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This page presents some audio examples and other demo material related to research projects
of the Laboratory of Acoustics and Audio Signal Processing at the Helsinki University of Technology
in the fields of Physical Modeling, Model-Based Sound Synthesis, Auralization etc.
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VBAP - Vector Base Amplitude Panning
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VBAP - Vector Base Amplitude Panning is a method for positioning virtual sources to multiple loudspeakers.
The number of loudspeakers can be varying and they can be placed in an arbitrary 2-D or 3-D
positioning. VBAP produces virtual sources that are as sharp as is possible with current
loudspeaker configuration and amplitude panning methods, since it uses at one time the
minimum number of loudspeakers needed, one, two, or three. The VBAP method has been developed
by Ville Pulkki.
VBAP implementations are available at least for
Csound and MAX /
MSP.
Online demonstration
- WWWVBAP - The Ultimate VBAP WWW Demonstration
Further reading
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Guitar Synthesis Demos from the DAFx-00 Conference
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The following demonstrations were played as part of the presentation at the DAFx-00 conference in Verona, Italy, in December 2000.
The paper related to these demonstrations was published in the Proceedings of the 2000 COST-G6 Conference on Digital Audio Effects
(DAFx-00), pp. 183-188, Verona, Italy, Dec. 7-9, 2000.
The following musical examples were produced by Dr.
Mikael Laurson at Sibelius Academy, Helsinki, Finland
(more sound examples from this presentation...).
Audio files
Further reading
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M. Laurson, C. Erkut, and V. Välimäki, "Methods for
modeling realistic playing in plucked-string synthesis: analysis, control and synthesis," in
Proc. COST-G6 Conf. Digital Audio Effects (DAFx'00), pp. 183-188, Verona,
Italy, Dec. 7-9, 2000.
- C. Erkut, V. Välimäki, M. Karjalainen and M. Laurson,
"Extraction
of Physical And Expressive Parameters for Model-based
Sound Synthesis of The Classical Guitar," presented at the 108th AES Int. Convention 2000,
preprint no. 5114, 52 p., Paris, France, Feb. 19-22, 2000.
- V. Välimäki, T. Tolonen, and M. Karjalainen, "
Plucked-string synthesis
algorithms with tension modulation nonlinearity," in Proc. IEEE Int. Conf. Acoustics, Speech, and Signal Processing (ICASSP'99),
vol. 2, pp. 977-980, Phoenix, Arizona, March 15-19, 1999.
- M. Karjalainen, V. Välimäki, and T. Tolonen, "Plucked-string models: from
the Karplus-Strong algorithm to digital waveguides and beyond," Computer
Music Journal, vol. 22, no. 3, 17-32, Fall 1998.
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On-line testing of Java and Audio support on Web browsers
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Eduardo García Barrachina developed an interactive web application for
testing the support of Java Applets and audio on web browsers. By using
this application, you can find out whether your browser can display
Java Applets and play audio samples through them.
Online demonstration
Further reading
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High-quality real-time model-based sound synthesis of the banjo
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This sound example is a short tune accompanied by bass and
drums (played on Roland Sound Canvas). The song was performed live with a MIDI keyboard by Zoltan Janosy.
Audio files
- banjo.wav (WAV, 16-bit, 22 kHz, 1.2 Mb)
- banjo.aiff (AIFF, 16-bit, 44.1 kHz, 2.45 Mb)
- banjo.amp (MPEG 1 Layer II, 16-bit, 44.1 kHz, 405 kb, 1:6 compression)
Further reading
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VRML models of the TKK Acoustics Lab's Echo and Anechoic Chambers
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As a result of the Acoustics laboratory project course (S-89.900) in 1997-1998, we are proud to present
VRML models of Echo and Anechoic Chambers. The models are created with original size information and textures
based on measurements and photographs!
The course was organized in order to familiarize new students to project working. The VRML team consisted
of first year undergraduate students, 3rd to nth year undergraduate students as team leaders and laboratory personnel.
VRML models
(note: the models are VRML 2.0 and they have been created with 1) Notepad and 2)
SGI CosmoWorlds software.
In order to view them with your browser, you will need the Cosmo player and plugin.
Further information
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Miscellaneous demonstrations
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