Editing Audio feedback (section)

===Devices===
[[File:Thomas Organ Cry Baby & Boss DF-2 Super Feedbacker & Distortion.jpg|thumb|right|200px|The Boss DF-2 Super Feedbacker and Distortion pedal (on the left) helps electric guitarists to create feedback effects.]]
The principle of feedback is used in many guitar sustain devices. Examples include handheld devices like the [[EBow]], built-in guitar pickups that increase the instrument's sonic sustain, and sonic transducers mounted on the head of a guitar. Intended closed-circuit feedback can also be created by an [[effects unit]], such as a delay pedal or effect fed back into a [[mixing console]]. The feedback can be controlled by using the fader to determine a volume level. The Boss DF-2 Super Feedbacker and Distortion pedal is an electronic effect unit that helps electric guitarists create feedback effects.<ref>{{cite web |title=Boss DF-2 SUPER Feedbacker & Distortion |date=2 March 2020 |url=https://bossarea.com/boss-df-2-super-feedbacker-distortion/ |access-date=2021-10-13}}</ref> The [[halldorophone]] is an electro-acoustic string instrument specifically made to work with string based feedback.<ref>[http://www.nime.org/proceedings/2018/nime2018_paper0058.pdf The halldorophone: The ongoing innovation of a cello-like drone instrument]</ref>