L. Savioja et V. Valimaki, Multiwarping for enhancing the frequency accuracy of digital waveguide mesh simulations, IEEE SIG PL, 8(5), 2001, pp. 134-136
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.