Bottleneck guitar [slide guitar]
- Allison A. Alcorn
Style of playing either acoustic or electric guitar. The guitarist places a tube on one left-hand finger, usually the pinky, and presses this ‘slide’ onto the steel string to vary pitch. The slide is moved along the string without lifting, creating portamento from pitch to pitch. In this style, the guitar’s frets become nonfunctional, though some guitarists use their free fingers to fret as well. ‘Bottleneck’ refers to the neck of a glass bottle, originally used for the slides. Modern slides can be made of glass, glass on the outside and ceramic on the inside to prevent slipping, or non-shattering material such as brass or polyvinyl chloride (PVC) pipe. The material of the slide affects the timbre; for instance, heavier glass produces a richer, fuller tone, while the iron oxide in green glass creates a loud, sharp tone that is still warmer than cobalt oxide in blue glass. Metals, which generate a very bright tone, are used mostly with electric guitars. In bottleneck playing the guitar is held in the usual guitar position, whereas the lap slide guitar is played belly up, back flat on the player’s lap....