Extracting Sinusoids From Harmonic Audio Signals

Rasmus Althoff; Florian Keiler; Udo Zölzer
DAFx-1999 - Trondheim
This paper presents a special window function for a Fast Fourier Transform (FFT) based spectral modeling approach for signals consisting of sinusoids plus noise. The main new idea is to choose a time window function with a simple Fourier transform. With the knowledge of the Fourier transform of the window function we are able to extract the parameters (frequency, amplitude, and phase) of sinusoids in real-time with a digital signal processor.