Various combinations of trumpets have been used together for hundreds of years. The compositions of Biber and Altenburg opened up the potential to form trumpet ensembles. Some pieces are for ensemble with keyboard but most are for ensemble alone making them very portable and useful at a variety of events. Many of the arrangements for 2 Trumpets and Keyboard have extra keyboard scores written in different keys so that the piece can be played in B-flat, C or D depending on the abilities of the performers.