ATT @ IRCAM Paris

Date: 
16. June 2006
City: 
Paris
Country: 
France
Event Description: 

ATT performance at the NIME06 Conference at IRCAM

ATT @ radio OE1

Date: 
21. October 2005
City: 
Vienna
Country: 
Austria
Event Description: 

ATT within ZeitTon on the public austrian radio station OE1

ATT @ ZKM Karlsruhe

Date: 
21. April 2005
City: 
Karlsruhe
Country: 
Germany
Event Description: 

ATT performance at the at the Linux Audio Conference 2005 at ZKM Karlsruhe

ATT @ first international pd~convention

Date: 
30. September 2004
City: 
Graz
Country: 
Austria
Event Description: 

ATT performance at the first international pd~convention

ATT @ Minoriten Graz

Date: 
6. June 2004
City: 
Graz
Country: 
Austria
Event Description: 

ATT - acoustical table tennis

Year: 
2004
Authors: 
Georg Holzmann
Project Description: 

ATT, acoustical table tennis, is a mixture of a performance and a audio-visual installation for 8 or 12 speakers spread over the room, 1 table tennis ball, a video projector and a computer.
The sound materials are live sampled table tennis balls and the composition rules are derived from the table tennis rules.

ATT pipe: live sampling of the table tennis ballATT pipe: live sampling of the table tennis ball

The speakers are divided in 2 players (one player at the right, one at the left side - see picture2) and they are controlled via specific probability functions (markov chains).
The game is over if one player reaches 21 points (like in the original game rules). The current points of the players are displayed very large with a video projector.

As an additional dimension the room/place comes into the game: With the 12 speakers the table tennis field is enlarged and the listeners can walk through this field hearing the "acoustical balls" flying from one player to the other.

ATT speakers: speaker arrangement, the two playersATT speakers: speaker arrangement, the two players

In contrast to the "real" table tennis more and more balls are sampled and get into the game. So a very complex sound network becomes spread over the whole room/place.

The exciting thing: You never know in advance which player wins and how much time he will need to eliminate the adversary!

ATT interface: PD patch interfaceATT interface: PD patch interface

This project is realized explicitly with open source software under Linux.
For audio-synthesis, generating the video-display and all the program logic I used Pd and made some stuff in C for PD.

For the live-sampling I built a transparent pipe with an integrated microphone. So you can see the table tennis balls springing inside the pipe when they get sampled (see first picture).

I rebuild the table tennis rules with 2nd order markov chains, also implemented inside PD. The samples of the balls are stretched with some kind of granular synthesis - so the "2 players" can shoot their balls with "different velocities", different heights, etc.

Duration: ca. 10-15 minutes

Public Presentations and Performances: 
ATT @ first international pd~convention
Public Presentations and Performances: 
ATT @ IRCAM Paris
Public Presentations and Performances: 
unicorn and ATT @ Logos Foundation Ghent
Public Presentations and Performances: 
ATT @ Minoriten Graz
Public Presentations and Performances: 
ATT @ radio OE1
Public Presentations and Performances: 
ATT @ ZKM Karlsruhe
Public Presentations and Performances: 
ATT and notabs @ IEM Cube
Public Presentations and Performances: 
georg holzmann in art@radio Baltimore

ATT and notabs @ IEM Cube

Date: 
22. June 2004
City: 
Graz
Country: 
Austria
Event Description: 

ATT and notabs performance in the CUBE of the institute for electronic music, IEM.

notabs

Year: 
2004
Authors: 
Florian Hollerweger
Authors: 
Peter Plessas
Authors: 
Georg Holzmann
Project Description: 

This is a collection of PD-patches for "algorithmic composition" in realtime.
As data sources we used a MIDI-keyboard, MIDI-files, a microphone which produces MIDI-like events out of some sampled sounds and noise and some compositional structure-generators.
Now this bundle of events are transformed, filtered, etc. on three interconnected Laptops and sent to a sound-generator.

In the performance the automatic piano of Winfried Ritsch (see frühling, sommer, winter) was used as sound-generator.

Public Presentations and Performances: 
ATT and notabs @ IEM Cube
Recording: 
Documentation: 

GenGran @ IEM CUBE

Date: 
27. January 2004
City: 
Graz
Country: 
Austria
Event Description: 

GenGran performance in the CUBE of the institute for electronic music, IEM.

GenGran

Year: 
2004
Authors: 
Georg Holzmann
Project Description: 

Genetic algorithms are "intelligent" algorithms. They can evolve data in a similar way as our genetic code evolves in nature.
In this improvisation environment there's a performer, who interacts with the computer (= the genetic algorithm) and controls the composition. In that "communication system" the computer and the human are equal partners and operate with each other.

As sound synthesis GenGran is using granular synthesis.
Each grain is like a gene of a human. It has specific informations, which determines the sound, length, etc. of the grain (see picture). The sum of this grains is a population (= an individual sound stream).

GenGran ParametersGenGran Parameters

In GenGran there are six parallel grain populations and one structure population.
The grain populations evolve parallel and have access to different samples. So each population can have it's individual sound character.
The structure population can also be modified via a genetic algorithm and triggers the overall structure of the improvisation.

GenGrain InterfaceGenGrain Interface

I made two versions of GenGran: GenGran-stereo and GenGran-multichannel.
In GenGran-multichannel an additional dimension gets into the improvisation: the spatialisation of the grains in the room. This can be realized with a variable number of speakers (2-24) with an experimental positioning of them in the room - so I can react on the specific acoustic situation of the performance place.

My interest in GenGran is this special form of interactivity: Not only the performer determines the evolving composition - he is also influenced by the genetic algorithm and vice versa !

GenGran is realized with the open source software PD and with some stuff in C.

duration: from min. 10 to max. 45 minutes

Public Presentations and Performances: 
GenGran @ IEM CUBE
Public Presentations and Performances: 
georg holzmann in art@radio Baltimore
Recording: 
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