Digital signal processor for providing timbral change in arbitrary audio signals

Abstract

An audio signal processor in which the harmonic content of the output signal (Figure 3g) varies with the amplitude of the input signal (Figure 3a). The preferred embodiment includes an analog to digital converter (102), a sample and hold circuit (101), timing circuits (106), a RAM look-up table (103) for performing non-linear transformation, a digital to analog converter (104) and a post filter (105) from which processed analog audio is output.