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This is a list of the fundamental frequencies in hertz (cycles per second) of the keys of a modern 88-key standard or 108-key extended piano in twelve-tone equal temperament, with the 49th key, the fifth A (called A 4), tuned to 440 Hz (referred to as A440). [1] [2] Every octave is made of twelve steps called semitones.
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 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).
Pressing a key on the keyboard makes the instrument produce sounds—either by mechanically striking a string or tine (acoustic and electric piano, clavichord), plucking a string (harpsichord), causing air to flow through a pipe organ, striking a bell , or activating an electronic circuit (synthesizer, digital piano, electronic keyboard).
Keys Key size Preset Tones Polyphony (notes) Batteries MIDI Notes References ... (61 key), WK-7500 (76 keys) in 2010, 7.0w speakers ... 61 Piano-style 400 48
The series also started model naming system that lasted till the end of Triton line production, with standard model (61-key), Pro (76-key) and ProX (88-key with piano-style weighted keyboard). Korg Wavestation EX Upgraded Wavestation with additional waves (samples) and effect programs.
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