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A piano roll is a music storage medium used to operate a player piano, piano player or reproducing piano. Piano rolls, like other music rolls, are continuous rolls of paper with holes punched into them. These perforations represent note control data. The roll moves over a reading system known as a tracker bar; the playing cycle for each musical ...
ROLI's first instrument, the ROLI Seaboard, [10] [11] is a synthesizer controller based on the piano keyboard. The instrument has a continuous surface of pliable silicone rather than the discrete keys of a piano. This lets a musician play "in between" the keys of a standard piano.
Piano roll: Logic Pro: macOS (also previously for Windows & Atari ST) Proprietary: Apple/Emagic (formerly named C-Lab) Piano roll, step editor, event list: LMMS: Linux, macOS, OpenBSD, Windows: GPL-2.0-or-later: Piano roll, step sequencer: DAW; VST, LADSPA support. MIDI editor displaying notes positions on a virtual keyboard.
Computer keyboards made of flexible silicone or polyurethane materials can roll up in a bundle. This type of keyboard can take advantage of the thin flexible plastic membranes, but still pose the risk of damage. When they are completely sealed in rubber, they are water resistant. Roll-up keyboards provide relatively little tactile feedback.
The spool fits into the player piano spool box whereupon the free end of the music sheet is hooked onto the take-up spool which will unwind the roll at an even pace across the reading mechanism (the "tracker bar") The music score to be played is programmed onto the paper by means of perforations. Different player systems have different ...
Key rollover is the ability of a computer keyboard to correctly handle several simultaneous keystrokes. A keyboard with n-key rollover (NKRO) can correctly detect input from each key on the keyboard at the same time, regardless of how many other keys are also being pressed. Keyboards that lack full rollover will register an incorrect keystroke ...
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