Physical Modeling of Plucked-Strings

• Main Authors: Shiu, Yu, 許昱
• Other Authors: Jeng, Shyh-Kang
• Format: Others
• Language: zh-TW
• Published: 1998
• Online Access: http://ndltd.ncl.edu.tw/handle/55096278691380381473

碩士 === 國立臺灣大學 === 電機工程學系研究所 === 86 === The subject of this thesis lies in examining the physical modeling of plucked strings, which is one of the promising methods of sound synthesis. Based on modeling the mechanism of production of sound, physical modeling provides not only a way of realizing the vibration and acoustic phenomena of musical instruments, but the digital sound of the best auditory quality. This thesis focuses on two methods of physical modeling: Karplus-Strong plucked-string algorithms and the digital waveguide.Karplus-Strong plucked- string algorithms can be regarded as the cascade combination of a delayline and a lowpass filter. The initial values are random numbers and can start a note with a lot of high harmonics.Based on the concept of travelling wave, digital waveguide avoid the huge computation burden when dealing with the wave equation by numerical integration. As long as provided proper initial and boundary conditions, this technique is able to simulate the sound of plucked strings in no time.