A modified FM synthesis approach to bandlimited signal generation


Lazzarini, Victor and Timoney, Joseph and Lysaght, Thomas (2008) A modified FM synthesis approach to bandlimited signal generation. In: DAFX-08 the 11th Int. Conference on Digital Audio Effects, September 1-4 2008, Espoo, Helsinki, Finland.

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Abstract

Techniques for the generation of bandlimited signals for application to digital implementations of subtractive synthesis have been researched by a number of authors. This paper hopes to contribute to the variety of approaches by proposing a technique based on Frequency Modulation (FM) synthesis. This paper presents and explains the equations required for bandlimited pulse generation using modified FM synthesis. It then investigates the relationships between the modulation index and the quality of the reproduction in terms of authenticity and aliasing for a sawtooth wave. To determine the performance of this technique in comparison to others two sets of simulation results are offered: the first computes the relative power of the non-harmonic components, and the second uses the Perceptual Evaluation of Audio Quality (PEAQ) algorithm. It is shown that this technique compares well with the alternatives. The paper concludes with suggestions for the direction of future improvements to the method.

Item Type: Conference or Workshop Item (Paper)
Keywords: Modified FM synthesis; virtual analog; digital sound synthesis;
Academic Unit: Faculty of Arts,Celtic Studies and Philosophy > Music
Faculty of Science and Engineering > Computer Science
Item ID: 4137
Depositing User: Joseph Timoney
Date Deposited: 31 Jan 2013 09:38
Refereed: Yes
URI:

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