Shred guitar is a virtuosic style of electric guitar performance. Categorized by its use of advanced techniques, shredding is a complex art form. Shred guitar includes fast alternate picking, sweep-picking, diminished and harmonic minor scales, tapping, and whammy bar use. Often incorporated in heavy metal, guitarists employ a guitar amplifier and a range of effects such as distortion. This creates a sustained guitar tone and may facilitate guitar feedback.

A vibrato system on a guitar is a mechanical device used to temporarily change the pitch of the strings. It adds vibrato to the sound by changing the tension of the strings, typically at the bridge or tailpiece of an electric guitar using a controlling lever, which is alternately referred to as a whammy bar, vibrato bar, or tremolo arm. The lever enables the player to quickly and temporarily vary the tension and sometimes length of the strings, changing the pitch to create a vibrato, portamento, or pitch bend effect. Instruments without a vibrato have other bridge and tailpiece systems.