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

Re: [chuck-users] music made with chuck
by Inventor-66＠comcast.net 25 Jun '08

25 Jun '08

Here is a song I made with ChucK using my ChucK Lab software and Audacity to piece it together (warning it has harsh language and is very dark): http://www.freedomodds.com/music/songs/Schizophrenia.mp3 It's about my battle with schizophrenia. Folks on the forum liked it. Les Hall (Inventor)

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http://chuck.cs.princeton.edu/ down again
by Atte André Jensen 25 Jun '08

25 Jun '08

Hi http://chuck.cs.princeton.edu/ is down again 1) Can I find the html documentation somewhere else or do I have to wait for the site to come up and rip everything from the web? 2) Why is this site down so often? It's really a pain! -- peace, love & harmony Atte http://atte.dk | http://myspace.com/attejensen http://anagrammer.dk | http://modlys.dk

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feature ideas
by Renato Fabbri 22 Jun '08

22 Jun '08

my hacking skills are too small to do this things myself, so here goes some ideas for chuck: 1) the same chuck executable being able to output on both jack and alsa would be good. 2) I think that LISA would be even better if we could load a sound file directly like we do with SndBuf. Something like: "mysoundfile.wav" => mylisaobject.read; 3) If i spork a shred that defines a public class, i can't spork it again (if i need some changes in the class design for example). Is there a way to destroy or overwrite a class definition? thanks, renato

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nameless empty arrays
by Kassen 22 Jun '08

22 Jun '08

Dear list, //this is fine fun int[] foo() { return [1, 2, 5]; } //this isn't fun int[] bar() { return []; } ChucK and me disagree here. I'm of the opinion that "[]" is a perfectly fine array of integers (albeit of length 0) and hence correct. ChucK is of the opinion that there's a syntax error.I suppose the issue is in "[]" not having a explicid type but I said what the type was going to be up-front. In fact the only way of defining a array of length 0 seems to be this; int empty_int_array[0]; //and while we're at it float empty_float_array[0]; //etc I find that less then elegant. Yours, Kas.

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text highlighting
by Renato Fabbri 20 Jun '08

20 Jun '08

i think that i have seen something about text highlighting on the list. i wanted to use mini-audicle's highlighting on kate. any idea? (i can't reach the mailing lists archive)

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Envelope.rate() READ
by Kassen 19 Jun '08

19 Jun '08

Fellow ChucKists, Envelope.rate() is a read-write function so I thought I'd try to use it to detect the current movement of a envelope, like this: ========================================= Envelope e => blackhole; e.value(0); e.duration(second); e.target(1); now + 3::second => time later; while(now <later) { <<<e.rate()>>>; 10::ms => now; } ================ It now turns out that .rate(), when read from, reports the rate of change Envelope had when it was last set to a target, not necessarily it's current rate of change (which may well be 0). I'd like to propose this behaviour to be changed towards Envelope always reporting it's current rate of change. Because Envelope is a part of the STK we may need to be careful with that as other Ugens inherit from it so such changes might affect those. Still; there are a few STK Ugens that are on The List to have a look at because of their envelope (probably ADSR) based behaviour anyway. Stricktly speaking this change could break some ChucK code as well but I find it hard to imagine situations where the current behaviour is more usefull then my proposed change. Yours, Kas.

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Returning a Shred and crashing Chuck
by mike clemow 14 Jun '08

14 Jun '08

Hi folks! Riddle me this... This destroys poor Chuck after a short time: ----- class Forkable { // I am a process fun void run() { // sporkable code here... SinOsc s => dac; 100::ms => now; me.yield(); } } class Forker { // I fork a process (Forkable) fun Shred fork( Forkable f ) { // code that forks a Forkable spork ~ f.run() @=> Shred @ offspring; // RETURNING A SHRED OBJECT me.yield(); return offspring; } } Forkable forkable; Forker forker; while( true ) { forker.fork( forkable ); 50::ms => now; } ----- This, however, does not: ----- class Forkable { // I am a process fun void run() { // sporkable code here... SinOsc s => dac; 100::ms => now; me.yield(); } } class Forker { // I fork a process (Forkable) fun void fork( Forkable f ) { // code that forks a Forkable spork ~ f.run(); // NOT RETURNING THE SHRED OBJECT HERE me.yield(); } } Forkable forkable; Forker forker; while( true ) { forker.fork( forkable ); 50::ms => now; } ----- What gives? It apparently doesn't like the return of the Shred object. I'm not sure what's happening here. It's not *really* that important to me, but it would be nice to have the option of killing that process later. Any ideas? Am I doing something wrong??? Cheers, Mike -- http://semiotech.org http://deadlylittlepills.com/michael

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A new weird controller
by Martin Ahnelöv 12 Jun '08

12 Jun '08

This is basically a device that lets you manipulate 3d-games in the same way as the wiimote does, except that this one got force feedback so you can for example feel weather the surface you are touching is soft or hard, and so on. Maybe something to take on once you feel done with accelerometers? http://www.haptx.com/falcon/index.php "The Novint Falcon lets you feel high-fidelity three-dimensional force feedback (haptics), while controlling the game in three dimensions. The Falcon controller not only moves right, left, up and down, like a mouse, but also moves inwards and outwards for a true 3D touch enabled gaming experience." "The critics have so far been unanimous stating that the Falcon provides a more immersive and intense computer gaming experience, some even stating that it’s Nintendo Wii and Force Feedback on steroids." Enjoy, Gasten

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disabling autoconnect to jack
by Atte André Jensen 12 Jun '08

12 Jun '08

Hi I don't use chuck that much with jack, but now I might. However, chuck automatically connects its inputs/outputs to the soundcard, which is generally considered baaad. There's no commandline options to avoid this, right? If not, may I strongly suggest that something like this is added to this years release? Anyways, I tried hacking in the code (I disabled something like this in other open source software before), but I can't seem to locate the place this autoconnect is happening. Could anyone help my find the good entrypoint? -- peace, love & harmony Atte http://atte.dk | http://myspace.com/attejensen http://anagrammer.dk | http://modlys.dk

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ChucK File Size Limit
by Inventor-66＠comcast.net 11 Jun '08

11 Jun '08

Hi, Someone has posted to the ChucK forum with a source code file size limit problem. He is using really huge files and ChucK is crashing. The error message is: > test.ck]:line(3).char(19991): memory exhausted Which we pointed out to him meant he had almost 20,000 characters on one line! So he fixed that and made the file with many shorter lines, and still ran into the problem. Then he looked in the source code and posted this: > In the file src/chuck.tab.c we have a "YYMAXDEPTH 10000" with comments: > > /* YYMAXDEPTH -- maximum size the stacks can grow to (effective only > if the built-in stack extension method is used). > > Do not make this value too large; the results are undefined if > YYSTACK_ALLOC_MAXIMUM < YYSTACK_BYTES (YYMAXDEPTH) > evaluated with infinite-precision integer arithmetic. */ > > I tried changing this constant but managed to pump it upto 15000. Any higher caused problems. What is the problem, can we get around it, and what should I tell this ChucKist? Thanks Les Hall (Inventor)

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Guitar Zero
by Inventor-66＠comcast.net 09 Jun '08

09 Jun '08

Hi, I've written a program inspired by the console game "Guitar Hero" in ChucK. For now it's named "Guitar Zero" unless I think of a better name. Instead of using a special guitar-like controller, it listens to a real guitar/amp via the computer's microphone. The opening screen lets you select parameters and then you get a scoreboard and a fretboard. The program then gives you random notes and detects whether you have played them correctly by using comb filters. So far Guitar Zero is kind of fun and it helps me practice the fretboard. I just got done adding exponentially decreasing time allotment and automatic level increment, but it needs more. I was thinking of adding chords and then possibly whole songs instead of random notes. The thing is, detecting chords might be rather difficult. I could create a chord as an array of notes and have a separate comb filter detecting each note, which is my current plan. Maybe that's the best way to do it. I have the advantage that I know which frequency is the fundamental of each note within a correct chord. So I'm writing partly to share my kewl Guitar Zero program (source posted on the forum), and partly to get your ideas on note and chord detection algorithms. How would you do this task? Thanks, Les Hall (Inventor)

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Crash whit array
by lucas samaruga 08 Jun '08

08 Jun '08

Hi This code produce a crash on linux with chuck-alsa. Maybe the "logic" is not right but the crash exist. class Foo {} fun void appendCap( Foo arr[], int n ) { Foo @ aux[ arr.cap() + n ]; for( int i; i < arr.cap(); i++ ) { arr[i] @=> aux[i]; } aux @=> arr; } Foo @ vars[5]; for( int i; i < vars.cap(); i++ ) <<< vars[i] >>>; appendCap( vars, 5 ); //<<< vars[4] >>>; <<< vars.cap() >>>; <<< "End" >>>; /* this work fine fun Foo[] append( Foo arr[], int n ) { Foo @ aux[ arr.cap() + n ]; for( int i; i < arr.cap(); i++ ) { arr[i] @=> aux[i]; } return aux; } */ Yours Lucas

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Public sporking?
by Kassen 08 Jun '08

08 Jun '08

Dear list, Sporking is fun and we can spork fun's (as long as they are of type "void") but now ( http://electro-music.com/forum/viewtopic.php?t=26805 ) it turns out that we can also spork a public. Considering that ChucKian legend has it "spork" is a slightly dirty word "public sporking" must be downright naughty, especially considering no class is needed. I'm sorry; that was too good to pass up. ========================= //the following will run, not limited in the slightest by trivialities like -say- language specifications. //note there is no class in sight public void foo() { <<<"ping">>>; } spork ~foo(); second => now; ===================== Could somebody comment on this? Is this of any use at all? well, aside from breaking the monotony of code by having synonyms? Confused, Kas.

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Functional Chuck?
by mike clemow 08 Jun '08

08 Jun '08

Hey folks, Anyone else really wish that Chuck supported higher order functions??? check it out. This doesn't work, but i'd love for it to work: // a function that returns an int fun int fn( int n ) { return n + 3; } // a function that takes a function and an array of ints // and returns an array of ints which correspond to the action // of that function on each int in the original array fun int[] mapInt( function fn, int list[] ) { int results[list.cap()]; for( 0 => int i; i < list.cap(); i++ ) { fn( list[i] ) => results[i]; } return results; } [1, 2, 3, 4, 5] @=> input; Add3 add3; mapInt( add3, input ) => int output[]; <<< output[2] >>>; // should print 6 -- I just wish that functions could take other functions as parameters and return functions as their return value. I think that would make sense. Functions, I find are more powerful than classes in Chuck. Also, why is "function" a keyword? cheers, mike -- http://semiotech.org http://deadlylittlepills.com/michael

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list of filenames of a directory
by Renato Fabbri 08 Jun '08

08 Jun '08

Hello ChucK-List, I wonder from time to time how a ChucK script is to access the filenames of a directory. I haven't figured that out still, has someone? thanks, renato

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Bay Area Computer Music Technology Group (BArCMuT) @ Digidesign, Thursday
by Noah Thorp 08 Jun '08

08 Jun '08

Bay Area Computer Music Technology Group (BArCMuT) 7pm Thursday June 12th 2008 @ Digidesign 2001 Junipero Serra Blvd, Daly City , CA 94014 RSVP Here: http://electronicmusic.meetup.com/152/calendar/6921840/ Thank you to Digidesign for hosting our June meetup! Please note that you must RSVP to be admitted to the event at Digidesign: http://electronicmusic.meetup.com/152/calendar/6921840/ The presenters this month will be: * Digidesign project manager and electronic music composer Bobby Lombardi (http://www.digidesign.com) will present on topics in Plug-In design. A video on his recent project, the guitar amp modeling plugin Eleven, can be seen here in the "Behind Eleven" video: http://www.youtube.com/watch?v=nAzyRm0zm_U&feature=user * Rubyist Giles Bowket will present on "Archaeopteryx: A Ruby MIDI Generator". A talk that he gave on this evolving project at the ruby conference GoRuCo is posted here: http://goruco2008.confreaks.com/02_bowkett.html * CNMAT Researcher Andrew Schmeder will present on the micro-OSC project. Micro-osc is Open Sound Control (OSC) running natively on a $25 PIC18F microcontroller board. The firmware itself is scheduled to be released in June. Andy will bring instruments and sensors built on the platform and will also give a quick review the OSC format. More about OSC: http://opensoundcontrol.org/introduction-osc * Lightning talks from 7 - 7:30pm. Adam Murray on Max & jRuby, Ge Wang on the formation of the Laptop Orchestra of the Left, and you? If you would like to give a 5 minute lightning talk on a project you are working on, let me (Noah Thorp) know in advance or at the event. Please RSVP as there will be sign in at the front desk: http://electronicmusic.meetup.com/152/calendar/6921840/ Note, this one is on the second Thursday of the month (June 12th) rather than our usual first Thursday of the month. Also, we are starting at 7pm rather than 7:30 to make room for lightning talks and these excellent presenters. Snacks will be provided. All the best, Noah Thorp Bay Area Computer Music Technology Group (BArCMuT) Organizer

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Yet another joystick...
by Martin Ahnelöv 08 Jun '08

08 Jun '08

Hello ChucKers! This came down the microsound-pipe, and I thought I should share. A modular joystick that doesn't seem to be very comfortable to play games on, but it's probably great as an audio control surface! <http://edimensional.com/product_info.php?cPath=24&products_id=143&osCsid=ed…> <http://benheck.com/> Gasten

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Return values of sporked functions?
by mike clemow 07 Jun '08

07 Jun '08

Hello list, Couldn't find this one in the manual. Where do sporked funcitons return to? How do I get the return value of a spoked function? fun int addThree( int i ) { return i + 3; } spork ~ addThree( 2 ); ...5? cheers, mike -- http://semiotech.org

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sending program change
by Atte André Jensen 06 Jun '08

06 Jun '08

Hi I'm trying to send program change messages from chuck, but fail. I've been looking at stuff like this: https://lists.cs.princeton.edu/pipermail/chuck-users/2007-January/001426.ht… http://www.rattus.net/~packrat/audio/ChucK/files/midisender.ck Using the first URL (a post from Kassen), I try this: 192 => midimessage.data1; 3 => midimessage.data2; bcrMidiOut.send(midimessage); But get "[chuck](via RtMidi): RtMidiOut::sendMessage: event parsing error!". Note: I can send 3 byte messages on the port without problems, I'm thinking it's the 2 byte nature of program change that I doesn't handle correctly. I'm not too much into the deeper working of neither midi messages or what chuck does, so if someone could point me in the right direction, I'd be thankful! -- peace, love & harmony Atte http://atte.dk | http://myspace.com/attejensen http://anagrammer.dk | http://modlys.dk

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CCRMA 2008 Workshops
by Juan-Pablo Caceres 05 Jun '08

05 Jun '08

Hi there! Please see the workshop announcement below and distribute to any interested participants or bulletin boards! Fliers here: CCRMA Workshop General Annoucement: http://ccrma.stanford.edu/workshops/2008/workshopflyer08.pdf Physical Interaction Design Announcement: http://ccrma.stanford.edu/workshops/2008/pid2008-flyer.pdf Thanks! ps. Many apologies for cross postings. ===== CCRMA Summer Workshop for 2008 The Center for Computer Research in Music and Acoustics at Stanford University is happy to announce its offering of intensive programs where top educators and researchers from the fields of music, engineering, and computer science present a detailed study of specialized subjects. The workshops are one or two weeks long. The workshops are open to the public. Each day begins at 9:00 am and ends at 5:00 pm with an hour for lunch on your own. Course tuition and fees will vary by location. Workshops located at CCRMA will be $650 for one week and $1200 for two weeks. Fees may be associated for lab material. July 23 - July 4 Digital Signal Processing: Spectral and Physical Models July 7 - July 18 Physical Interaction Design July 21 - August 1 Music Information Retrieval August 4 - 15 Cell Phone Orchestra August1 8 - 22 Perceptual Audio Coding For more information and online registration on these and other CCRMA workshops, please visit: http://ccrma.stanford.edu/workshops/2008 Contact info: Tricia Schroeter, CCRMA Administrator Stanford University Center for Computer Research in Music and Acoustics, Knoll, Room 301 Stanford, CA 94305-8180 650-723-4971 ext. 320 (office) 650-723-8468 (fax)

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Beat Slicing
by Jonathan Siemasko 05 Jun '08

05 Jun '08

Hello ChucK people, Been following the list for a while now but this is my first post. I am trying to create a Random Chuck Beat slicer. Basically input any loops, set the rate and set the number of slices to use and it will automatically create random breakbeats from it. The problem is when I set the playback rate to anything other then half, single, double, etc. slices stop lining up properly. Debugging messages in the code produce the expected numbers but the audio is clearly not lining up. I have many other features planed but am unable to figure out what is going on here. Is my Math wrong? Is the SndBuf object twitchy? I have only tested it on windows in the miniAudicle so far. -Jonathan 1 => float rate; 8 => int NumOfSlices; SndBuf s => dac; "C:/breaks/amenst.wav" => s.read; s.samples() => s.pos; //Don't Play on Start 0.5 => s.gain; rate => s.rate; (s.samples() / rate) / NumOfSlices => float SliceSize; SliceSize::samp => dur SliceDur; SliceDur - (now % SliceDur) => now; //Sync while(true){ (Std.rand2(0, NumOfSlices - 1) * SliceSize) $ int => int NewPos; NewPos => s.pos; SliceDur => now; }

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a example of thinking on interface mapping
by Kassen 02 Jun '08

02 Jun '08

Dear fellow ChucKists, This weekend I was experimenting some more with my tilt-sensing joypad, adding a -so far crude- granualar way of playing back samples. When I handed it to some friends to try it turned out people subconciously expected something interesting to happen with vigorous shaking. This sounded like a interesting idea so I made crude and so far badly calibrated implementation. What I'm doing is checking the square of the change in bot axis since the last time I polled them and adding both of those to a "shake" variable from which I'm also subtracting a value periodically (at least as long as it's above 0). The resulting parameter seems to do a decent job of detecting whether the joypad is currently being shaken and if so how hard. As hard shaking tends to build up the parameter I have to let it return to 0 faster if it's higher. The result is -so far- being used to scale randomisation in the grain playback rate. This will need tuning (as well as a cleanup...) and I wonder if left-right shaking may need to be diffent from forward-backwards shaking and how important the period of "re-stabilising" of the whole thing is. So; this is still in a early stage, I only started at it last afternoon but it might be the sort of practical example that works for some people as a illustration of how I try to deal with this sort of subject. BTW, I set this sort of thing loose on my friends because I find observing how they interact with it leads to different insights then I'd get on my own, insights that often make interfaces perform bettter for myself as well. Hope that was of any use/interest. Yours, Kas.

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presenting a ChucK thesis + anthem
by Ge Wang 31 May '08

31 May '08

Dear all, We present to you a ChucK PhD thesis: http://www.cs.princeton.edu/~gewang/thesis.html ... and, of significantly higher replay value, Perry's ChucKian anthem: http://www.cs.princeton.edu/~prc/HackChuck.html Hearty and deep thanks to everyone in the ChucK community for your support, ideas, code, guidance, and encouragement so far!!! Also, we'd like note that this marks not an end but a new beginning for ChucK, and that research, development, crashing of ChucK and friends will continue in full - at Princeton, Stanford, and many other places. New features, new bugs, new applications, toolkits, approaches, ideas, improvements to the community development process, and new things we can't begin to predict are on the way! Thank you!! Happy ChucKing and keep on ChucKin'! Yours, Ge! (on behalf of ChucK team)

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Fedora users here?
by Kassen 30 May '08

30 May '08

Dear fellow ChucKists, Is anybody who runs ChucK on Fedora and knows his way around that OS? Some people are having issues building on it and getting the dependencies straight on the forum; http://electro-music.com/forum/viewtopic.php?t=26414 Most of the Linux users there are on Debian-based systems. Particularly the version of G++ needed seems to give issues. If somebody could perhaps help? If it does turn out that the version of G++ needed is critical and non-standard on some popular Linux versions it might be a good idea to make a note of this on the Linux download section and/or the building instructions? That might save future confusion. Confusion is of course great but repeating the same confusion multiple times gets stale. Cheers, Kas.

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Interesting stereo widening effect
by Rich Caloggero 29 May '08

29 May '08

This "algorithm" such as it is came from an old amplifier. I think it was a Carver amp circa 1978. It used all analog circuitry to do the following (never actually heard the beast, but always wanted to implement this to see what it sounded like). Now, thanx to chuck, I have. I'm sure the original implementation didn't have randomly varying delay line lengths! <smile> The idea is that you feed the right channel back to the left inverted and with delay. Do the same to the left. Its supposed to cancel out the "crosstalk" between the channels thus subjectively "widening" the image. Try it with headphones. If you crank up the gain, then you'll hear it better through speakers. Thanx to the person who helped me with the inversion (sorry I forget your name, but you know who you are <smile>). Here's the code: // gain (higher produces more noticable effect) 0.4 => float gain; // whether to invert 1 => int invert; // delay time range 1.0 => float minDelay; 10.0 => float maxDelay; // sound file "music.wav" => string sourceFile; if (me.args()) me.arg(0) => sourceFile; // the patch SndBuf l, r; Step lInverted,rInverted; DelayL dl, dr; l => dac.left; if (invert) l => lInverted => dl => dac.right; else l => dl => dac.right; r => dac.right; if (invert) r => rInverted => dr => dac.left; else r => dr => dac.left; // set initial delay length, gain, and max delay times .2::second => dl.max => dr.max; 4::ms => dur lDelayTime => dur rDelayTime => dl.delay => dr.delay; gain => dl.gain => dr.gain; // load the file sourceFile => l.read; sourceFile => r.read; 1 => r.channel; // start the inverters if (invert) spork ~ inverter(l, lInverted); spork ~ inverter(r, rInverted); // time loop 0 => float whichDelay; while( true ) { .4::second => now; Math.rand2f(0,1) => whichDelay; //<<<whichDelay>>>; if (whichDelay > .5) { Math.rand2f(minDelay,maxDelay) * 1::ms => dl.delay; //<<<"left">>>; } else { Math.rand2f(minDelay,maxDelay) * 1::ms => dr.delay; //<<<"right">>>; } // which channel to affect } // main loop fun void inverter(UGen in, Step out){ while(true){ - in.last() => out.next; 1::samp => now; } }

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