Editing EMS VCS 3 (section)

===Keyboards controller===
[[Image:EMS VCS 3 synthesizer (1969, SN 297) & DK-1 keyboard (1969), Musée de la Musique de Paris.jpg|thumb|'''DK1 keyboard controller''' (front) <br/>connected to VCS 3 (rear)]]

Although the VCS 3 is often used for generating [[sound effect]]s due to lack of a built-in [[musical keyboard|keyboard]], external keyboard controllers were available for melodic play. The ''DK1,'' produced in 1969, is an early velocity-sensitive monophonic keyboard for VCS 3 with an extra [[Voltage-controlled oscillator|VCO]] and [[Voltage-controlled amplifier|VCA]].<ref name="dk1" group="#">
{{cite web
 | title     = DK1 (aka The Cricklewood) – The Products
 | url       = http://www.ems-synthi.demon.co.uk/emsprods.html#dk1
 | archive-url= https://web.archive.org/web/20131031040324/http://www.ems-synthi.demon.co.uk/emsprods.html#dk1
 | archive-date=2013-10-31
 | publisher = Electronic Music Studios (Cornwall)
}}</ref> In 1972 it was extended for [[Polyphony and monophony in instruments#Duophonic|duophonic]] play as ''DK2''.<ref name=dk2 group="#">
{{cite web
 | title     = DK2 – The Products
 | url       = http://www.ems-synthi.demon.co.uk/emsprods.html#dk2
 | archive-url= https://web.archive.org/web/20131031040324/http://www.ems-synthi.demon.co.uk/emsprods.html#dk2
 | archive-date=2013-10-31
 | publisher = Electronic Music Studios (Cornwall)
}}</ref>  Also in 1972, the [[EMS Synthi AKS|Synthi AKS]] was released, as well as a digital [[music sequencer|sequencer]] with a [[touch-sensitive]] flat keyboard, the ''KS sequencer'',<ref name=ks group="#">
{{cite web
 | title     = KS – The Products
 | url       = http://www.ems-synthi.demon.co.uk/emsprods.html#ks
 | archive-url= https://web.archive.org/web/20131031040324/http://www.ems-synthi.demon.co.uk/emsprods.html#ks
 | archive-date=2013-10-31
 | publisher = Electronic Music Studios (Cornwall)
}}</ref> and its mechanical keyboard version, ''DKS.''<ref name=dks group="#">
{{cite web
 | title     = DKS – The Products
 | url       = http://www.ems-synthi.demon.co.uk/emsprods.html#dks
 | archive-url= https://web.archive.org/web/20131031040324/http://www.ems-synthi.demon.co.uk/emsprods.html#dks
 | archive-date=2013-10-31
 | publisher = Electronic Music Studios (Cornwall)
}}</ref>