tailieunhanh - Báo cáo hóa học: " Parameter Estimation of a Plucked String Synthesis Model Using a Genetic Algorithm with Perceptual Fitness Calculation"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Parameter Estimation of a Plucked String Synthesis Model Using a Genetic Algorithm with Perceptual Fitness Calculation | EURASIP Journal on Applied Signal Processing 2003 8 791-805 2003 Hindawi Publishing Corporation Parameter Estimation of a Plucked String Synthesis Model Using a Genetic Algorithm with Perceptual Fitness Calculation Janne Riionheimo Laboratory of Acoustics and Audio Signal Processing Helsinki University of Technology P O. Box 3000 FIN-02015 HUT Espoo Finland Email Vesa Valimaki Laboratory of Acoustics and Audio Signal Processing Helsinki University of Technology P O. Box 3000 FIN-02015 HUT Espoo Finland Pori School of Technology and Economics Tampere University of Technology P O. Box 300 FIN-28101 Pori Finland Email Received 30 June 2002 and in revised form 2 December 2002 We describe a technique for estimating control parameters for a plucked string synthesis model using a genetic algorithm. The model has been intensively used for sound synthesis of various string instruments but the fine tuning of the parameters has been carried out with a semiautomatic method that requires some hand adjustment with human listening. An automated method for extracting the parameters from recorded tones is described in this paper. The calculation of the fitness function utilizes knowledge of the properties of human hearing. Keywords and phrases sound synthesis physical modeling synthesis plucked string synthesis parameter estimation genetic algorithm. 1. INTRODUCTION Model-based sound synthesis is a powerful tool for creating natural sounding tones by simulating the sound production mechanisms and physical behavior of real musical instruments. These mechanisms are often too complex to simulate in every detail so simplified models are used for synthesis. The aim is to generate a perceptually indistinguishable model for real instruments. One workable method for physical modelling synthesis is based on digital waveguide theory proposed by Smith 1 . In the case of the plucked string instruments the method can be extended to model also the .