Answer:True
Step-by-step explanation:
A bluegrass band is a group of musicians who play acoustic stringed instruments, typically some combination of guitar, mandolin, fiddle, banjo, dobro and upright bass, to perform bluegrass music.
Unlike mainstream country music, bluegrass is traditionally played on acoustic stringed instruments. The fiddle, five-string banjo, guitar, mandolin, and upright bass (string bass) are often joined by the resonator guitar (also referred to as a Dobro) and (occasionally) harmonica or Jew's harp.