Title: | Aliasing Reduction in Nonlinear Audio Signal Processing |
Author(s): | Esqueda Flores, Fabián Francisco |
Date: | 2018 |
Language: | en |
Pages: | 64 + app. 88 |
Department: | Signaalinkäsittelyn ja akustiikan laitos Department of Signal Processing and Acoustics |
ISBN: | 978-952-60-7952-3 (electronic) 978-952-60-7951-6 (printed) |
Series: | Aalto University publication series DOCTORAL DISSERTATIONS, 74/2018 |
ISSN: | 1799-4942 (electronic) 1799-4934 (printed) 1799-4934 (ISSN-L) |
Supervising professor(s): | Välimäki, Vesa, Prof., Aalto Univeristy, Department of Signal Processing and Acoustics, Finland |
Thesis advisor(s): | Bilbao, Stefan, Dr., University of Edinburgh, UK |
Subject: | Acoustics, Electrical engineering |
Keywords: | acoustic signal processing, digital signal processing, antialiasing, nonlinear systems, circuit simulation, real-time systems |
Archive | yes |
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Abstract:Most real-world audio devices, particularly those of interest in musical applications, fall under the category of nonlinear systems. Examples of these devices include overdrive and distortion circuits used by guitar and bass players, dynamic range processors, and vintage synthesizer circuits. Nonlinear algorithms are known to expand the bandwidth of the input signal by introducing harmonic and intermodulation distortion. Naive digital emulations of these systems are susceptible to aliasing due to the inherent frequency constraints of discrete systems.
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Parts:[Publication 1]: Fabián Esqueda, Stefan Bilbao and Vesa Välimäki. Aliasing reduction in clipped signals. IEEE Transactions on Signal Processing, Vol. 64, No. 20, pp. 5255–5267, October 2016. DOI: 10.1109/TSP.2016.2585091 View at Publisher [Publication 2]: Fabián Esqueda, Vesa Välimäki, Stefan Bilbao. Rounding corners with BLAMP. In Proceedings of the 19th International Conference on Digital Audio Effects (DAFx-16), Brno, Czech Republic, pp. 121–128, September 2016.[Publication 3]: Fabián Esqueda, Henri Pöntynen, Vesa Välimäki, Julian D. Parker. Virtual analog Buchla 259 wavefolder. In Proceedings of the 20th International Conference on Digital Audio Effects (DAFx-17), Edinburgh, UK, pp. 192–199, September 2017.[Publication 4]: Fabián Esqueda, Vesa Välimäki, Stefan Bilbao. Antialiased soft clipping using an integrated bandlimited ramp. In Proceedings of the 24th European Signal Processing Conference (EUSIPCO), Budapest, Hungary, pp. 1043–1047, August–September 2016. DOI: 10.1109/EUSIPCO.2016.7760407 View at Publisher [Publication 5]: Stefan Bilbao, Fabián Esqueda, Julian D. Parker, Vesa Välimäki. Antiderivative antialiasing for memoryless nonlinearities. IEEE Signal Processing Letters, Vol. 24, No. 7, pp. 1049–1053, July 2017. DOI: 10.1109/LSP.2017.2675541 View at Publisher [Publication 6]: Fabián Esqueda, Henri Pöntynen, Julian D. Parker, Stefan Bilbao. Virtual analog models of the Lockhart and Serge wavefolders. Applied Sciences, Vol. 7, No. 12, December 2017. DOI: 10.3390/app7121328 View at Publisher [Publication 7]: Fabián Esqueda, Vesa Välimäki. Alias-free simulation of static audio distortion circuits using the Lambert-W function. Submitted to IEEE Transactions on Circuits and Systems II: Express Briefs, March 2018. |
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