is less prone to audio feedback than the double bass when amplified. To use a bow with an EUB, both the bridge and fingerboard must be radiussed (given a curve). EUBs are much easier to transport to gigs, or fly with on tours than a large, fragile double bass. Electric bass The electric bass is a relative newcomer to the world of jazz. Until the 1950s, the double bass was used to anchor jazz ensembles from small combos to huge big bands. The electric bass was introduced in the early 1950s when Roy Johnson (and later Monk Montgomery) first used the instrument in Lionel Hampton's big band. When the electric bass is used in jazz, it has both an accompaniment and a soloing role. When the bass is used to accompany, it may be used to perform walking basslines for traditional tunes and jazz standards, in smooth quarter note lines that imitate the sound of the double bass. The electric bass player can play all of the same types of bass lines played by her upright bass cousin. However, due to the design of the electric bass as a guitar-family instrument, it is possible to play rapid bass lines that would be impossible on an upright bass. For example, an electric bassist in a fusion or Latin band can play a bassline composed entirely of rapid, syncopated sixteenth notes. For Latin or salsa tunes and rock-infused jazz fusion tunes, the electric bass may play challenging, fast-moving rhythmic figures in coordination with the drummer, or lay down a low, heavy groove. In a fusion band, electric bass players have to provide a solid, heavy bass foundation for the band while a drummer, electric guitarist (amplified through a guitar amp) and synthesizer or electric piano player performing (amplified through a keyboard amp) are all playing. As well, fusion bands are more likely to play a rock-size venue, such as a large club or theatre, than a small jazz club. To provide a good bass sound, a fusion electric bass player will often use a powerful bass amplifier and a larger speaker cabinet than an upright player would use, such as a 4X10" cabinet, or even two 4X10" cabinets. In a jazz setting, the electric bass tends to have much a much more expansive solo role than in most popular styles. In most rock settings, the bass guitarist may only have a few