![]() 5.1) as obtained, for instance, from a discrete Fourier transform. Such sinusoidal components are easily observed on a spectral analysis display (Fig. The nearly periodic part of the signal can be viewed as a sum of sinusoidal components, called partials, with time-varying frequency and amplitude. Many musical sound signals may be described as a combination of a nearly periodic waveform and colored noise. The additive-plus-residual analysis/synthesis method is based on a representation of signals in terms of a sum of time-varying sinusoids and of a non-sinusoidal residual signal. A spectral envelope is an amplitude-vs-frequency function, which may be obtained from the envelope of a short-time spectrum (Rodet et al., 1987 Schwarz, 1998). The subject of this chapter is the estimation, representation, modification, and use of spectral envelopes in the context of sinusoidal-additive-plus-residual analysis/synthesis. ![]()
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