November 2008 - chuck-users - lists.cs.princeton.edu

64-bit chuck
by Roger Critchlow 10 Nov '08

10 Nov '08

Greetings Chuckists -- This looks like a lot of fun, but I have one axe to grind. I see that the question of 64-bit chuck came up on the mailing list 2 years ago and after reviewing the code I can see why nothing has happened since. It's a little unfriendly to be so coy about this. You're very careful to discourage Mac and Windows users from attempting to recompile from sources. But someone who's trying to compile on a 64-bit operating system gets no warnings, no cautions, no under construction signs, nothing from the download and build web pages to indicate any problems at all. If you look through the information files of the downloaded sources for indications of 64-bit problems, you find: VERSIONS: - corrected more issues on some 64-bit systems VERSIONS: - corrected issues on some 64-bit systems Until you get around to fixing it, could you at least mention somewhere on the web pages or in the information files that your code truncates 64 bit pointers to 32 bits before dereferencing them so we can stop figuring it out the hard way? Please? Thanks, -- rec --

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yet another lisa bug?
by eduard aylon 09 Nov '08

09 Nov '08

Hi Dan and others, I don't think this is the expected behaviour for lisa: when duration is set, the number of maxVoices is reset to 10, the default. Please, check attached patch. eduard LiSa lisa; lisa.maxVoices(100); <<<lisa.maxVoices()>>>; lisa.duration( 1::second); <<<lisa.maxVoices()>>>;

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division by zero bug
by eduard aylon 09 Nov '08

09 Nov '08

Hi, the following code does not crash nor throw any exceptions: 0 => float z; 2::second => dur n; n/z => dur k; // division by zero!! while(true) { k => now; } althought it does throw a floating point exception when types are ints, it doesn't when types are floats or time based. Well, at least on my system: OS X Leopard. eduard

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MiniAudicle CVS (Mac OS X)
by Juan-Pablo Caceres 09 Nov '08

09 Nov '08

Hi everyone, Which is the latest stable CVS (or SVN) of miniAudicle/Chuck for OS X? I didn't have luck googling (sorry if this has been asked before). The latest release of miniAudicle is version 0.1.3.9 (with ChucK: version 1.2.1.2 (dracula)) Both are fairly old (more that a year as far as I can tell), so I'd love to get the latest version. Thanks! Juan-Pablo

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LiSa .rate() issue (bug)
by Kassen 09 Nov '08

09 Nov '08

Dear list (especially Dan), I just spend a hour or so pulling my hair out wondering why my little toy turntable wouldn't "scratch" anymore. It turns out that the issue is some changed behaviour in LiSa's .rate(). I believe .rate() no longer automatically casts integers to floats while previously it did. The following example demonstrates the issue; //============8<================= LiSa l => dac; second => l.duration; //just making sure <<<l.rate(), " default rate">>>; //note this is a integer -1 => l.rate; <<<l.rate(), " should be -1 but isn't">>>; -1.0 => l.rate; <<<l.rate(), " should be -1">>>; //============8<================= I'm not sure how this can happen as casting integers to floats is supposed to be automatic in ChucK. If somebody could please look into this? Yours, Kas.

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help understanding lisa
by eduard aylon 06 Nov '08

06 Nov '08

Hello list, I am trying to build a granular patch with lisa, but for some reason I am getting clicks every time lisa repeats the buffer. Maybe it has to do with lisa's duration? Hope someone can explain me what I am doing wrong. Following I attach two examples one uses lisa the other uses an array. The one that runs with lisa has clicks, the other sounds pristine, why? (even if rampup and rampdown were set for lisa). The strange thing is that if recorded to file and checked with an audio editor I can't see any strange artifacts in the waveform. thanks for any help, eduard // the patch that uses lisa: LiSa lisa => dac; 1024 => int size; size::samp => lisa.duration; for (int i; i < size; i++) { lisa.valueAt(Math.sin(2.0*pi*60*i/size), i::samp); } 1 => lisa.play; while(true) { lisa.rampUp(10::samp); lisa.duration() - 20::samp => now; lisa.rampDown(10::samp); } // the other patch with a simple buffer: Impulse imp => dac; 1024 => int size; float buffer[size]; size - 1 => int bitmask; for (int i; i < size; i++) { Math.sin(2.0*pi*60*i/size) => buffer[i]; } 0 => int pos; while(true) { buffer[pos&bitmask] => imp.next; pos++; 1::samp => now; }

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faust2ck: Use FAUST to generate ChucK UGens
by Stephen Sinclair 02 Nov '08

02 Nov '08

Hi all, In an attempt to one-up myself on the tutorial and make it even easier to make new UGens, I've written a little script to help interface between FAUST and the ChucK code base. Check it out: http://www.music.mcgill.ca/~sinclair/content/blog/faust2ck_a_faust_wrapper-… (I tried putting it on the ChucK wiki but it didn't seem to want me to upload files, so it's hosted on my personal site for now.) Steve

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