A concert band, variously also called a wind ensemble, symphonic band, wind symphony, wind orchestra, wind band, symphonic winds, symphony band, or symphonic wind ensemble, is a performing ensemble consisting of members of the woodwind, brass, and percussion families of instruments, and occasionally including the double bass or bass guitar. On rare occasions, additional non-traditional instruments may be added to such ensembles such as piano, harp, synthesizer, or electric guitar.