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Kurt Werner

Kurt Werner photo

Kurt Werner

Graduation Year: 
2017
Dissertation Title: 
Virtual Analog Modeling of Audio Circuitry Using Wave Digital Filters

About

I'm Dr. Kurt James Werner, a Lecturer in Audio @ the Sonic Arts Research Centre (SARC) @ Queen's University Belfast. I'm active as a researcher and writer, composer of electro-acoustic/acousmatic (&c.) music, author of digital signal processing code & compositional algorithms, & circuit-bender. My research focuses on theoretical aspects of wave digital filters and other virtual analog topics, computer modeling of circuit-bent instruments, & the history of music technology.

I earned my Ph.D. in Computer-Based Music Theory and Acoustics from Stanford University's Center for Computer Research in Music and Acoustics (CCRMA). As part of my doctorate I wrote a dissertation called “Virtual Analog Modeling of Audio Circuitry Using Wave Digital Filters” & a number of other papers & articles. Please find a list of my research published while at Stanford (pre-2017) below.

For current information, please visit my website http://ccrma.stanford.edu/~kwerner/ or feel free to contact me via e-mail at k.werner@qub.ac.uk or kwerner@ccrma.stanford.edu.

Dissertation

  • Kurt James Werner, “Virtual Analog Modeling of Audio Circuitry Using Wave Digital Filters,” December 2016.

Articles

  • Kurt James Werner, Jonathan S. Abel, “Modal Processor Effects Inspired by Hammond Tonewheel Organs,” Applied Sciences special issue “Audio Signal Processing,” 2016, 6(7), 185.
  • Alberto Bernardini, Kurt James Werner, Augusto Sarti, and Julius O. Smith, “Modeling Nonlinear Wave Digital Elements using the Lambert Function,” IEEE Transactions on Circuits and Systems I: Regular Papers, August 2016, 63(8), 1231–1242.
  • Kurt James Werner, François Germain, “Sinusoidal Parameter Estimation Using Quadratic Interpolation Around Power-Scaled Magnitude Spectrum Peaks,” Applied Sciences special issue “Audio Signal Processing” 2016, 6(10), 306.

Book Chapter

  • Jonathan S. Abel and Kurt James Werner, “Recreating the Acoustics of Hagia Sophia for Performance and Recording of Byzantine Chant,” in Aural Architecture: Music, Acoustics, and Ritual in Byzantium, ed. Bissera Pentcheva (forthcoming).

Conference Papers:

  • Kurt James Werner, W. Ross Dunkel, François Germain, “A Computational Model of the Hammond Organ Vibrato/Chorus Circuit using Wave Digital Filters,” Proceedings of the 19th International Conference on Digital Audio Effects (DAFx-16), Brno, Czech Republic, 5–9 September 2016.
  • Michael J. Olsen, Kurt James Werner, Julius O. Smith III, “Resolving Grouped Nonlinearities in Wave Digital Filters using Iterative Techniques,” Proceedings of the 19th International Conference on Digital Audio Effects (DAFx-16), Brno, Czech Republic, 5–9 September 2016.
  • W. Ross Dunkel, M. Rest, Kurt James Werner, Michael J. Olsen, Julius O. Smith III, “The Fender Bassman 5F6-A Family of Preamplifier Circuits—A Wave Digital Filter Case Study,” Proceedings of the 19th International Conference on Digital Audio Effects (DAFx-16), Brno, Czech Republic, 5–9 September 2016.
  • Maximilian Rest, W. Ross Dunkel, Kurt James Werner, Julius O. Smith III, “RTWDF—A Modular Wave Digital Filter Library With Support for Arbitrary Topologies and Multiple Nonlinearities,” Proceedings of the 19th International Conference on Digital Audio Effects (DAFx-16), Brno, Czech Republic, 5–9 September 2016.
  • Kurt James Werner, W. Ross Dunkel, Maximilian Rest, Michael J. Olsen, Julius O. Smith III, “Wave Digital Filter Modeling of Circuits with Operational Amplifiers,” Proceedings of the European Signal Processing Conference (EUSIPCO), Budapest, Hungary, 29 August – 2 September 2016.
  • Kurt James Werner, Julius O. Smith III, and Jonathan S. Abel, “Wave Digital Filter Adaptors for Arbitrary Topologies and Multiport Linear Elements,” Proceedings of the 18th International Conference on Digital Audio Effects (DAFx-15), Trondheim, Norway, 30 November – 3 December 2015.
  • Kurt James Werner, Vaibhav Nangia, Julius O. Smith III, and Jonathan S. Abel, “Resolving Wave Digital Filters with Multiple/Multiport Nonlinearities,” Proceedings of the 18th International Conference on Digital Audio Effects (DAFx-15), Trondheim, Norway, 30 November – 3 December 2015.
  • François Germain and Kurt James Werner, “Design Principles for Lumped Model Discretisation Using Möbius Transforms,” Proceedings of the 18th International Conference on Digital Audio Effects (DAFx-15), Trondheim, Norway, 30 November – 3 December 2015.
  • Jonathan S. Abel and Kurt James Werner, “Distortion and Pitch Processing Using a Modal Reverberator Architecture,” Proceedings of the 18th International Conference on Digital Audio Effects (DAFx-15), Trondheim, Norway, 30 November – 3 December 2015.
  • Chet Cnegy and Kurt James Werner, “Digitizing the Ibanez Weeping Demon Wah Pedal,” Proceedings of the 18th International Conference on Digital Audio Effects (DAFx-15), Trondheim, Norway, 30 November – 3 December 2015.
  • Kurt James Werner, Vaibhav Nangia, Alberto Bernardini, Julius O. Smith III, and Augusto Sarti, “An Improved and Generalized Diode Clipper Model for Wave Digital Filters,” Proceedings of the 139th Convention of the Audio Engineering Society (AES), New York, NY, 29 October – 1 November 2015.
  • Kurt James Werner, Vaibhav Nangia, Julius O. Smith III, and Jonathan S. Abel, “A General and Explicit Formulation for Wave Digital Filters with Multiple/Multiport Nonlinearities and Complicated Topologies,” Proceedings of the IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA), New Paltz, NY, 18–21 October 2015. (awarded BEST STUDENT PAPER)
  • Kurt James Werner, “the XQIFFT: Increasing the Accuracy of Quadratic Interpolation of Spectral Peaks via Exponential Magnitude Spectrum Weighting,” Proceedings of the 41st International Computer Music Conference (ICMC), Denton, TX, 25 September – 1 October 2015.
  • Alberto Bernardini, Kurt James Werner, Augusto Sarti, and Julius O. Smith III, “Modeling a Class of Multi-Port NonLinearities in Wave Digital Structures,” Proceedings of the European Signal Processing Conference (EUSIPCO), Nice, France, 31 August – 4 September 2015.
  • Kurt James Werner and Julius O. Smith III, “An Energetic Interpretation of Nonlinear Wave Digital Filter Lookup Table Error,” Proceedings of the IEEE International Symposium on Signals, Circuits and Systems (ISSCS), Iași, Romania, 9–10 July 2015. (invited paper)
  • Alberto Bernardini, Kurt James Werner, Augusto Sarti, and Julius O. Smith III, “Multi-port NonLinearities in Wave Digital Structures,” Proceedings of the IEEE International Symposium on Signals, Circuits and Systems (ISSCS), Iași, Romania, 9–10 July 2015.
  • Kurt James Werner, “Hybrid-Wave Wave Digital Filters and a Family of Wave Converters,” 2015 (unpublished).
  • Kurt James Werner, Jonathan S. Abel, and Julius O. Smith III, “More Cowbell: a Physically-Informed, Circuit-Bendable, Digital Model of the TR-808 Cowbell,” Proceedings of the 137th International Audio Engineering Society Convention, Los Angeles, CA, 9–12 October 2014.
  • Kurt James Werner, Jonathan S. Abel, and Julius O. Smith III, “The TR-808 Cymbal: a Physically-Informed, Circuit-Bendable, Digital Model,” Proceedings of the 40th International Computer Music Conference (ICMC) / 11th Sound and Music Computing (SMC) Conference, Athens, Greece, 14–20 September 2014.
  • Kurt James Werner, Jonathan S. Abel, and Julius O. Smith III, “A Physically-Informed, Circuit-Bendable, Digital Model of the Roland TR-808 Bass Drum Circuit,” Proceedings of the International Conference on Digital Audio Effects (DAFx-14), Erlangen, Germany, 1–5 September 2014.
  • Kurt James Werner and Mayank Sanganeria, “Bit Bending: an Introduction,” Proceedings of the International Conference on Digital Audio Effects (DAFx-13), Maynooth, Ireland, 2–5 September 2013.
  • Mayank Sanganeria and Kurt James Werner, “Grain Proc: a Real-Time Granular Synthesis Interface for Live Performance,” Proceedings of the International Conference on New Interfaces for Musical Expression (NIME), Daejeon, Korea, 27–30 May 2013.

Selected Recent Talks, &c.:

  • Julius O. Smith III and Kurt James Werner, “ Recent Progress in Wave Digital Audio Effects,” 18th International Conference on Digital Audio Effects (DAFx-15), Trondheim, Norway, 30 November – 3 December 2015. (invited keynote talk)
  • Julius O. Smith III and Kurt James Werner, “ Recent Developments in Signal Processing for Audio and Music,” EURASIP International Workshop on Recent Trends in Signal Processing, Cluj-Napoca, Romania, 6–7 July 2015. (invited plenary talk)
  • Kurt James Werner and Vaibhav Nangia, “ Wave-Digital Modeling of Hacked Tube Screamer Circuits: Generalizing and Improving the Diode Model,” CCRMA Research Colloquium, Stanford, CA, 25 February 2015.
  • Kurt James Werner, Jonathan S. Abel, and Julius O. Smith III, “Three Models of Circuit-Bent TR-808 Voices: the Bass Drum, Cymbal, and Cowbell,” Triple CCRMAlite Science Showcase, Stanford, CA, 26–27 October 2014.
  • Jonathan S. Abel, Sean A. Coffin, and Kyle S. Spratt, “A Modal Architecture for Artificial Reverberation with Application to Room Acoustics Modeling,” Proceedings of the 137th Convention of the Audio Engineering Society (AES), Los Angeles, CA, 9–12 October 2014.
  • Kurt James Werner, “The TR-808 Drum Machine and its Emulations,” Bone Flute to Autotune: A Conference on Music & Technology in History, Theory and Practice, University of California, Berkeley, CA, 24–26 April 2014.
  • Kurt James Werner, “Computer Models of Circuit Bending,” Circuit Benders' Ball, Nashville, TN, 11–13 April 2014. (invited talk)
  • Kurt James Werner, “Banging like an 808?: Developing a Physically-Informed, Circuit-Bendable, Digital Model of the Roland TR-808 Rhythm Composer,” CCRMA DSP Seminar, Stanford, CA, 3 March 2014.
  • Kurt James Werner, “Towards a Bendable Circuit Model of the Casio SK-1 Keyboard,” 166th Meeting of the Acoustical Society of America, San Francisco, CA, 2–6 December 2013.
  • Kurt James Werner and Mayank Sanganeria, “Bit Bending—Circuit Bending Brought to Software,” CCRMA Colloquium, Stanford, CA, 16 January 2013.