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A keyboard matrix circuit is a design used in most electronic musical keyboards and computer keyboards in which the key switches are connected by a grid of wires, similar to a diode matrix. For example, 16 wires arranged in 8 rows and 8 columns can connect 64 keys—sufficient for a full five octaves of range (61 notes).
A Miracle system keyboard (NES edition) The Miracle Piano Teaching System consists of a keyboard, connecting cables, power supply, soft foot pedals, and software. The software comes either on 3.5" floppy disks for personal computers or on cartridges for video game consoles. After the supplied MIDI keyboard is connected to a console or computer ...
Yamaha P-250 digital piano. The Yamaha P-250 is a digital stage piano. [1] It was announced in mid-2003 as a replacement for the Yamaha P-200 and went to market shortly thereafter. The P-250 features various stereo piano samples, plus hundreds of other MIDI, General MIDI and XG sounds. It features 88 progressively-weighted keys, plus a built-in ...
The typical Disklavier is a real acoustic piano outfitted with electronic sensors for recording and electromechanical solenoids for player piano-style playback. Sensors record the movements of the keys, hammers, and pedals during a performance, and the system saves the performance data as a Standard MIDI File (SMF). On playback, the solenoids ...
Typing on a laptop keyboard. A computer keyboard is a built-in or peripheral input device modeled after the typewriter keyboard [1] [2] which uses an arrangement of buttons or keys to act as mechanical levers or electronic switches.
Action can refer to that of a piano or other musical keyboards, including the electronic or digital stage piano and synthesizer, on which some models have "weighted keys", which simulate the touch and feel of an acoustic piano. The design of the key action mechanism determines the "weight" of the keys, i.e., the force required to sound a note ...
[citation needed] Modern piano keyboards ordinarily have an octave span of 164–165 mm (6.46–6.50 in), resulting in the width of black keys averaging 13.7 mm (0.54 in) and white keys about 23.5 mm (0.93 in) at the base, disregarding space between keys.
The earliest known keyboard instrument was the Ancient Greek hydraulis, a type of pipe organ invented in the third century BC. [2] The keys were likely balanced and could be played with a light touch, as is clear from the reference in a Latin poem by Claudian (late 4th century), who says magna levi detrudens murmura tactu . . . intonet, that is "let him thunder forth as he presses out mighty ...