In addition to their roles of rhythmic and harmonic accompaniment, guitars are well-suited to performing solo lines. This can take the form of a prominent section where the guitar is heard over other instruments, or unaccompanied, the guitarist providing all the necessary melody and harmony themselves. Many times, a guitar solo is a virtuosic performance in the rock music idiom with a heavily-overdriven electric guitar. However, solo instrumentation for the guitar can be found in a wide variety of musical styles and eras.