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The word "manual" is used instead of the word "keyboard" when referring to any hand-operated keyboard on a keyboard instrument that has a pedalboard (a keyboard on which notes are played with the feet), such as an organ; or when referring to one of the keyboards on an instrument that has more than one hand-operated keyboard, such as a two- or three-manual harpsichord. (On instruments that have neither a pedalboard nor more than one hand-operated keyboard, the word "manual" is not a synonym for "keyboard".)
Music written to be played only on the manuals (and not using the pedals) can be designated by the word manualiter (first attested in 1511, but particularly common in the 17th and 18th centuries). [1]
Organs and synthesizers can, and usually do, have more than one manual; most home instruments have two manuals, while most larger organs have two or three. Elaborate pipe organs and theater organs can have four or more manuals. The manuals are set into the organ console (or "keydesk").
The layout of a manual is roughly the same as a piano keyboard, with long, usually ivory or light-colored keys for the natural notes of the Western musical scale, and shorter, usually ebony or dark-colored keys for the five sharps and flats. A typical, full-size organ manual consists of five octaves, or 61 keys. Piano keyboards, by contrast, normally have 88 keys; some electric pianos and digital pianos have fewer keys, such as 61 or 73 keys. Some smaller electronic organs may have manuals of four octaves or less (25, 49, 44, or even 37 keys). Changes in registration through use of drawknobs, stop tabs, or other mechanisms to control organ stops allow such instruments to achieve an aggregate range well in excess of pianos and other keyboard instruments even with manuals of shorter pitch range and smaller size.
On smaller electronic organs and synthesizers, the manuals may span fewer octaves, and they may also be offset, with the lower one an octave to the left of the upper one. This arrangement encourages the organist to play the melody line on the upper manual while playing the harmony line, chords or bassline on the lower manual. On pipe organs each manual plays a specific subset of the organ's stops, and electric organs (e.g., Hammond organ) can emulate this style of play. Hammond organs differ from pipe organs in that pipe organs can only pull a stop out (that is, turn on a stop) or push it in (turning off this stop); in contrast, Hammond organs typically have drawbars, so that the player can control how much of each "pipe rank" (e.g., 16 ft, 8 ft, 4 ft 2 ft, etc.) they wish to use. Synthesizers can program separate manuals to emulate sounds of various orchestral sections or instruments, using imitative digital sounds or sampling of real instruments, or using entirely synthesized sounds. On digital synthesizer instruments a performer can produce the sounds of an entire orchestra through the use of all available manuals in conjunction with the pedalboard and the various registration controls.
Despite the superficial resemblance to piano keyboards, organ manuals require a very different style of playing. Organ keys often require less force to depress than piano keys; however, the keys on mechanical instruments can be very heavy (St Sulpice Paris, St Ouen Rouen, St Etienne Caen, etc.). When depressed, an organ key continues to sound its note at the same volume until the organist releases the key, unlike a piano key, whose note gradually fades away as the string vibrations fade away. On the other hand, while the pianist may allow the piano notes to continue to sound for a few moments after lifting their hands from the keys by depressing the sustain pedal, most organs have no corresponding control; the note invariably ceases when the organist releases the key. The exception is some modern electronic instruments and relatively contemporary upgrades to theatre pipe organ consoles, which may have a knee lever which sustains the previous chords or notes. The knee lever enables an organist to hold a chord or note during a fermata or cadence, thus freeing their hands to turn a page in the sheet music, change stops, conduct a choir or orchestra, or shift hands to another manual.
Another difference is that of dynamic control. Unlike the case of piano keys, the force with which the organist depresses the key has no relation to the note's resonance; instead, the organist controls the volume through use of the expression pedals. While the piano note, then, can only decay, the organ note may increase in volume or undergo other dynamic changes. Some modern electronic instruments allow for volume to vary with the force applied to the key and permit the organist to sustain the note and alter both its attack and decay in a variety of ways. For example, Hammond organs often have an expression pedal, which enables the performer to increase or decrease the volume of a note, chord, or passage. All of these variables mean that both the technique of organ playing and the resulting music are quite different from those of the piano. Nevertheless, the trained pianist may play a basic organ repertoire with little difficulty, although more advanced organ music will require specialized training and practice, as the musician has to learn to play on multiple manuals, set stops and other controls while performing, and play the pedal keyboard with the feet.
One of the key types of electromechanical organs, the Hammond B-3, has two manuals. Each manual has drawbars which are used to control the registration for each manuals.
Different manuals on pipe organs are usually used to play stops from a variety of divisions, which group together a series of different tones. Divisions are usually standardised within pipe organs belonging to certain regions; in the English school of organ building, common divisions include the Great, Swell, Choir, Solo and Echo, while French organs commonly include Grand Orgue, Positif, Récit and Echo. German organ divisions include the Hauptwerk, Rückpositiv, Brustwerk and Oberwerk, while in Dutch, common divisions are Hoofdwerk, Rugwerk, Borstwerk and Bovenwerk. Finally, theatre organs are usually composed of Great, Accompaniment, Solo, Bombarde and Orchestral divisions. Organ builders choose different divisions to accommodate the type of music played, the space in which the organ is installed, as well as the desired character and tone of the instrument.
Various other controls, such as stops, pistons, and registration presets are usually located adjacent to the manuals to allow the organist ready access to them while playing. This further increases the instrument's versatility, as a piston or other preset function can cause multiple stops to be pulled out or pushed in automatically. This is of particular benefit in pieces where a number of stops have to be pulled out or pushed in between sections. Devices known as couplers are sometimes available to link the manuals, so that the stops (and pipes) normally played on one can be played from another.
The Hammond organ is an electric organ invented by Laurens Hammond and John M. Hanert and first manufactured in 1935. Multiple models have been produced, most of which use sliding drawbars to vary sounds. Until 1975, Hammond organs generated sound by creating an electric current from rotating a metal tonewheel near an electromagnetic pickup, and then strengthening the signal with an amplifier to drive a speaker cabinet. The organ is commonly used with the Leslie speaker.
A harpsichord is a musical instrument played by means of a keyboard. This activates a row of levers that turn a trigger mechanism that plucks one or more strings with a small plectrum made from quill or plastic. The strings are under tension on a soundboard, which is mounted in a wooden case; the soundboard amplifies the vibrations from the strings so that the listeners can hear it. Like a pipe organ, a harpsichord may have more than one keyboard manual, and even a pedal board. Harpsichords may also have stop buttons which add or remove additional octaves. Some harpsichords may have a buff stop, which brings a strip of buff leather or other material in contact with the strings, muting their sound to simulate the sound of a plucked lute.
A musical keyboard is the set of adjacent depressible levers or keys on a musical instrument. Keyboards typically contain keys for playing the twelve notes of the Western musical scale, with a combination of larger, longer keys and smaller, shorter keys that repeats at the interval of an octave. Pressing a key on the keyboard makes the instrument produce sounds—either by mechanically striking a string or tine, plucking a string (harpsichord), causing air to flow through a pipe organ, striking a bell (carillon), or activating an electronic circuit. Since the most commonly encountered keyboard instrument is the piano, the keyboard layout is often referred to as the piano keyboard or simply piano keys.
The pipe organ is a musical instrument that produces sound by driving pressurised air through the organ pipes selected from a keyboard. Because each pipe produces a single pitch, the pipes are provided in sets called ranks, each of which has a common timbre, volume, and construction throughout the keyboard compass. Most organs have many ranks of pipes of differing pitch, timbre, and volume that the player can employ singly or in combination through the use of controls called stops.
In music, the organ is a keyboard instrument of one or more pipe divisions or other means for producing tones. The organs have usually two or three, up to five, manuals for playing with the hands and a pedalboard for playing with the feet. With the use of registers, several groups of pipes can be connected to one manual.
An electronic keyboard, portable keyboard, or digital keyboard is an electronic musical instrument based on keyboard instruments. Electronic keyboards include synthesizers, digital pianos, stage pianos, electronic organs and digital audio workstations. In technical terms, an electronic keyboard is a rompler-based synthesizer with a low-wattage power amplifier and small loudspeakers.
Bassline is the term used in many styles of music, such as blues, jazz, funk, dub and electronic, traditional, and classical music, for the low-pitched instrumental part or line played by a rhythm section instrument such as the electric bass, double bass, cello, tuba or keyboard.
An organ stop is a component of a pipe organ that admits pressurized air to a set of organ pipes. Its name comes from the fact that stops can be used selectively by the organist; each can be "on", or "off".
Farfisa is a manufacturer of electronics based in Osimo, Italy, founded in 1946. The company manufactured a series of compact electronic organs in the 1960s and 1970s, including the Compact, FAST, Professional and VIP ranges, and later, a series of other keyboard instruments. They were used by a number of popular musicians including Sam the Sham, Country Joe and the Fish, Pink Floyd, Sly Stone, Blondie, and the B-52s.
An electric organ, also known as electronic organ, is an electronic keyboard instrument which was derived from the harmonium, pipe organ and theatre organ. Originally designed to imitate their sound, or orchestral sounds, it has since developed into several types of instruments:
A pedalboard is a keyboard played with the feet that is usually used to produce the low-pitched bass line of a piece of music. A pedalboard has long, narrow lever-style keys laid out in the same semitone scalar pattern as a manual keyboard, with longer keys for C, D, E, F, G, A, and B, and shorter, raised keys for C♯, D♯, F♯, G♯ and A♯. Training in pedal technique is part of standard organ pedagogy in church music and art music.
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 the 1970s consisted of a pedalboard and analog synthesizer tone generation circuitry packaged together as a unit. The bass pedals are plugged into a bass amplifier or PA system so that their sound can be heard. Since the 1990s, bass pedals are usually MIDI controllers, which have to be connected to a MIDI-compatible computer, electronic synthesizer keyboard, or synth module to produce musical tones. Some 2010s-era bass pedals have both an onboard synth module and a MIDI output.
Keyboard expression is the ability of a keyboard musical instrument to change tone or other qualities of the sound in response to velocity, pressure or other variations in how the performer depresses the keys of the musical keyboard. Expression types include:
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.
A MIDI keyboard or controller keyboard is typically a piano-style electronic musical keyboard, often with other buttons, wheels and sliders, used as a MIDI controller for sending Musical Instrument Digital Interface (MIDI) commands over a USB or MIDI 5-pin cable to other musical devices or computers. MIDI keyboards lacking an onboard sound module cannot produce sounds themselves, however some models of MIDI keyboards contain both a MIDI controller and sound module.
Polyphony is a property of musical instruments that means that they can play multiple independent melody lines simultaneously. Instruments featuring polyphony are said to be polyphonic. Instruments that are not capable of polyphony are monophonic or paraphonic.
The pedal piano is a kind of piano that includes a pedalboard, enabling bass register notes to be played with the feet, as is standard on the organ.
The pipe organ is played from an area called the console or keydesk, which holds the manuals (keyboards), pedals, and stop controls. In electric-action organs, the console is often movable. This allows for greater flexibility in placement of the console for various activities. Some very large organs, such as the van den Heuvel organ at the Church of St. Eustache in Paris, have more than one console, enabling the organ to be played from several locations depending on the nature of the performance.
Finger substitution is a playing technique used on many different instruments, ranging from stringed instruments such as the violin and cello to keyboard instruments such as the piano and pipe organ. It involves replacing one finger which is depressing a string or key with another finger to facilitate the performance of a passage or create a desired tone or sound. The simplest type of finger substitution is when a finger replaces another finger during a rest; the more difficult type is to replace one finger with another while a note is being played.
RIHA Adagio is a Dutch electronic organ with a built-in Leslie speaker and a fine wood finish. Similar to other RIHA organs, the Adagio was made by Benelux Musical Instruments, The Hague, the Netherlands. A fine member of those line of all-transistor Dutch organs that featured eight models in three console finishes - walnut, teak, and rosewood. All of them have standard features, including, but not limited to, pedal volume control, brilliance control, and reverberation. The Adagio is one of the once popular RIHA models, along with the Festivo, the Andante, and the Allegro.