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date: 11 December 2019

Apple IIlocked

  • Hugh Davies
  • , revised by Anne Beetem Acker


Microcomputer designed by Steve Jobs (b San Francisco, 25 Feb 1955; d Palo Alto, 5 Oct 2011) with Steve Wozniak (b San Jose, CA, 11 Aug 1950) and manufactured in various versions from 1977 until 1993 by Apple Computer Inc. of Cupertino, California. It has been widely used in musical and other contexts. The Apple II consists of a single box for the logic circuitry (based on the MOS 6502 microprocessor) with an integral alphanumeric keyboard, and attached peripherals typically including a visual display unit, two disc drives, a printer, and joysticks. The original Apple II included a monophonic speaker and one-bit sound capability that could be made to sound like two or three simultaneous voices.

For higher-quality music production, by 1981 other firms began to produce various circuit boards (sound cards) to plug into the Apple II. Examples include ALF Products’ synthesizer card and Mountain Computer’s popular 16-oscillator digital synthesizer with software. Two commercially produced digital synthesizers with polyphonic keyboards, the alphaSyntauri (...

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