tailieunhanh - Báo cáo hóa học: " Sound Synthesis of the Harpsichord Using a Computationally Efficient Physical Model"

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: Sound Synthesis of the Harpsichord Using a Computationally Efficient Physical Model | EURASIP Journal on Applied Signal Processing 2004 7 934-948 2004 Hindawi Publishing Corporation Sound Synthesis of the Harpsichord Using a Computationally Efficient Physical Model Vesa Valimaki Laboratory of Acoustics and Audio Signal Processing Helsinki University of Technology . Box 3000 02015 Espoo Finland Email Henri Penttinen Laboratory of Acoustics and Audio Signal Processing Helsinki University of Technology . Box 3000 02015 Espoo Finland Email Jonte Knif Sibelius Academy Centre for Music and Technology . Box 86 00251 Helsinki Finland Email jknif@ Mikael Laurson Sibelius Academy Centre for Music and Technology . Box 86 00251 Helsinki Finland Email laurson@ Cumhur Erkut Laboratory of Acoustics and Audio Signal Processing Helsinki University of Technology . Box 3000 02015 Espoo Finland Em ail Received 24 June 2003 Revised 28 November 2003 A sound synthesis algorithm for the harpsichord has been developed by applying the principles of digital waveguide modeling. A modification to the loss filter of the string model is introduced that allows more flexible control of decay rates of partials than is possible with a one-pole digital filter which is a usual choice for the loss filter. A version of the commuted waveguide synthesis approach is used where each tone is generated with a parallel combination of the string model and a second-order resonator that are excited with a common excitation signal. The second-order resonator previously proposed for this purpose approximately simulates the beating effect appearing in many harpsichord tones. The characteristic key-release thump terminating harpsichord tones is reproduced by triggering a sample that has been extracted from a recording. A digital filter model for the soundboard has been designed based on recorded bridge impulse responses of the harpsichord. The output of the string models is injected in the soundboard filter .