularly effective for working with voices... zincks and crumhorns", as in an alta capella. The revived instrument had changed in specific ways. In
Musical Instrument Museum (Brussels) instruments are shown in the basement, traditional instruments on the ground floor, the development of the modern orchestral instruments on the first floor, and keyboard and stringed instruments on the second floor. Visitors are given infrared headphones in order to listen to almost 200 musical extracts of the instruments on display. Information is provided in French and Dutch, though not in English. Among the notable pieces of the collection are the famous Rottenburgh Alto recorder, instruments invented by Adolphe Sax, a unique set of giant Chinese stone chimes, and the only existing copy of the luthéal, an instrument used by