text: In his A New History of the Double Bass , Paul Brun asserts , with many references , that the double bass has origins as the true bass of the violin family .
simplified: Double bass players in jazz bands or rock bands often connect their double bass to an electronic amplifier and a loudspeaker , to make a louder , stronger sound . This makes it easier for the double bass player , the other musicians , and the audience to hear the double bass 's musical notes .