Simulation of Plucked Strings Exhibiting Tension Modulation Driving Force
نویسندگان
چکیده
Recently, a nonlinear discrete-time model that simulates a vibrating string exhibiting tension modulation has been presented. This paper elaborates the previous model by taking into account two phenomena: 1) coupling of the tension modulation force to the instrument body and 2) feedback of the tension modulation force to the vibrating string. The two phenomena are investigated by analysis of plucked string instrument tones. Sound synthesis examples are available at www.acoustics.hut.fi/ ̃ttolonen/icmc99/ including tones by the proposed model, and by a linear model and a previous nonlinear model. The examples show that tension modulation coupling phenomena are important for the quality of synthesized tones and that the tones by the presented model are more natural than with the previous models.
منابع مشابه
Physics-Based Methods for Modeling Nonlinear Vibrating Strings
Nonlinearity in the vibration of a string is responsible for interesting acoustical features in many plucked string instruments, resulting in a characteristic and easily recognizable tone. For this reason, synthesis models have to be capable of modeling this nonlinear behavior, when high quality results are desired. This study presents two novel physical modeling algorithms for simulating the t...
متن کاملModeling of tension modulation nonlinearity in plucked strings
In this paper, a nonlinear discrete-time model that simulates a vibrating string exhibiting tension modulation nonlinearity is developed. The tension modulation phenomenon is caused by string elongation during transversal vibration. Fundamental frequency variation and coupling of harmonic modes are among the perceptually most important effects of this nonlinearity. The proposed model extends th...
متن کاملNonlinear Modeling and Synthesis of the Kantele - a Traditional Finnish String Instrument
We apply a recently developed nonlinear string synthesis algorithm to modeling and synthesis of the kantele, which is a plucked string instrument used in traditional Finnish music for the past few thousand years. The new model combines formerly proposed linear plucked-string models with recent nonlinear extensions. As a result, a dual-polarization nonlinear model is obtained where the differenc...
متن کاملObject-based Sound Source Modeling
This thesis proposes techniques for object-based audio and music. The work can be divided into two parts corresponding to model-based synthesis of musical instruments and computational analysis of audio and music. The contributions of this work are in signal and auditory analysis, sound object modeling, and sound signal synthesis. The rst half of the thesis considers linear and particularly non...
متن کاملPlucked-string synthesis algorithms with tension modulation nonlinearity
Digital waveguide modeling of a nonlinear vibrating string is investigated when the nonlinearity is essentially caused by tension modulation. We derive synthesis models where the nonlinearity is implemented with a time-varying fractional delay filter. Also, conversion from a dual-delay-line physical model into a single-delay-loop model is explained. Realistic synthetic tones with nonlinear effe...
متن کامل