What is slide gitar?

Slide guitar is a technique that involves playing a guitar with a slide, which is usually a cylindrical or tapered tube made of glass, metal, or ceramic. The player holds the slide against the strings and moves it up and down the length of the fretboard to produce a unique sound.

Slide guitar is commonly used in blues, rock, and country music. It was popularized in the early 20th century by blues and country musicians such as Robert Johnson and Delta blues artists.

In addition to the use of a slide, slide guitar techniques can also involve alternate tunings, string dampening, and muting. Some famous slide guitar players include Duane Allman, Derek Trucks, and Ry Cooder.