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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).
C 4 (approximately 261.626 Hz [3]) may be called Low C by someone playing a Western concert flute, which has a higher and narrower playing range than the piano, while C 5 (523.251 Hz) would be middle C. This practice has led some to encourage standardizing on C 4 as the definitive middle C in instructional materials across all instruments. [4]
For example, "C" in Helmholtz's original notation [3] refers to the C two octaves below middle C, whereas "C" in ABC Notation refers to middle C itself. With scientific pitch notation, middle C is always C 4, and C 4 is never any note but middle C. This notation system also avoids the "fussiness" of having to visually distinguish between four ...
In a typical keyboard layout, black note keys have uniform width, and white note keys have uniform width and uniform spacing at the front of the keyboard. In the larger gaps between the black keys, the width of the natural notes C, D and E differ slightly from the width of keys F, G, A and B. This allows close to uniform spacing of 12 keys per ...
The workstation features a 61-note velocity-sensitive keyboard with aftertouch, a double density 3.5" floppy drive, a two line, 40 character LCD display, and a nine-track MIDI sequencer. It is a multitimbral synthesizer with 30-note polyphony and full MIDI capabilities. In addition to pitch and modulation wheels, the SY85 features eight ...
The inside of a Yamaha SY77 synthesizer shows the various internal components. The switches for each key are connected to the microprocessor chip using a matrix circuit. Even though the SY77 has 61 keys, only two small ribbon cables of wiring comes from the keyboard matrix. There are at least two limitations with this system.