Choral generator
AssigneeARP Instruments, Inc.
InventorMichael A. Suchoff
Life of this patent
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Abstract
A choral generator is formed from a plurality of delay channels, each including a modulated delay line which non-linearly varies the time delay imparted to a signal passing through it. The outputs of the delay channels are combined with the undelayed audio signal to form a composite output characterized by enhanced musical presence.
Claims10
In a choral generator having a plurality of delay lines forming a corresponding plurality of delay channels for delaying a signal applied in common thereto, the improvement comprising a separate independed delay modulator for each said delay line, each modulator comprising
- A. a clock connected to drive a corresponding one of said delay lines at a rate determined by a control input applied thereto,
- B. an oscillator providing a time-varying output signal, and
- C. driving means connected to receive said oscillator output signal and providing to the control input of said clock a driving signal that is a non-linear function of said output signal.
Sound reproduction apparatus including a plurality of delay lines forming a corresponding plurality of delay channels for independently delaying a common audio signal applied thereto, each delay channel including
- A. an oscillator providing a time-varying output for controlling the time delay of said audio signals, said oscillator including
- (1) means for varying the frequency of said output to thereby vary the rate at which said time delay is varied, and
- (2) means for varying the amplitude of said output to thereby vary the extent to which time delay is varied,
- B. an exponential signal generator connected to receive the output of said oscillator and providing a driving signal that is an exponential function of said oscillator output signal, and
- C. an analog delay line having a control input connected to receive driving signals from said exponential generator and varying the time-delay of audio input signals applied to said delay line by an amount proportional to said driving signal.
Dependencies are inferred from the claim text.