Adaptive Additive Synthesis of Sound.
Axel Röbel · 1999
In the following article we investigate a new algorithm for additive sound synthzesis that extends the standard approach by means of explictely modeling a sound as a superposition of non stationary partials with time varying amplitude and frequency. Due to the extended model an adaptive parameter estimation is required. By means of a mathematical investigation we show, that it is possible to track a partials amplitude, frequency and phase by only adapting a subset of the model parameters and that a stable partial tracking requires the use of overlapping analysis blocks. We demonstrate the algorithm by means of additve synthesis of a synthetic and a piano tone. 1 Introduction With the development of the phase vocoder techniques additive synthesis has been evolved into one of the most successful paradigms for resynthesis of natural sounds. Based on the short time Fourier transformation (STFT) the additive synthesis algorithms have the potential to resynthesize any kind of sound w...