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Dr Franz Zotter
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research assistant
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interests & current work
Recently, my colleagues and me were organizers of the Ambisonics Symposium 2009 and DAFx-10 in Graz. I had the opportunity to create a new lecture on acoustic holography and holophony, I may co-supervise several master students, I like discussing with colleagues working on their PhD, and I try to persue several research ideas at the same time :)
My current interests are:
- acoustic holography and holophony lecture(requires kunstuni-login)
- acoustic centering and spherical signal processing
- higher-order ambisonics and spherical acoustic signal representations
- auditory aspects of spatial audio perception
- frequency warping and spectral analysis
- vibration and radiation in the spherical sound field
- radiation capture and analysis (directivity pattern analysis)
- radiation synthesis with a spherical icosahedral loudspeaker array (directivity pattern synthesis)
publications
- Daniel Deboy, Franz Zotter,
"Tangential Intensity Algorithm for Acoustic Centering" , Fortschritte der Akustik, DAGA, Düsseldorf, [pdf], 2011. - Franz Zotter, Alexander Mattioli Pasqual,
"Radiation modes of t-design and extremal-points compact spherical loudspeaker arrays" , Fortschritte der Akustik, DAGA, Düsseldorf, [pdf], 2011. - Michael Kerscher, Franz Zotter,
"Kompakte 16-Kanal-Kugellautsprecheranordnung" , Fortschritte der Akustik, DAGA, Düsseldorf, [pdf], 2011. - Markus Noisternig, Franz Zotter,
"On the decomposition of acoustic source radiation patterns measured with surrounding spherical microphone arrays" , Fortschritte der Akustik, DAGA, Düsseldorf, [pdf], 2011. - Markus Noisternig, Franz Zotter, Rémi Desmonet, Winfried Ritsch,
"Preserving sound source radiation-characteristics in network-based musical performances" , Fortschritte der Akustik, DAGA, Düsseldorf, [pdf], 2011. - Markus Noisternig, Franz Zotter, Briak F.G. Katz,
"Reconstructing sound source directivity in virtual acoustic environments" , in "Principles and Applications of Spatial Hearing", eds: Yoiti Suzuki, Douglas Brungart, Hiroaki Kato, World Scientific Publishing Co Pte Ltd, 2011. - Franz Zotter,
"Techniques and Considerations on Sound Field Recording and Reproduction Using Spherical Harmonics" , invited guest talk, Fraunhofer IIS, Erlangen, [pdf], Nov 2010. - Franz Zotter, Matthias Frank, Alois Sontacchi,
"Virtual t-design Ambisonics-rig using VBAP" , EAA Euroregio, Ljubljana, [pdf], 2010. - Franz Zotter, Hannes Pomberger,
"Spherical Arrays for Sound-Radiation Analysis and Synthesis" , tutorial at DAFx-10, Graz, [slides pdf], 2010. - Franz Zotter, Hannes Pomberger, and Markus Noisternig,
"Ambisonic Decoding with and without Mode-Matching: A Case-Study Using the Hemisphere" , 2nd Ambisonics Symposium, Paris, [to pdf], 2010. - Christian Nachbar, Gerold Nistelberger, Franz Zotter,
"Listening to the Direct Sound of Musical Instruments in Freely Adjustable Surrounding Directions" , 2nd Ambisonics Symposium, Paris, [to pdf], 2010. - Daniel Deboy, Franz Zotter,
"Acoustic Center and Orientation Analysis of Sound-Radiation Recorded with a Surrounding Spherical Microphone Array" , 2nd Ambisonics Symposium, Paris, [to pdf], 2010. - Peter Plessas, Franz Zotter,
"Microphone arrays around rigid spheres for spatial recording and holography" , Fortschritte der Akustik, DAGA, Berlin, [pdf], 2010. - Daniel Deboy, Franz Zotter,
"Comparison of acoustic centering maps for radiation capture of musical instruments with spherical microphone arrays" , Fortschritte der Akustik, DAGA, Berlin, [pdf] 2010. - Fabian Hohl, Franz Zotter,
"Similarity of musical instrument radiation- patterns in pitch and partial" , Fortschritte der Akustik, DAGA, Berlin, [pdf], 2010. - Franz Zotter,
"Analysis and Synthesis of Sound-Radiation with Spherical Arrays" , Doctoral Thesis, Institute of Electronic Music and Acoustics, University of Music and Performing Arts Graz, [pdf], 2009. - Gerriet K. Sharma, Franz Zotter,
"Klanginstallation Ikosaederlautsprecher" , Poster and Sound Sculpture at European Forum Alpbach, University Forum, read more, 2009. - Hannes Pomberger, Franz Zotter,
"An Ambisonics Format for Flexible Playback Layouts" , 1st Ambisonics Symposium, 25-27 Juli, Graz, [pdf], [zip/ppt], 2009. - Michael Chapman et al.
"A Standard for Interchange of Ambisonic Signal Sets" , 1st Ambisonics Symposium, 25-27 Juli, Graz, [pdf], 2009. - Franz Zotter,
"Mehrkanalaustauschformat für 3D Audio Ambisonics" , 5. Thüringer Medienseminar, 19-20 Mai, Erfurt, [zip/ppt], 2009. - Franz Zotter, Hannes Pomberger, Matthias Frank,
"An Alternative Ambisonics Formulation: Modal Source Strength Matching and the Effect of Spatial Aliasing" , 126th AES, 7-10 May, Munich, [ppt], [to pdf] 2009. - Franz Zotter,
"Sampling Strategies for Acoustic Holography/Holophony on the Sphere" , NAG-DAGA, 23-26 March, Rotterdam, [to pdf], [ppt], 2009. - entire list of publications
teaching
Acoustic Holography and Holophony (Lecture):W1011
Algorithms in Acoustics and Computer Music 2 (Lab/Seminar):
S08, W0809, W0910, W1011
Acoustic Measurement Techniques 2 (Lab):
S08, S09, S10
advised students' works
Diploma theses:- Wolfgang Nemitz.
"Simulation and design of a measurement tube for microphones", [to pdf], 2010. - Daniel Deboy.
"Acoustic Centering and Rotational Tracking in Surrounding Spherical Microphone Arrays", [to pdf], 2010. - Michael Kerscher.
"Compact Spherical Loudspeaker Array for Variable Sound-Radiation", [to pdf], 2010. - Peter Plessas.
"Rigid sphere microphone arrays for spatial recording and holography", [to pdf], 2009. - Fabian Hohl.
"Kugelmikrofonarray zur Abstrahlungsvermessung von Musikinstrumenten", [to pdf], 2009. - Matthias Frank.
"Perzeptiver Vergleich von Schallfeldreproduktionsverfahren unterschiedlicher räumlicher Bandbreite", [to pdf], 2009. - Hannes Pomberger.
"Angular and Radial Directivity Control for Spherical Loudspeaker Arrays", [to pdf], 2008. - Daniel Hofer.
"Implementierung eines 64 Kanal Mikrofonarrays", [to pdf], 2008.
- Johannes Zaar.
"Vermessung von Außenorhübertragungsfunktionen mit reziproker Messmethode", [to pdf], 2010. - Stefan Richardt.
"Implementierung eines Modells zur Messung und Darstellung binauraler Lokalisation (Implementation of a model for measuring and illustrating binaural sound localization)", [to pdf], 2010. - Christian Siller.
"Beamforming mit einem Miniatur-Line-Arrays", [to pdf], 2010. - Sebastian Rieck.
"Implementierung einer Ausfallsverschleierung mittels spektraler Signalmodellierung", [to pdf], 2009. - Georg Koller.
"Verbesserung der virtuellen Akustik für Kopfhörer durch Berücksichtigung von Schulterdrehungen relativ zum Kopf", [to pdf], 2008. - Matthias Frank.
"Hörversuch zur Lokalisation bei verschiedenen Ambisonics-Decodern", [to pdf], 2008. - Margherita Jammer.
"Modeling sounds of Gamelan Instruments with Exponentially Decaying Sinusoids", [to pdf], 2008. - Fabian Hohl.
"Sound and Radiation Analysis of Multichannel Gamelan Sound Samples", [to pdf], 2008. - Peter Reiner, Christian Jochum.
"Measurement and Evaluation of Crosstalk within an Icosehedral Loudspeaker Array", [to pdf], 2007. - Christian Jochum, Peter Reiner.
"Driving Filters for the Icosahedral Louspeaker Array", [to pdf], 2007.
- Robert Baumgartner, Elmar Messner.
"Auswirkung der Abstrahlcharakteristik auf die Klangfarbe von Querflöten und Saxofonen", [to pdf], 2010.
programming
I'm occasionally contributing to the "iem" external libraries in the CVS repository of pure-data. I wrote the "pdoctave" (2005) external to connect pd with octave/MATLAB over pipe and shm under linux, and added a few objects to the "iemmatrix".