Demoja / Demonstrations

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.

VBAP - Vector Base Amplitude Panning

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

Guitar Synthesis Demos from the DAFx-00 Conference

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

On-line testing of Java and Audio support on Web browsers

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

High-quality real-time model-based sound synthesis of the banjo

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


VRML models of the TKK Acoustics Lab's Echo and Anechoic Chambers

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

Miscellaneous demonstrations


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Modified: 18.08.2004
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