- The parameters of a modal synthesis model (modal amplitudes, center frequencies, and decay rates) can be determine from frequency-domain representations.
- A marimba sound that demonstrates just a few strong resonances is shown in the figure below.
- The pole radius
*r*can be approximated from the bandwidth of the resonance as , where*B*is the 3dB bandwidth in Hz and*T*is the sample period. - Once modal parameters have been identified, it is possible to ``subtract'' them from the original source signal (using frequency-domain deconvolution) to get a residue or residual signal. This residue can then be used as the excitation source to the resonant filters to reconstruct the original sound.

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