Editing Effects unit (section)

===Dynamics===
[[File:Comp. rack (Supernatural).jpg|thumb|upright|A rack of [[rackmount]] audio compressors in a recording studio. From top to bottom: Retro Instruments/Gates STA level; Spectra Sonic; [[Dbx (noise reduction)|Dbx]] 162; Dbx 165; [[Empirical Labs Distressor]]; Smart Research C2; Chandler Limited TG1; Daking FET (91579); and [[Altec Lansing|Altec]] 436c.]]

Also called volume and [[amplitude]] effects, dynamics effects modify the volume of an instrument. Dynamics effects were among the first effects introduced to guitarists.<ref name="art" />

''Boost/volume pedal'': When activated, a ''boost'' or ''clean boost'' pedal amplifies the volume of an instrument by increasing the [[amplitude]] of its [[audio signal]]. These units are generally used for ''boosting'' volume during solos and preventing signal loss in long effects chains. A guitarist switching from rhythm guitar to lead guitar for a [[guitar solo]] may use a boost to increase the volume of their solo.<ref>Hunter, Dave (2004). [https://books.google.com/books?id=7DjYrk7Vap4C ''Guitar Effects Pedals: The Practical Handbook'']. Hal Leonard. p. 23.</ref>

Volume effects: [[Electro-Harmonix]] LPB-1, Fender Volume Pedal, [[MXR Micro Amp]], [[Ernie Ball Inc.|Ernie Ball]] Volume Pedal.<!--This article has often been used to advertise. Add only list products that 1.) have Wikipedia articles and 2. ) have been very known for a number of years and used by influential musicians--> [[Treadle]]-based volume pedals are used by electric instrument players (guitar, bass, keyboards) to adjust the volume of their instrument with one foot while their hands are being used to play their instrument. Treadle-style volume pedals are often also used to create swelling effects by removing the attack of a note or chord, as popularised by [[pedal steel guitar]] players. This enables electric guitar and pedal steel players to imitate the soft swelling sound that an orchestra [[string section]] can produce, in which a note or chord starts very softly and then grows in volume. Treadle-based volume pedals do not usually have batteries or require external power.

''[[Dynamic range compression|Compressor]]'': Compressors make loud sounds quieter and quiet sounds louder by decreasing or ''compressing'' the [[dynamic range compression|dynamic range]] of an [[audio signal]].<ref name="Reese">{{Cite book|last1=Reese|first1=David|last2=Gross|first2=Lynne|last3=Gross|first3=Brian|title=Audio Production Worktext: Concepts, Techniques, and Equipment|publisher=Focal Press|year=2009|page=[https://archive.org/details/audioproductionw0000rees/page/149 149]|url=https://archive.org/details/audioproductionw0000rees|url-access=registration|isbn=978-0-240-81098-0}}</ref> A compressor is often used to stabilize volume and alter the sound of a note's ''attack''. With extreme settings of its controls, a compressor can function as a [[limiter]].<ref name="google23">Hunter, D (2004). [https://books.google.com/books?id=7DjYrk7Vap4C ''Guitar Effects Pedals: The Practical Handbook'']. Hal Leonard. p. 23.</ref>

Compressor effects: [[Robert Keeley (instrument maker)|Keeley Compressor]], [[MXR Dyna Comp]], [[Boss Corporation|Boss CS-3 Compression Sustainer]].<!--This article has often been used to advertise. List only products that 1.) have Wikipedia articles and 2.) have been well known for a number of years and used by influential musicians-->

''[[Noise gate]]'': Noise gates [[attenuate]] hum, hiss, and static in the signal by greatly diminishing the volume when the signal falls below a set threshold. Noise gates are [[Dynamic range compression#Types|expanders]]—meaning that, unlike compressors, they increase the [[dynamic range compression|dynamic range]] of an [[audio signal]] to make quiet sounds even quieter.<ref name="Reese" /> If used with extreme settings and combined with reverb, they can create unusual sounds, such as the [[gated reverb|gated drum effect]] used in 1980s pop songs, a style popularized by the [[Phil Collins]] song ''[[In the Air Tonight]]''.<ref>Louie, Gary J.; White, Glenn D. (2005). [https://books.google.com/books?id=DulVm8t88QkC ''The Audio Dictionary''], University of Washington Press. p. 171.</ref><ref>{{cite magazine |last=Flans |first=Robyn |url=http://mixonline.com/mag/audio_phil_collins_air/ |title=Classic Tracks: Phil Collins' "In the Air Tonight" |archive-url=https://web.archive.org/web/20110303210034/http://mixonline.com/mag/audio_phil_collins_air/ |archive-date=3 March 2011 |magazine=Mix |date=1 May 2005}}</ref>

Noise gate effects: [[Boss Corporation|Boss NS-2 Noise Suppressor]].