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Variable Fractional Delay Filters in Bandlimited Oscillator Algorithms for Music Synthesis

Submitted by juhan on Wed, 05/12/2010 - 2:52pm
TitleVariable Fractional Delay Filters in Bandlimited Oscillator Algorithms for Music Synthesis
Publication TypeConference Proceedings
Year of Conference2010
AuthorsPekonen, J., V. Välimäki, J. Nam, J. S. Abel, and J. O. Smith III
Conference Namethe 2010 International Conference on Green Circuits and Systems (ICGCS2010)
Date Published06/2010
Conference LocationShanghai, China
KeywordsAntialiasing, fractional-delay filter, oscillators, virtual analog
AbstractTrivially sampled geometric waveforms such as the 
rectangular pulse wave used in subtractive sound synthesis suffer 
from aliasing caused by the discontinuities in the waveform or its 
derivative. Several algorithms for the reduction of aliasing dis- 
tortion have been suggested, providing either complete removal 
or great suppression of aliasing. Some antialiasing oscillators 
utilize variable fractional delay filters as an essential part of 
the algorithm. In this paper, these oscillators are reviewed with 
an emphasis on motivating the use of the fractional delay filters.
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