Multiwarping for enhancing the frequency accuracy of digital waveguide mesh simulations

A multiwarping technique is introduced. The method is based on cascading fr equency warping procedures and sample rate conversions. As a practical exam ple, we show that with this new approach, the maximal frequency error of di gital waveguide mesh simulations can be reduced by about 50%. This techniqu e gives more degrees of freedom to attain a desired amount of nonlinear fre quency shift still applying first-order allpass filters for processing fini te-length digital impulse responses.