Modified phase vocoder scheme for dynamic frequency warping
2008 (English)In: 3rd International Symposium on Communications, Control and Signal Processing, 2008. ISCCSP 2008., Piscataway, NJ, USA: IEEE , 2008, 1291-1296 p.Conference paper (Refereed)
Frequency warping is a desirable building block for sound effects and synthesis. Physical model driven pitch shifting of inharmonic sounds and the transformation of harmonic into inharmonic sounds are the main features of frequency warping effects. However, frequency warping sound signals is a non-causal and computationally expensive operation. In recent work  we showed that multirate filter bank s derived from a modified phase vocoder structure are suitable for the real-time approximate computation of frequency warping. The approximation is proven to be very accurate from both numerical and perceptual points of view. In this paper we extend the principles of the original design to implement time-varying frequency warping methods. The proposed algorithm is suitable for inclusion in the synthesis of systems with dynamic stiffness and for the production of captivating audio effects.
Place, publisher, year, edition, pages
Piscataway, NJ, USA: IEEE , 2008. 1291-1296 p.
Digital Audio Effects, Frequency Warping, Short-Time Fourier Transform, Filter Banks
Engineering and Technology Signal Processing
IdentifiersURN: urn:nbn:se:liu:diva-43637DOI: 10.1109/ISCCSP.2008.4537425ISI: 000257934100245Local ID: 74462ISBN: 978-1-4244-1687-5 (print)ISBN: 978-1-4244-1688-2 (e-ISBN)OAI: oai:DiVA.org:liu-43637DiVA: diva2:264497
3rd International Symposium on Communications, Control and Signal Processing, St Julians, Malta, 12-14 March 2008