tailieunhanh - Báo cáo sinh học: " Research Article Distortion Analysis Toolkit—A Software Tool for Easy Analysis of Nonlinear Audio Systems Jyri Pakarinen"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài:Research Article Distortion Analysis Toolkit—A Software Tool for Easy Analysis of Nonlinear Audio Systems Jyri Pakarinen | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2010 Article ID 617325 13 pages doi 2010 617325 Research Article Distortion Analysis Toolkit A Software Tool for Easy Analysis of Nonlinear Audio Systems Jyri Pakarinen Department of Signal Processing and Acoustics School of Science and Technology Aalto University . Box 13000 00076Aalto Finland Correspondence should be addressed to Jyri Pakarinen Received 27 February 2010 Revised 30 April 2010 Accepted 17 May 2010 Academic Editor Udo Zoelzer Copyright 2010 Jyri Pakarinen. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Several audio effects devices deliberately add nonlinear distortion to the processed signal in order to create a desired sound. When creating virtual analog models of nonlinearly distorting devices it would be very useful to carefully analyze the type of distortion so that the model could be made as realistic as possible. While traditional system analysis tools such as the frequency response give detailed information on the operation of linear and time-invariant systems they are less useful for analyzing nonlinear devices. Furthermore although there do exist separate algorithms for nonlinear distortion analysis there is currently no unified easy-to-use tool for rapid analysis of distorting audio systems. This paper offers a remedy by introducing a new software tool for easy analysis of distorting effects. A comparison between a well-known guitar tube amplifier and two commercial software simulations is presented as a case study. This freely available software is written in Matlab language but the analysis tool can also run as a standalone program so the user does not need to have Matlab installed in order to perform the analysis. 1. Introduction Since the 1990s there has .