Kurzweil K250

In the mid-1970s, Raymond Kurzweil invented the first multi-font reading machine for the blind, consisting of the earliest CCD flat-bed scanner and text-to-speech synthesizer.

[1] In 1982, Stevie Wonder invited Raymond Kurzweil to his studio in Los Angeles, and asked if "we could use the extraordinarily flexible computer control methods on the beautiful sounds of acoustic instruments?

This method was called "contoured modelling" by Kurzweil in marketing material and regarded as a proprietary scheme.

It is a very complex, elaborate software, a set of programs that are used to compress the data of a series of sounds, so that we can get it into a reasonable amount of memory.

The CEM 3335's integrated voltage controlled amplifier[4] provided exponential gain to reconstruct the dynamics that were lost in the compression.

The Kurzweil K250 was the first electronic instrument to faithfully reproduce the sounds of an acoustic grand piano.