10.2 Spectral Models.

The article focuses on the sinusoidal model for conversion of time-domain signal into its frequency representation. The most common approach is though short-time Fourier transform (STFT), but the sinusoidal model represents a step towards a more flexible representations while compromising both sound fidelity and computing time. It is based on modeling the time-varying spectral characteristics of a sound as sums of time-varying sinusoids. Still sinusoidal model added with residual model is best. The sinusoidal plus residual model can cover a wide "compromise space" and can in fact be seen as the generalization of both the STFT and the sinusoidal models.