March 2012 - chuck-users - lists.cs.princeton.edu

Re: [chuck-users] Most recent Chuck for Lion?
by Anthony Bowyer-Lowe 09 Apr '12

09 Apr '12

> > I've been running Chuck on a MacPro with a Cinema Display, and I notice > that the audio device switching isn't handled well by either the > hardware/OS, or other audio apps. Often I have to diddle around with the > Sound Preferences output to get Amadeus or Reaper to play to my headphones, > or the display audio, instead of the internal speaker. So perhaps this has > something to do with it. > I can't promise this will help, but I'm a fan of running Rogue Amoeba's free Sound Source app on OS X which makes selecting the machine's audio output really quick and simple: http://rogueamoeba.com/freebies/ (bottom of page) It overrides the Mac's automatic device switching so just may be a fix. I don't know if it works on Lion - it's a bit old - but it functions great on Snow Leopard. Anthony.

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Various general questions
by Robin Haberkorn 31 Mar '12

31 Mar '12

Hi! I'm relatively new to ChucK. I knew it for some time but only now I start using it "seriously". I have a couple of questions and hope that you may answer them: 1) Does ChucK have a public source repository? (This question may be off-topic...) I understand that CVS was used but I think I read somewhere that it was replaced with SVN. The Git repo here (http://repo.or.cz/w/chuck-blob.git) hasn't been updated for a long time and thus cannot reflect the recent changes some of you are talking about in the mailing list. Having a public repo somewhere could greatly facilitate the project and I feel that it is a must-have for every modern open source project. As I'm a developer myself, I might get tempted to fix one of the many bugs ChucK unfortunately still has. Without the repo, I cannot check whether it is already fixed in the development branch. Without the repo or any nightly exports, people cannot try out and test new features, give feedback, etc... 2) Is there a real bug tracker somewhere? I found the one in the wiki, but it is somewhat confusing... 3) Is there a way to use multiple sound devices in one ChucK VM? I'm using chuck 1.2.1.3 on Linux-ALSA. It seems I have to specify the dac on the command line (--dacX). This could probably be used to start one VM per soundcard and exchange audio data via netout/netin. I will try this soon. However just out of curiosity, is multiple-dac support in one VM anticipated some time in the future? 4) regarding netout/netin. This may also be useful for integration with other applications like Pure Data. Does anyone have experience with it or details about the protocol if there is any? If not I will have a look at it as soon as I need it and write a Pure Data external if necessary. 5) I read about an Un-Chuck operator (=<). However it appears nowhere in the current docs. Is it still supported, or temporarily disabled? 6) In the "Developer Guide" I read something about OpenGL support. This was the only mention of OpenGL support I came across. I suppose if this really exists, it is a new development feature since v1.2.1.3 does not appear to posses any (undocumented) OpenGL API. Best regards, Robin Haberkorn

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Reading sample's value
by Matt Bard 31 Mar '12

31 Mar '12

ChucK users, Is there a way that I can read individual sample's values? Does ChucK have some method of giving me those as floats/ints? I'd like to monitor each sample's current value to create a Schmitt Trigger, for example. Thanks,Matt

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utility code for sending MIDI messages
by Michael Heuer 19 Mar '12

19 Mar '12

Hello ChucKers, Does anyone have utility code for sending MIDI messages? I've done plenty with MidiIn and OscIn/Out before but have just started working on something to send MIDI to an instrument. I don't really want to have to do setting of MIDI status bytes and such myself. michael

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Spring Equinox Performance and ChucK Program
by Lester Hall 19 Mar '12

19 Mar '12

Hellooooo there ChecKists! I remember the date when I first met my buddy ChucK: October 13, 2007. That was also the day that I found electro-music.com, where the ChucK forum resides. I was a very bitter, angry, broken person back then and in the past four and a half years I have all but totally healed from that nightmare to become the very happy and satisfied person that I am today. It was the mighty power of ChucK and the electro-music community that were the most significant influences, well second to my walk with God but nothing tops that, which were responsible for that amazing transformation. Fast forward to this past Saturday and we had our Spring Equinox event, an annual celebration of music and friendship and good times. I wasn't sure what do do musically and I ended up creating a pretty good ambient synthesizer program if I do say so myself. At the last minute my friend Shane Morris prompted me to say a final message to close out the show as I was the last performer. Wondering if my faulty mic would hold up, I ended up talking the whole way through about personal stuff that everyone knows about but needs to be said once in a while. I talked about the ocean, the universe, eternity, and stuff like that as well. It turned out to be a very satisfying performance after all. If you would like to hear this performance (45 * 60 :: second => now; // duration of recording), please see this thread: http://electro-music.com/forum/viewtopic.php?t=52293&start=50 and scroll down to the entry by "Inventor", which is my electro-music nickname. There you will also find ChucK source code for the ambient program that I ran as well as the corresponding OSCulator config file for setup of two WiiMotes (optional but highly recommended). I hope that some of you enjoy my work and get a laugh or two and maybe even a tear in your eye as I did from the whole thing. Thanks to all who have contributed to ChucK over the years, you really did make a difference in at least one guy's life. Les Hall (Inventor)

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what have I stumbled upon this time?
by Michael Heuer 15 Mar '12

15 Mar '12

Hello ChucKers, Has anyone ever seen the value of a method parameter change based on the value of some other method parameter? The following class, when run after the LiCK library has been loaded, public class MethodNameBug { fun void methodName(int intValue) { <<<"methodName(int)",intValue>>>; } fun void methodName(float floatValue) { <<<"methodName(float)",floatValue>>>; } fun void methodName(int intValue, dur duration, Interpolation interpolation) { <<<"methodName(int, dur, Interpolation)",intValue,duration,interpolation>>>; } } MethodNameBug bug; bug.methodName(60); bug.methodName(2.0); CubicIn cubicIn; bug.methodName(60, 1::minute, cubicIn); 2::second => now; results in "LiCK imported." : (string) [chuck](VM): sporking incoming shred: 1 (MethodNameBug.ck)... methodName(int) 60 methodName(float) 2.000000 methodName(int, dur, Interpolation) 1078853632 2646000.000000 0x4eef80 Somehow the int value 60 passed in as intValue parameter is interpreted as 1078853632 in the methodName(int, dur, Interpolation) method call. Now here's where it gets odd. CubicIn is a LiCK class that extends from Interpolation, and Interpolation extends FloatFunction, all short functor-style classes CubicIn.ck: public class CubicIn extends Interpolation { fun float evaluate(float value) { return Math.pow(value, 3.0); } } Interpolation.ck: public class Interpolation extends FloatFunction { // empty } FloatFunction.ck: public class FloatFunction { 0.0 => float default; fun float evaluate(float value) { return default; } } If instead I instantiate and pass an interpolation instead Interpolation interpolation; bug.methodName(60, 1::minute, interpolation); it works. "LiCK imported." : (string) [chuck](VM): sporking incoming shred: 1 (MethodNameBug.ck)... methodName(int) 60 methodName(float) 2.000000 methodName(int, dur, Interpolation) 60 2646000.000000 0x69dfe0 Changing the method signature to accept an Object, or a string, or another primitive value also works. Object object; bug.methodName(60, 1::minute, object); methodName(int, dur, object) 60 2646000.000000 0x110b830 bug.methodName(60, 1::minute, "message"); methodName(int, dur, string) 60 2646000.000000 message bug.methodName(60, 1::minute, 42); methodName(int, dur, int) 60 2646000.000000 42 I have a special set of swear words reserved for ChucK, and I'm afraid I've use them all up by this point. Any ideas? michael

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Ambient space music program
by Lester Hall 14 Mar '12

14 Mar '12

Hello, please see this forum entry: http://electro-music.com/forum/viewtopic.php?p=356337#356337 for an OSCulator / WiiMote controlled space music program called Ambient 3. It plays without OSCulator and the two WiiMotes, but is way better with them. I included the OSCulator config file for your convenience. Our expert on ambient, Shane Morris, gave it high praise. It uses IFFT and pitch shifting and stuff like that. I'm going to do a 1/2 hour performance with it to close out the Spring Equinox show this weekend (tune in to electro-music radio). Enjoy. Les (Inventor)

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netin and netout
by David Ogborn 14 Mar '12

14 Mar '12

Hi all, Does anyone know what the story is with the netin/netout opcodes? A search of the list over the last couple of years shows that this question has come up several times without much of an answer. A quick peak at the 1.2.1.3 Chuck source code reveals a commented out line about "net". A Google search shows a file that used to be in the code but apparently isn't now ulib_net.cpp, which has code for the netin/netout opcodes. It looks like it was taken out. Does anyone know why? (Corollary: Does anyone know why it should not be put back in?) 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

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SBBD show
by Hans Aberg 09 Mar '12

09 Mar '12

FYI, a fun show. Might work well with a ChucK adaptation and a couple of laptops. Hans https://www.youtube.com/watch?v=W_6SfMZxoLc

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include/import (am noob)
by George Locke 05 Mar '12

05 Mar '12

Hi, I want to make a library of functions that I can call from any chuck script. If I put those functions in one file, how do I access them from another? It would be great if I could make them into a new namespace, akin to Std.X or Math.X (I am using miniAudicle 0.2.0, not command line.) (I checked the language specification for the words "include" and "import" and found nothing relevant.) Thanks, George (I am new to chuck, but not to computer programming, nor computer audio.) PS is there a popular/built-in solution for making exponentially distributed, normally distributed, etc random variables? PPS If not, I'd be happy to share my work - is there a common way for people to share code like this?

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