Editing Accordion (section)

====Bellows====
{{Listen
|filename=AccordionBellowsSounds.ogg
|title=Accordion bellows controlled sounds
|description=A sample of effects that can be achieved with the bellows—949&nbsp;KB
|format=[[Ogg]]}}
[[File:Squeeze boxes accordion bandoneon concertina diatonic chromatic.jpg|thumb|265px|'''Bellows-driven instruments'''
{{ubl|item_style=margin-bottom: 0.5em
|Piano accordions: 1, 2, 13
|Diatonic button accordion: 3
|Chromatic button accordions: 11, 12, 14
|Digital accordions (V-Accordions, [[Roland Corporation]]): 11, 12, 13, 14
|[[Bandoneon]]: 4
|[[English concertina]]: 5
|[[Anglo concertina|Anglo-German concertinas]] (Anglo concertinas): 6, 7, 8, 9, 10}}]]
The [[bellows]] is the most recognizable part of the instrument, and the primary means of [[articulation (music)|articulation]]. The production of sound in an accordion is in direct proportion to the motion of the bellows by the player. In a sense, the role of the bellows can be compared to the role of moving a [[violin]]'s bow on bowed strings. For a more direct analogy, the bellows can be compared to the role of breathing for a singer. The bellows is located between the right- and left-hand keyboards, and is made from [[pleat]]ed layers of cloth and cardboard, with added leather and metal.<ref>[http://1accordion.net/bellows.htm How To Repair Bellows] Ike's Accordion</ref> It is used to create pressure and vacuum, driving air across the internal [[reed (instrument)|reeds]] and producing sound by their vibrations, applied pressure increases the volume.

The keyboard touch is not [[keyboard expression|expressive]] and does not affect [[Dynamics (music)|dynamics]]: all expression is effected through the bellows. Bellows effects include:
* Volume control, including swells and fades
* Repeated short, rapid changes of direction ("bellows shake"), which has been popularized{{dubious|date=May 2020}} by musicians such as [[Renato Borghetti]] ([[gaucho]] music) and [[Luiz Gonzaga]],<ref>{{cite web |url=http://www.allmusic.com/artist/luiz-gonzaga-mn0000316340 |title= Luiz Gonzaga:Biography by John Dougan |first=John |last=Dougan |website=All Music |publisher=RhythmOne group |archive-url=https://web.archive.org/web/20151130122258/http://www.allmusic.com/artist/luiz-gonzaga-mn0000316340/biography |archive-date=30 November 2015 |url-status=live |access-date=26 June 2017}}</ref> and extensively used in [[Forró]], called ''resfulego'' in Brazil
* Constant bellows motion while applying pressure at intervals
* Constant bellows motion to produce clear tones with no resonance
* Subtly changing the intonation to mimic the expressiveness of a singer
* Using the bellows with the silent air button gives the sound of air moving ("whooshing"), which is sometimes used in contemporary compositions for this instrument