Modal Synthesis | Innovation Fascinations
Modal synthesis continues to develop, with newer research directions focussing on the problem of interaction with nonlinear point excitation mechanisms.
The missing link: modal synthesis
However, elastic rods are an important computer animation primitive for which prior sound synthesis methods, such as modal synthesis, are ill-suited for several reasons: large displacements, nonlinear vibrations, dispersion effects, and the geometrically singular nature of rods.
In addition, a formulation taken from the component mode synthesis literature is introduced to allow components of the system to be represented in modal or finite segment form.
Review of modal synthesis techniques and a new ..
A high-resolution time-frequency analysis technique, the modal distribution, is applied to sung vowels from a soprano singer. Parameters are estimated for each partial component of notes analyzed with the modal distribution. These estimates are used in an additive synthesis model to generate replicates of the original recording, using a series of time-varying sinusoids. Additionally, a source-filter model is applied to create synthetic signals, where pitch- and vowel-specific filters and driving functions are constructed from the amplitude and frequency estimates obtained. Different driving functions, which sample the range of this singer's rate and excursion variation, are transposed and filtered to create synthetic signals. The perceptual salience of the different rates and excursions is then determined via a paired-comparison listening experiment. It is found that listeners are sensitive to small variations in both average vibrato rate and average vibrato excursion. However, the perceived amount of vibrato excursion varies somewhat depending upon the pitch at which the vibrato is "played" synthetically. Finally, the naturalness and sound quality of these synthetic examples is determined through both paired-comparison and single-note sound quality scaling listening experiments.
Example-Guided Physically Based Modal Sound Synthesis
Classical approach to complex dynamical systems modelling using modal synthesis method is based on the generalized coordinates transformation to the new configuration space by means of chosen master eigenmodes of vibration. The paper introduces generalization of the modal synthesis method with quasistatic consideration of slave eigenmodes of vibration. This improvement brings better approximation of the system behaviour while the number of degrees of freedom of the reduced model is the same as in the case of classical approach. The results of modal and acoustic analysis of the test-gearbox, made a gain on a classical and new reduced model, are compared.
MODAL SYNTHESIS OF WEAPON SOUNDS - …
Under weakly nonlinear conditions, it is possible to draw some mainly qualitative conclusions using perturbation analysis about modal solutions (though this has not, apparently, been done in the context of musical sound synthesis).