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The console of the organ in Salem Minster in Salem, Germany (Wilhelm Schwarz, 1901).[1] The expression pedal is clearly visible directly above the pedalboard.
An expression pedal is an important control found on many musical instruments including organs, electronic keyboards, and pedal steel guitar. The musician uses the pedal to control different aspects of the sound, commonly volume. Separate expression pedals can often be added to a guitar amplifier or effects unit and used to control many different aspects of the tone.
Because the source of power with a pipe organ and electronic organs is not generated by the organist, the volume of these instruments has no relationship with how hard its keys or pedals are struck; i.e., the organ produces the same volume whether the key or pedal is depressed gently or firmly. Moreover, the tone will remain constant in pitch, volume, and timbre until the key or pedal is lifted, at which point the sound stops. The expression pedal gives the organist control over the external source of power, and thus the volume, of the instrument, while leaving the user's hands free.
This system of dynamic control is completely distinct from the act of adding stops (in the case of pipe organs) or pulling more drawbars (in the case of organs and synthesizers). Furthermore, the expression pedal can influence the volume (and, to a lesser degree, the timbre) of a note while it is being played; unlike other instruments, in which the note typically decays after it is first sounded, the organist can increase the strength of a chord or note as it sounds by increasing pressure on the expression pedal.
An organ expression pedal is typically a large pedal, resembling an oversized automobile accelerator, either partially or fully recessed within the organ console and located either directly above or to the right of the organ's pedalboard. As the pedal is pressed forward with the toes, the volume of the sound is increased; as it is depressed with the heel, the volume is decreased. A stand-alone expression pedal used with electronic keyboards, amplifiers, and effects is usually a smaller pedal made of metal or plastic that can be placed on the floor and then connected to the device with an instrument cable.
Swell box on the Holtkamp organ in Bishop W. Angie Smith Chapel, Oklahoma City University
An expressionpedal is an important control found on many musical instruments including organs, electronic keyboards, and pedal steel guitar. The musician...
also have a similar-looking crescendo pedal, found alongside any expressionpedals. Pressing the crescendo pedal forward cumulatively activates the stops...
pedal (or una corda), the sostenuto pedal, and the sustaining pedal (or damper pedal). Some pianos omit the sostenuto pedal, or have a middle pedal with...
area called the console or keydesk, which holds the manuals (keyboards), pedals, and stop controls. In electric-action organs, the console is often movable...
A sustain pedal or sustaining pedal (also called damper pedal, loud pedal, or open pedal) is the most commonly used pedal in a modern piano. It is typically...
A pedalboard (also called a pedal keyboard, pedal clavier, or, with electronic instruments, a bass pedalboard) is a keyboard played with the feet that...
produces such sounds in a variety of preset settings and adds expression control by the foot pedal. The Radiohead guitarists Ed O'Brien and Jonny Greenwood...
are deactivated). The crescendo pedal is located directly above the pedalboard, to the right of any expressionpedals that may be present. In actual use...
Comp, Electro-Harmonix Holy Grail, and Strymon El Capistan with an expressionpedal. Sometimes, he uses his amp's vibrato effect. Much of Speer's guitar...
Acoustic pianos have expressionpedals that change the response or tone of the instrument. On small upright pianos, the soft pedal (also called una corda...
design substructure with a built-in 13 note pedal-board, expressionpedal with footswitch, piano-sustain pedal and additional stereo amplification system...
with a piano), so overall volume is controlled by a pedal (also known as a "swell" or "expression" pedal). The keys on each manual have a lightweight action...
using eight switches and an expressionpedal. Earlier versions of the device contained only six switches and an expressionpedal, and did not support interfacing...
powered, replacing the reed organ's twin bellows pedals with a single swell (or "expression") pedal more like that of a pipe organ. Instead of having...
pedalboard onstage. The board also contains a pedal control which allows him to change the settings for his effect pedals. For the first two albums, he used Mesa...
Bass pedals are an electronic musical instrument with a foot-operated pedal keyboard with a range of one or more octaves. The earliest bass pedals from...
volume. This is normally set up once and then left, since the organ's expressionpedal normally controls the volume. Leslie recommended playing the organ...
one user preset to another with an expressionpedal. 2010 also marked Source Audio’s entry into the bass effects pedal market with the Soundblox and Soundblox...
first combo organ, it was only equipped with a single keyboard and an expressionpedal. 1966 — F-2 Another "pipe organ" model similar to the F-1, released...
organ notes are keyed when a string touches a specific segment. An expressionpedal is used to fade the organ sound in and out, while the guitar can be...
An effects unit, effects processor, or effects pedal is an electronic device that alters the sound of a musical instrument or other audio source through...
toggle switches, two foot-switchable buttons, an input, an output, CV/ expressionpedal input, and MIDI input. Another feature unique to Chase Bliss are the...
Yowamushi Pedal (Japanese: 弱虫ペダル, Hepburn: Yowamushi Pedaru, lit. "Weakling Pedal") is a Japanese manga series written and illustrated by Wataru Watanabe...
Muff Pi (π), often known simply as the Big Muff, is a "fuzzbox" effects pedal produced in New York City by the Electro-Harmonix company, along with their...
include MIDI in and out, AUX in and out, MIC in with adjustable gain. Expressionpedal input. Micro Genie V125 Rebranded version of JVC KB-808. Micro Genie...
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