Application of Wave Field Synthesis in electronic music and sound - - PowerPoint PPT Presentation

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Application of Wave Field Synthesis in electronic music and sound - - PowerPoint PPT Presentation

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Application of Wave Field Synthesis in electronic music and sound installations M.A.J. Baalman Electronic Studio Communication Sciences Technical University Berlin Berlin, Germany Application of wave field synthesis in electronic music and

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Application of wave field synthesis in electronic music and sound installations

Application of Wave Field Synthesis in electronic music and sound installations

M.A.J. Baalman Electronic Studio Communication Sciences Technical University Berlin Berlin, Germany

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Application of wave field synthesis in electronic music and sound installations

Overview

  • Introduction

* Spatialisation in electronic music * Theory of Wave Field Synthesis

  • System setup
  • Interface Software
  • Application in composition & sound installations
  • Outlook & discussion
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Application of wave field synthesis in electronic music and sound installations

Spatialisation in EM

  • Since early development of electronic music an

interest in spatial sound

  • Standards are quadraphonic or octaphonic

setups, with or without ambisonic techniques

  • A lot of examples of setups with a lot of

loudspeakers for one specific piece or as a way

  • f interpreting a work
  • Overview in Malham’s article in Computer Music

Journal, winter 1996

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Application of wave field synthesis in electronic music and sound installations

Spatialisation in EM

  • Since early development of electronic music an

interest in spatial sound

  • Standards are quadraphonic or octaphonic

setups, with or without ambisonic techniques

  • A lot of examples of setups with a lot of

loudspeakers for one specific piece or as a way

  • f interpreting a work
  • Overview in Malham’s article in Computer Music

Journal, winter 1996 Wave Field Synthesis could be an interesting technique in EM nal, winter 1996

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Application of wave field synthesis in electronic music and sound installations

Wave Field Synthesis

  • Principle of Huygens
  • Principle of Wave Field Synthesis
  • Possibilities with Wave Field Synthesis
  • Limitations
  • Practical applications
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Application of wave field synthesis in electronic music and sound installations

Principle of Huygens

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Application of wave field synthesis in electronic music and sound installations

Principle of Huygens

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Application of wave field synthesis in electronic music and sound installations

Principle of Wave Field Synthesis

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Application of wave field synthesis in electronic music and sound installations

Principle of Wave Field Synthesis

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Application of wave field synthesis in electronic music and sound installations

Possibilities

  • Synthesize sound sources on specific places,

even in front of the loudspeakers

  • Moving sound sources
  • Simulate acoustics of a room, by synthesizing

reflections

  • No sweet spot, but a large listening area!
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Application of wave field synthesis in electronic music and sound installations

Limitations

  • Frequency limitations

* Low frequencies limited by size of speakers

  • -> subwoofers!

* High frequencies limited through spatial aliasing: the

further apart the speakers, the lower the high frequency limit

  • Computation: for each speaker a signal needs to

be calculated

  • A lot of speakers are needed!
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Application of wave field synthesis in electronic music and sound installations

Limitations

  • Frequency limitations are inherent to the theory

and characteristics of loudspeakers

  • Computation seems to be a matter of time; cpu

power increases

  • Loudspeaker panels are becoming available, as

well as multi-exciter flat panel loudspeakers, partly with built-in computation units for wave field synthesis

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Application of wave field synthesis in electronic music and sound installations

Applications

  • Direct sound enhancement
  • Virtual reality
  • Cinema
  • Teleconferencing
  • Simulation
  • Research
  • Electronic music
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Application of wave field synthesis in electronic music and sound installations

System of the TU Berlin

  • 24 speakers (FOSTEX personal monitor 6301B)
  • PC with RME Hammerfall soundcard running Linux
  • Interface software:

* graphical interface * calculates the delays and attenuations * Controls the convolution engine (BruteFIR) that makes the

convolutions in real time and feeds the soundcard with the

  • utput sound

* Is controllable via OpenSoundControl

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Application of wave field synthesis in electronic music and sound installations

Interface software: WONDER

  • Created to provide an interface for composers

and sound artists of electronic music

  • Has to be usable without the user needing to

worry about the actual calculations

  • Has to be flexible with regard to the actual

setup of the system

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Application of wave field synthesis in electronic music and sound installations

Interfacesoftware: WONDER

3 parts:

  • Composition tool
  • Grid definition tool
  • Play engine
  • Control possible via OpenSoundControl
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Application of wave field synthesis in electronic music and sound installations

WONDER - composition

  • For each source:

* Type * Movement * Reflections, also variable rooms * Division in time sections * Possible to loop movements

  • Positions and paths can be entered graphically or typed
  • WONDER calculates points on the path and a score that

can be played.

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Application of wave field synthesis in electronic music and sound installations

WONDER - composition

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Application of wave field synthesis in electronic music and sound installations

WONDER - grid definition

  • Allows the user to set a grid of points that can be

used for live control of the system

  • Grid can consist of different ‘segments’, of

different shapes and spacing and characteristics (high frequency damping, room characteristics)

  • Input is graphical or typed
  • WONDER calculates the points and the

necessary filters

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Application of wave field synthesis in electronic music and sound installations

WONDER - grid definition

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Application of wave field synthesis in electronic music and sound installations

WONDER - grid definition

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Application of wave field synthesis in electronic music and sound installations

WONDER - play engine

  • The play engine consists of:

* Convolution engine BruteFIR, which is run as a

childe process

* Communication with BruteFIR via the “command line

interface” to control the movement of sources (switching between filters)

* Control over the movements by the user, either

graphically via WONDER or by sending OSC messages to WONDER

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Application of wave field synthesis in electronic music and sound installations

WONDER - play engine

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Application of wave field synthesis in electronic music and sound installations

WONDER - Open Sound Control

  • The OpenSoundControl server* of WONDER

allows external control over the program

* Over sources: “/WFS/source/” with messages for

position, type, etc.

* Over a score: “/WFS/score/” with messages for play,

record, pause, stop, save, time

* Over the engine: “/WFS/” with messages for init

(initialisation), start, stop

* OSC-server created by Daniel Plewe

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Application of wave field synthesis in electronic music and sound installations

Work with composers

  • Done in December 2002/January 2003 in

preparation for Club Transmediale Festival in February 2003 in Berlin

  • After a general introduction in December, one to

two days work with composer in studio for spatialisation

  • Sound material was prepared elsewhere by each

composer

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Application of wave field synthesis in electronic music and sound installations

Ping Pong Ballet, Marc Lingk

  • Sounds were created from ping pong ball sounds
  • so: movements based on ping pong ball game
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Application of wave field synthesis in electronic music and sound installations

Ping Pong Ballet, Marc Lingk

  • Sounds were created from ping pong ball sounds
  • so: movements based on ping pong ball game
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Application of wave field synthesis in electronic music and sound installations

Ping Pong Ballet, Marc Lingk

  • Sounds were created from ping pong ball sounds
  • so: movements based on ping pong ball game
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Application of wave field synthesis in electronic music and sound installations

Ping Pong Ballet, Marc Lingk

  • Sounds were created from ping pong ball sounds
  • so: movements based on ping pong ball game
  • all loop movements
  • composition moves from familiar ping pong game

to dense vivid sound scape

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Application of wave field synthesis in electronic music and sound installations

Restored to Life, Ilka Theurich

  • Use of various movements
  • Use of plane waves and point sources
  • Use of virtual rooms
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Application of wave field synthesis in electronic music and sound installations

Restored to Life, Ilka Theurich

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Application of wave field synthesis in electronic music and sound installations

Restored to Life, Ilka Theurich

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Application of wave field synthesis in electronic music and sound installations

Restored to Life, Ilka Theurich

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Application of wave field synthesis in electronic music and sound installations

Restored to Life, Ilka Theurich

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Application of wave field synthesis in electronic music and sound installations

Restored to Life, Ilka Theurich

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Application of wave field synthesis in electronic music and sound installations

Restored to Life, Ilka Theurich

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Application of wave field synthesis in electronic music and sound installations

Beurskrach, M. Baalman

  • Concept of an object of a fairly large size,

modeled as 4 points on the object

  • All points have the same source material, but

filtered differently

  • Cooperation with Julius Stahl, who made

visuals

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Application of wave field synthesis in electronic music and sound installations

Beurskrach, M. Baalman

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Application of wave field synthesis in electronic music and sound installations

Beurskrach, M. Baalman

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Application of wave field synthesis in electronic music and sound installations

Beurskrach, M. Baalman

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Application of wave field synthesis in electronic music and sound installations

Beurskrach, M. Baalman

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Application of wave field synthesis in electronic music and sound installations

Beurskrach, M. Baalman

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Application of wave field synthesis in electronic music and sound installations

Beurskrach, M. Baalman

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Application of wave field synthesis in electronic music and sound installations

Scratch

  • Responsive sound installation, created in

SuperCollider

  • Concept: a virtual sonic creature that

develops itself, depending on internal and external impulses

  • Movement of the sound is controlled with

OSC from SuperCollider

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Application of wave field synthesis in electronic music and sound installations

Future

  • Extending external control via OSC
  • More complex source definition

* size * frequency dependent directional characteristics

  • More work with composers
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Application of wave field synthesis in electronic music and sound installations

Where can I hear it?

  • Sound installation:

* 13:00-14:00 and 19:00-20:00 each day of the LAD * today: 19:00-21:00 * and on appointment

  • Workshop on Saturday, starting at 15:00

“Kleine Studio”, next to the Kubus, First Floor

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Application of wave field synthesis in electronic music and sound installations

More info

  • Web:

* http://www.nescivi.de

  • Email:

* marije@baalt.nl