Patents Assigned to Electronic Music Studios (London) Limited
  • Patent number: 3974334
    Abstract: A complex waveform synthesizer comprises a plurality of digital oscillators producing unit waveforms at distinct frequencies and constituted by respective storage zones storing, as digital words, the momentary values of the waveforms. The required amplitudes of the waveforms are produced by a digital modulator supplied with trains of digital desired amplitude values from a digital interpolator receiving corresponding trains of desired digital values at a slower rate than those supplied by the interpolator. The modulator supplies the waveforms, with an amplitude definition greater than that of the desired values supplied to the interpolator, to a digital accumulator which combines the digital words it receives to produce a series of digital words defining a complex waveform which is the sum of the individual waveforms defined by the series of words emerging from the modulator.
    Type: Grant
    Filed: December 21, 1973
    Date of Patent: August 10, 1976
    Assignee: Electronic Music Studios (London) Limited
    Inventor: David Cockerell