- chuck-users - lists.cs.princeton.edu

Chuck support for virtual MIDI devices
by Dany 06 Mar '13

06 Mar '13

Hi. Does chuck support input from virtual MIDI devices on Mac OS X 10.8.2? It seems that every time I try to open a MidiIn to a virtual device using the gomidi example, I get the following error: [gomidi.ck]: MidiIn: couldn't open MIDI port 0... `chuck --probe` reveals the following: [chuck]: ------( chuck -- 1 MIDI inputs )------ [chuck]: [0] : " mah midi source" [chuck]: [chuck]: ------( chuck -- 0 MIDI outputs )----- [chuck]: When I route my virtual device into Ableton, my virtual device works as expected. I tried swapping my virtual device with another one from the open source project VMPK (http://vmpk.sourceforge.net/). Chuck would open neither my virtual device nor VMPK. This could be a bug in chuck, but I'm not sure. Anyone have any ideas? Thanks, --Dany.

1 0

embedding ChucK, and Windows8, ARM, etc.
by Rob Fielding 02 Mar '13

02 Mar '13

I am using ChucK on an x86 based Windows8 large multitouch screen; as nothing more than a way to create a multi-voice OSC synth that I can describe to users how to install (at minimal cost) and get setup (with little expertise on their part). But Windows store apps (ARM, sandboxed - like on iOS), forces generally conspire to have you try to embed everything into a monolithic process. So: 1) The GPL licensing (SuperCollider as well as ChucK) seems to be an issue for anyone trying to host ChucK embedded into a controller process. Is this an actual problem, given that we are generally just linking in unmodified build of the sources? 2) What is going on with the future of ChucK? After tinkering around with the options for making an OSC synth to match my controller: 1) visual spaghetti code (Pd), 2) An ugly language in wide use (SuperCollider) 3) Hard (CSound) 4) Nice but not well known (ChucK). 3) Performance. I saw Ge Wang say that performance isn't a priority for ChucK, but have no idea what the practical implications are. Will there be (and do there need to be) target specific optimizations to take advantage of SIMD, and other ways of meeting performance goals, especially in the more constrained ARM environments? I haven't tried to do an ARM build of ChucK and get it installed onto Surface, but I read that you can't in general freely communicate between processes on localhost for store apps anyway (ie: OSC over UDP localhost); so that leads back to the problem hosting ChucK as an embedded library. -- http://www.youtube.com/rrr00bb http://rfieldin.appspot.com http://rrr00bb.blogspot.com

5 12

Re: [chuck-users] chuck --probe output: not stdout
by N. Cameron Britt 01 Mar '13

01 Mar '13

FWIW, I have piped chuck's output to stdout and used grep to remove messages that I didn't want displayed in the terminal window. Probably not smart for debugging, but it worked fine in performance. Cameron

1 0

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

5 6

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

4 5

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,

2 2

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

2 1

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 >

1 0

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

1 0

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

3 3