Modelling Nonlinearities on Musical Instruments by Means of Volterra Series
Lamberto Tronchin, Vanna Lisa Coli, Francesco F. Gionfalo · Archivio istituzionale della ricerca (Alma Mater Studiorum Università di Bologna) · 2017
The behaviour of the soundboard of electroacoustic tools and musical instruments is being investigated from several years. The modelling of such instruments is fundamental in order to determine their acoustic characterization. The determination of nonlinear features of the sound production and propagation allows the definition of acoustical aspects that can't be reproduced with methods based on linear impulse response. A method that allows approximating nonlinear distortions of musical instruments by exploiting the Volterra series model is presented. A Matlab code has been developed in order to test the method on real world audio signals. Results of applications are presented on a series of different wind instruments. Some sound examples are provided.