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chuck --probe output: not stdout
by mike clemow 01 Mar '13

01 Mar '13

Hi Chuckists, system: mac 10.7.3, chuck 1.3.1.3 (64 bit) So, when I type `chuck --probe` I get the usual output to the console. Now, this has always been the case, however, I'm just now asking about it; chuck does not seem to be sending that output to stdout. I can't access it that way. In fact, if I want it in a file, I have to use script. Where is that console output going? Why is it not going to stdout? Sorry if this question has been answered before. Best, Mike http://michaelclemow.com http://semiotech.org

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Latest on subclassing UGen within ChucK?
by Chris Harris 22 Feb '13

22 Feb '13

Can you create a UGen in the ChucK language, by subclassing the UGen class? Because I just tried to do it for a couple hours and it was frustrating the heck out of me. The documentation makes it seem like it should work. (ChucK has virtual methods, and you can subclass UGen. So why wouldn't it work.) So something like this should be viable: class IGen extends UGen { SinOsc osc => blackhole; // Docs don't make it clear how all the methods should work, but // at least last() seems more or less straightforward: 1 => int first; fun float last() { if (first) { return 0.0; } else { 0 => first; return osc.last(); } } } IGen fg => dac; 4::day => now; This whole thing compiles fine and runs in the VM without errors. The only problem is that none of the methods defined on IGen get called, nor does any sound come out. Unless I'm totally doing it wrong, I'm suspecting you can't, in fact, make a viable UGen subclass using the ChucK language itself (vs C++ or whatever). If this sort of subclasses can't work, a nice improvement would be for ChucK to provide an error here. Is there any legitimate reason to subclass a UGen in ChucK language? If not, attempting to do so should generate a compile error. Alternatively, maybe trying to chuck a non-C++ Ugen subclass into another Ugen (and especially into dac) should throw a runtime error. I did finally find about the chugen facility, which seems like a neat alternative. But it was not an easy find. So I guess some documentation updates might be in order too. A note that you can't write UGens in ChucK and a mention that chugen stuff exists. Not sure if I'll have time to look into all this or not. But I wanted to start by getting the facts straight. Thanks, Chris

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chaos prototype
by vilbjørg broch 17 Feb '13

17 Feb '13

Hello Chuck list I have been on this list just shortly, and saw no questions coming around , but i read that the list is also for questions ,, so hope its ok.. I have been trying to realize a 'prototype' for experimenting with chaos, fractals etc. as sound in Chuck. My aim is to find a good working template which i can use to test higher dimensional and larger algorithms quickly. I have read through the 4 page pdf :: CHUGENS, CHUBGRAPHS, CHUGINS: 3 TIERS FOR EXTENDING CHUCK and understand that the most efficient will of course by to write a Chugin,, but anyway looking for fast solutions in Chuck for now. My test is done with iterating 1-dimensional (1 variable) algorithm and using the output to move the phase of a complex signal. I have realized many versions of the exact same algorithm using different possibilities in Chuck . I have pasted the code of 3 versions beneath , the different files are separated by ----------------------------------------------------- Each has some problems which I have not been able to find solutions for in the doc, therefore this mail .. (well,, no real background CS, may be one reason) My objectives with the template are foremost: a) to be able to let some variables continue their orbits undisturbed while other parameters receive new values. b) to be able to realize higher dimensional algorithms and output the values separately. Multiple outputs 1 . Chugen,, the control of the parameters works really well, but i cannot find a way to make more than 1 output.. I cannot get my eyes on how to assign several tick functions to specific outputs.. 2. Class.. using 2 * Impulse for 2 different outputs, which works , but whoops I am stuck in the first loop 3. also worked a bunch with the event, but the events layering got very cpu intensive, besides I have some problems with having to reset certain variables for new event signal which i would prefer not to reset... Hope someone feels like looking at it, if there would be more outputs to the Chugen then forget the rest. I can use that very well . much greetings Vilbjørg // 1.... SINKX - very simple chaos generator ::: x(n+1) = sin ( k * x(n)) --- Chugen for ChucK // missing the possiblity for 2 or more outputs class SinKX extends Chugen { 0.3 => float x; // starting value != 0 (sin(0) = 0 , its a static point) 3.09287 => float k; //takes you through the bifurcation diagram; 25 => int itp; // iteration period 25 => int inp; // ramp period 0.0 => float zphase => float zphaseprevious => float zphaseinterpolated => float zphaseincrement; 0.2 => float zmag; // determines amplitude of waveform 0 => int i; fun float tick(float in) { if (i == 0) { zphase => zphaseprevious; Math.sin(k*x) => x; (x + zphase) % 2*pi - pi => zphase; (zphase-zphaseprevious)/inp => zphaseincrement; } else { zphase => zphase; zphaseincrement => zphaseincrement; } zphaseincrement + zphaseinterpolated => zphaseinterpolated; %(zmag , zphaseinterpolated) => polar zpolar; zpolar $ complex => complex z; (i + 1) % itp => i; return z.re; } } SinKX skx => Gain g => dac; 0.3 => g.gain; 0 => int ii; while(true) { if (ii == 0) { 8.301345 => skx.k; 3000 => skx.itp; 30 => skx.inp; <<< skx.x, skx.k, skx.itp, skx.inp, skx.zphase, skx.zphaseprevious, skx.zphaseincrement >>>; } if (ii == 6) { 7.789123 => skx.k; 8 => skx.itp; 8 => skx.inp; <<< skx.x, skx.k, skx.itp, skx.inp, skx.zphase, skx.zphaseprevious, skx.zphaseincrement >>>; } if (ii == 8) { 6.08 => skx.k; 1200 => skx.itp; 12 => skx.inp; <<< skx.x, skx.k, skx.itp, skx.inp, skx.zphase, skx.zphaseprevious, skx.zphaseincrement >>>; } if (ii == 12) { 5.011345 => skx.k; 100 => skx.itp; 100 => skx.inp; <<< skx.x, skx.k, skx.itp, skx.inp, skx.zphase, skx.zphaseprevious, skx.zphaseincrement >>>; } if (ii == 18) { 7.789123 => skx.k; 500 => skx.itp; 50 => skx.inp; <<< skx.x, skx.k, skx.itp, skx.inp, skx.zphase, skx.zphaseprevious, skx.zphaseincrement >>>; } if (ii == 24) { 5.78916 => skx.k; 40 => skx.itp; 40 => skx.inp; <<< skx.x, skx.k, skx.itp, skx.inp, skx.zphase, skx.zphaseprevious, skx.zphaseincrement >>>; } ii++; Math.random2f(0.5, 2.0)::second=>now; } --------------------------------------------- // 2... first part with the sinkx class works ok but i do not manage to vary parameters,, see beneath, Impulse i1 => dac.left; Impulse i2 => dac.right; 0.3 => i1.gain => i2.gain; class sinkx { 0.3 => float x; // starting value not 0 (sin(0) = 0 , its a static point) 0.0 => float zphase => float zphaseprevious => float zphaseinterpolated => float zphaseincrement; 0.2 => float zmag; // determines amplitude of waveform 0 => int i; // sample counter fun float f(float k, int itp, int inp) { while (true) { if (i == 0) { zphase => zphaseprevious; Math.sin(k*x) => x; x + zphase => zphase; (zphase-zphaseprevious)/inp => zphaseincrement; } else { zphase => zphase; zphaseincrement => zphaseincrement; } zphaseincrement + zphaseinterpolated => zphaseinterpolated; %(zmag , zphaseinterpolated) => polar zpolar; zpolar $ complex => complex z; z.re => i1.next; z.im => i2.next; (i + 1) % itp => i; 1::samp => now; } } } 0 => int iii; sinkx skx; skx.f(6.08, 3000, 30); // here trouble, probably my lack of computer science, code never moves past this function call Math.random2f(5.0, 10.0)::second => now; // to the next, I guess because of the endless while loop in the function skx.f.. skx.f(6.78, 300, 30);// maybe i need a second layer of abstraction??? to move further in the code??? //////////////// ...... any hints????? ----------------------------------------------------------------------------- // 3. event-- SINKX - very simple chaos generator ::: x(n+1) = sin ( k * x(n)) // the events layering get very cpu expensive //did not mange to leave the 'phase' untouched for new event.. Impulse i1 => dac.left; Impulse i2 => dac.right; 0.3 => i1.gain => i2.gain; Event e; 0.3 => float x; // starting value != 0 (sin(0) = 0 , its a static point) // //for some reason it is not possible to move the declararion of the phase out here, side-effects not quite understood. // //consequently the phase is reset for each new k / event; //0.0 => float zphase => float zphaseprevious => float zphaseinterpolated => float zphaseincrement; //0.2 => float zmag; // determines amplitude of waveform //0 => int i; // sample counter fun int sinkx( Event e, float k, int iterationperiod, int interpolationperiod) { 0.0 => float zphase => float zphaseprevious => float zphaseinterpolated => float zphaseincrement; 0.2 => float zmag; // determines amplitude of waveform 0 => int i; while( true ) { e => now; <<< x, k, iterationperiod, interpolationperiod, zphase, zphaseprevious, zphaseincrement, i >>>; while (true) { if (i == 0) { zphase => zphaseprevious; Math.sin(k*x) => x; (x + zphase) % 2*pi - pi => zphase; (zphase-zphaseprevious)/interpolationperiod => zphaseincrement; } else { zphase => zphase; zphaseincrement => zphaseincrement; } zphaseincrement + zphaseinterpolated => zphaseinterpolated; %(zmag , zphaseinterpolated) => polar zpolar; zpolar $ complex => complex z; z.re => i1.next; z.im => i2.next; (i + 1) % iterationperiod => i; 1::samp => now; } } } spork ~ sinkx( e, 8.301345, 3000, 30 ); // (e, k, iterationperiod, interpolationperiod) spork ~ sinkx( e, 8.335123, 8, 8 ); spork ~ sinkx( e, 8.301345, 1500, 15 ); // k takes you through the bifurcation diagram; spork ~ sinkx( e, 7.97865, 500, 50); spork ~ sinkx( e, 8.301345, 3000, 30 ); // for linear interpolation/ ramp:: iteration period >= interpolation period spork ~ sinkx( e, 5.78916, 25, 25); // and spork ~ sinkx( e, 5.78916, 5000, 20 ); //iterationperiod modulo interpolationperiod = 0; me.yield(); while( true ) { e.signal(); Math.random2f(5.0, 10.0)::second => now; // 5::second => now } // the random timing makes x take a slithly different orbit for each k for each run,

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import and play a sound
by Franco 13 Feb '13

13 Feb '13

Good evening ChucK users, pardon the incredibly naive question, but what's the function to import (and subsequently play) a sound? Currently I am fiddling (and having much fun) with oscillators, but I would like to mess with 'organic' sounds too. I tried to search the manuel for 'import', but no dice. Thanks in advance -Franco

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Re: [chuck-users] Cybernetic Orchestra 2nd CD release: Shift
by David Ogborn 08 Feb '13

08 Feb '13

Hello again, Further to my earlier email: Please note that the concert tonight in Hamilton's art crawl has been cancelled due to the snowfall and bad state of the roads. We do expect to be still on for tomorrow night in Toronto! If you wanted to hear us tonight, check out the new album via soundcloud - hopefully we will see some of you tomorrow! Yours truly, David ------------------------------------------------------------------- Dr. David Ogborn, Assistant Professor Communication Studies & Multimedia Director, Cybernetic Orchestra & ESP Studio McMaster University, Hamilton, Canada ogbornd --at-- mcmaster.ca http://davidogborn.net http://twitter.com/ogbornd http://esp.mcmaster.ca (Cybernetic Orchestra) 1-905-525-9140 ext 27603 On 2013-02-08, at 11:02 AM, David Ogborn <ogbornd(a)mcmaster.ca> wrote: > Dear friends, > > The Cybernetic Orchestra (at McMaster University, Hamilton, Canada) is pleased to announce the release of our second CD "Shift"! > > The album features further development of the orchestra's "staples" (network synchronized beats, live coding in the ChucK programming language) as well a guest performance by Montréal tabla player Shawn Mativetsky. > > We're celebrating the release with 2 album release parties this weekend - in Hamilton Friday night and then in Toronto Saturday night (details below). Before and after the parties you can listen to, or download, the entire album online (free, open access). > > Enjoy - and say hi if you come to the release parties! > > Yours truly, > David > > ---the details--- > > Soundcloud: http://soundcloud.com/cyberneticOrchestra/sets/shift > > Hamilton CD release event: Fri 8 Feb 2013, 7-11 PM, Factory Media Centre, 228 James Street N, Hamilton. From 7-9:30 there will be live coding duos and trios (including Scott Wilson (UK), Julian Brooks (UK), Ian Jarvis, schmoog lebowski, Dima Matar, Hut, Bonaventure, Nopeople, Amy McIntosh and extramuros) then at 9:30 the Cybernetic Orchestra will take the stage. Free / Pay-What-You-Can. > > Toronto CD release event: Sat 9 Feb 2013, 8-10 PM, Gallery 345, 345 Sorauren Avenue, Toronto. $20; $15 Seniors & Arts Workers; $10 Students. > > Album contents: > 1. Five functions (David Ogborn - composition; Shawn Mativetsky - tabla) > 2. Serendipity (Amy McIntosh - composition) > 3. Shift (improvisation; Jason Rule - mixing) > 4. Till this day (improvisation; Alyssa Lai - mixing) > 5. Delineate (Heather Kirby - composition) > 6. [Power]/[Reset] (improvisation; Elise Milani - mixing) > 7. Light-frame (improvisation; Joy Dertinger - mixing) > 8. Contact (improvisation; Dima Matar - mixing) > 9. Feathers (improvisation; Joy Dertinger - mixing) > > Orchestra members: Ned Currie, Joy Dertinger, Myles Herod, Steve Hudak, Aaron Hutchinson, Heather Kirby, Alyssa Lai, Dima Matar, Amy Mcintosh, Luke Meneok, Elise Milani, David Ogborn, Jason Rule, Kearon Roy Taylor > > -------------------------------------------------------------------------- > Dr. David Ogborn, Assistant Professor > Communication Studies & Multimedia > Director, Cybernetic Orchestra > McMaster University, Hamilton, Canada > > http://esp.mcmaster.ca > http://davidogborn.net > http://twitter.com/d0kt0r0 > 1-905-525-9140 ext 27603 >

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Cybernetic Orchestra 2nd CD release: Shift
by David Ogborn 08 Feb '13

08 Feb '13

Dear friends, The Cybernetic Orchestra (at McMaster University, Hamilton, Canada) is pleased to announce the release of our second CD "Shift"! The album features further development of the orchestra's "staples" (network synchronized beats, live coding in the ChucK programming language) as well a guest performance by Montréal tabla player Shawn Mativetsky. We're celebrating the release with 2 album release parties this weekend - in Hamilton Friday night and then in Toronto Saturday night (details below). Before and after the parties you can listen to, or download, the entire album online (free, open access). Enjoy - and say hi if you come to the release parties! Yours truly, David ---the details--- Soundcloud: http://soundcloud.com/cyberneticOrchestra/sets/shift Hamilton CD release event: Fri 8 Feb 2013, 7-11 PM, Factory Media Centre, 228 James Street N, Hamilton. From 7-9:30 there will be live coding duos and trios (including Scott Wilson (UK), Julian Brooks (UK), Ian Jarvis, schmoog lebowski, Dima Matar, Hut, Bonaventure, Nopeople, Amy McIntosh and extramuros) then at 9:30 the Cybernetic Orchestra will take the stage. Free / Pay-What-You-Can. Toronto CD release event: Sat 9 Feb 2013, 8-10 PM, Gallery 345, 345 Sorauren Avenue, Toronto. $20; $15 Seniors & Arts Workers; $10 Students. Album contents: 1. Five functions (David Ogborn - composition; Shawn Mativetsky - tabla) 2. Serendipity (Amy McIntosh - composition) 3. Shift (improvisation; Jason Rule - mixing) 4. Till this day (improvisation; Alyssa Lai - mixing) 5. Delineate (Heather Kirby - composition) 6. [Power]/[Reset] (improvisation; Elise Milani - mixing) 7. Light-frame (improvisation; Joy Dertinger - mixing) 8. Contact (improvisation; Dima Matar - mixing) 9. Feathers (improvisation; Joy Dertinger - mixing) Orchestra members: Ned Currie, Joy Dertinger, Myles Herod, Steve Hudak, Aaron Hutchinson, Heather Kirby, Alyssa Lai, Dima Matar, Amy Mcintosh, Luke Meneok, Elise Milani, David Ogborn, Jason Rule, Kearon Roy Taylor -------------------------------------------------------------------------- Dr. David Ogborn, Assistant Professor Communication Studies & Multimedia Director, Cybernetic Orchestra McMaster University, Hamilton, Canada http://esp.mcmaster.ca http://davidogborn.net http://twitter.com/d0kt0r0 1-905-525-9140 ext 27603

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Ibniz chugin available soon
by Julien Saint-Martin 03 Feb '13

03 Feb '13

Hi all, I integrated Ibniz software (http://pelulamu.net/ibniz/) inside a chugin. First version is ready and I want to share it with you. I know the Spencer's github chugin reporsitory. Is it a good idea to put it in? If yes, I never used github before please tell me if there is something special to do. One other things, I work on linux so I did not updated the VisualC++ .dsp file. Can someone look at this once the project will be uploaded? For OSX I think it is ok because the makefile seems to be shared. Cheers, Ju

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LAC 2013: the Linux Audio Conference - Deadline Extension
by Florian Hollerweger 02 Feb '13

02 Feb '13

sorry for >< please >> << Hi all, The Linux Audio Conference submission deadline has been extended! It is now February 17th, 2013 (23:59 HAST). So, if you were considering to submit a paper but couldn't make up your mind yet, here is your chance to become active! Never forget that this conference lives through the people participating in it. FEBRUARY 17th is the new deadline for all submission types: papers, music, installations, workshop proposals. Check out the link below more info: http://lac.linuxaudio.org/2013/participation Please spread this information to anyone who might be interested. If you have any questions, drop us a line at lac(a)linuxaudio.org We are looking forward to seeing you in Graz in May! Thanks and happy last-minute music-and-paper-submissions, the LAC2013 organization team --- LAC 2013: the Linux Audio Conference May 9-12, 2013 @ IEM, Graz/Austria lac(a)linuxaudio.org http://lac.iem.at

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Faculty Job Announcement, Columbia University
by Brad Garton 25 Jan '13

25 Jan '13

Hello chuck-people! Sorry for the cross-postings, we want to get the word out. Please feel free to repost this. ---------------------------- Assistant Professor of Professional Practice The Visual Arts Program of the School of the Arts, in collaboration with the Department of Music, seeks to fill the position of Assistant Professor of Professional Practice in Visual Arts in the School of the Arts, Columbia University, effective July 1, 2013. The Program seeks applications from persons with a vibrant studio practice in the intersection of the visual and sound arts and a demonstrated ability to teach and mentor graduate students. The incumbent will help lead the implementation of a new interdisciplinary area of graduate study in sound arts, offered by the School and the Department of Music, leading to a Master of Fine Arts degree awarded by the School of the Arts. The new interdisciplinary area of study will engage the resources of both the Center for Computer Music in the Department of Music and the Visual Arts Program (Sculpture: New Genres) in the School of the Arts. For more information visit: http://academicjobs.columbia.edu/applicants/Central?quickFind=57014 Columbia University is an Equal Opportunity/Affirmative Action employer. ---------------------------- This position is in conjunction with our new "Sound Arts" MFA program. We are also currently accepting applications for the Sound Arts MFA. Please visit: http://arts.columbia.edu/sound-arts for more information. Brad Garton Chair, Search Committee http://music.columbia.edu/~brad

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Musical Metacreation Weekend (MUME-WE-2013) - Call for Participation
by alex 21 Jan '13

21 Jan '13

Musical Metacreation Weekend (MUME-WE-2013) - Call for Participation ======================================================= Musical Metacreation Weekend (MUME-WE-2013) Sydney Design Lab, University of Sydney June 14th-16th 2013 http://www.metacreation.net/mumewe2013/ ======================================================= Musical Metacreation is a forum for the emerging community of people making software that autonomously generates music. It engages with science, design, technology, philosophy, culture and aesthetics. Following the 1st International Workshop on Musical Metacreation of October 2012 (MUME 2012: http://www.metacreation.net/mume2012/), we are happy to announce MUME-WE-2013 in Sydney, a weekend of concerts, installations, panels, demos and other music listening. ======================================================= *** Call for Contributions and Participation *** Contributions are invited that fit the MuMe themes, in any of the following categories: music composition and performance systems, generative sound installations, audio-visual documentation. Contributors are not required to attend in person, as long as their work can be easily run in their absence. MuMe 2013 is music-only, with no paper track. * Themes * Musical Metacreation is concerned with autonomy and agency in software that makes music. A precise definition of how these terms apply to music remains itself an active area of enquiry, and individual projects can make their own case for how they address these aspects of behaviour. MuMe accepts submissions in the form of: • Systems that compose and/or interpret music • Systems that improvise with human musicians • Generative sound installations • Composition based on artificial life and artificial intelligence • Systems that engage in creative search or enhance the search process using advanced computing methods * Composition and Performance Systems * Music generating software that is designed to generate music all or in part by itself, either in the context of original music composition, or interactive improvised music performance. Three music events will be held, providing three different contexts. Instrumental musicians will invited on the basis of successful contributions. - algorave: an electronic dance music event consisting entirely of generative music in a club environment. - instrumental improvisation: a concert of free improvised music in which instrumental musicians are paired with algorithmic software systems to perform duets. - composed/conceptual: an electroacoustic concert for work involving computer-composed (realtime or offline) musical elements. * Generative Sound Installations * Continuously running generative installations, ranging from full artworks to high-quality demos. No budget is available for the setup of installations, but we can provide computers, speakers and projectors, as well as a number of spaces to present works. This includes a computer lab (Macintosh), allowing for the presentation of distributed works. * Audio-Visual Documentation of MuMe Systems * Recordings of music-generating systems with additional film content. Producers of algorithmically generated music are invited to submit fixed works in video format, for presentation in a “continuous listening room” at the event, but also later on the web. The work should take the following form: the audio should be a standalone, professionally produced stereo track of up to 15 minutes in length. The video should be an additional layer synched to the audio, strictly for the purpose of describing and explaining the work. This could be a slideshow, an informative visualisation of the music or a film with subtitles. The video should be treated strictly as an explanatory element for listeners to gain a detailed understanding of the system, and not as an artistic element, whereas the audio should be considered the opposite. Submission format: minimum requirements, HD 1920x1080 Quicktime Movie, with 44.1Khz, 16-bit stereo audio. * Panel Sessions * Panel sessions will be by invite from amongst participating artists. Please indicate if you would be interested in participating in a panel session. Non-attendees may join in over Skype. * No Paper Submissions * Although MuMe also exists as a conference workshop, the MuMe Weekend will not have a paper track. However, the MuMe weekend will be flanked by three conferences that will be highly relevant to participants (see below). Please note that the MuMe committee is not formally connected to these conferences and has no influence on paper acceptance. * Submission Process * Please use the following online form for submission: https://docs.google.com/spreadsheet/viewform?formkey=dC1FdmU1ZW1tQU1RajRGSn… Submissions will pass through a peer-review process and a curatorial panel process. The ultimate decision will lie with the organising committee and guest curators. Selection will be based on: relevance to the MuMe themes, technical quality, artistic quality, practicality (in terms of tech requirements etc.). Please note that contributors are not required to attend the event as long as their works can easily be set up and run without them being present. * Important Dates * Expressions of interest (optional, but we would appreciate it if you contact us if you intend to submit): ASAP Submission deadline: February 8th, 2013 Notification: March 8th, 2013 MuMe Weekend: June 14th-16th, 2013 Other events happening in Sydney in June 2013: • the International Conference on Computational Creativity (ICCC) http://www.computationalcreativity.net/iccc2013/ • Vivid Festival of Light, Music and Ideas http://www.vividsydney.com/ • the ACM Creativity and Cognition Conference (C&C) http://cc13.creativityandcognition.com/ • the International Symposium on Electronic Arts (ISEA) http://www.isea2013.org/ ======================================================= *** Organising Committee *** Oliver Bown (Design Lab, University of Sydney) Philippe Pasquier (School of Interactive Arts and Technologies, Simon Fraser University) Arne Eigenfeldt (School for the Contemporary Arts, Simon Fraser University) *** Curatorial Committee *** George Lewis (Department of Music, Columbia University) Alex McLean (Interdisciplinary Centre for Scientific Research in Music, University of Leeds) Michael Young (Department of Music, Goldsmiths College, University of London) Tim Blackwell (Department of Computing, Goldsmiths College, University of London) Jon McCormack (Centre for Electronic Media Art, Monash University) Juha van ‘t Zelfde (Viral Radio founder, curator Bimhuis, Musiekgebouw, Amsterdam) Ivan Zavada (Conservatorium of Music, University of Sydney) Aengus Martin (Faculty of Engineering, University of Sydney) Bill Hsu (School of IT, San Francisco State University) Please direct all enquiries to Oliver Bown (oliver.bown(a)sydney.edu.au).

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