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Is this possible?
by Mike McGonagle 13 Feb '06

13 Feb '06

Hello all, As ChucK is intended to be an "on the fly" tool for sound generation, I was wondering if it would be possible if the compiler could detect infinite loops that DO NOT advance time. I am thinking about this more from a practical stand point that when some new code is being added to ChucK, if a loop is entered that does not advance time, nor yeild control to another thread, it will SEIZE the machine, with the only recourse is rebooting. While this is practical, I know that it would be one of those feature requests that would be low priority. I only make the recommendation because over the weekend, I was playing with ChucK and ran accross this very problem. I would think that in performance, it would not really be practical to have to reboot. At the same time, I wonder how many performances would rely on entering raw code, instead of loading files. Thanks, Mike

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sndbuf.ck not doing any sound
by Charlls Quarra 13 Feb '06

13 Feb '06

Hi, apparently there is some sort of problem with sndbuf in 1.2.0.4, the sndbuf.ck works ok with some .aif generated with stk, but a .wav generated from ardour won't produce any sound. the .wav information is ======= WAVE Format ======= Format Tag: 3 (0x3) Channels: 1 Samplerate: 48000 avg byte/sec: 192000 Block align: 4 bits/sample: 32 cbSize: 0 This is compiled with makefile.jack, which apparently by defaults links against any libsndfile present in the system, indeed chuck is linked against it; $ ldd /usr/bin/chuck linux-gate.so.1 => (0xffffe000) libasound.so.2 => /usr/lib/libasound.so.2 (0xb7e45000) libjack.so.0 => /usr/lib/libjack.so.0 (0xb7e3a000) libstdc++.so.5 => /usr/lib/gcc-lib/i686-pc-linux-gnu/3.3.5-20050130/libstdc++.so.5 (0xb7d80000) libdl.so.2 => /lib/libdl.so.2 (0xb7d7c000) libm.so.6 => /lib/libm.so.6 (0xb7d59000) libsndfile.so.1 => /usr/lib/libsndfile.so.1 (0xb7d08000) libc.so.6 => /lib/libc.so.6 (0xb7bf0000) libpthread.so.0 => /lib/libpthread.so.0 (0xb7b9e000) libgcc_s.so.1 => /usr/lib/gcc-lib/i686-pc-linux-gnu/3.3.5-20050130/libgcc_s.so.1 (0xb7b96000) /lib/ld-linux.so.2 (0xb7f08000) --------------------------------- 1GB gratis, Antivirus y Antispam Correo Yahoo!, el mejor correo web del mundo Abrí tu cuenta aquí

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multi-channel dac/adc?
by Charlls Quarra 10 Feb '06

10 Feb '06

Hi, I wonder if it is possible to manage input and output of audio hardware with more than 2 channels, this relates to a secondary doubt it's tickling me; why there seems to be a embedded version of stk inside chuck source, instead of relying on stk as a external dependency? Currently stk 4.2.1 supports any number of audio I/O channels, it's possible to easily update chuck to support the new stk? or even cleaner, move stk as a external dependency? p.d: for gentooers, there are now two (preliminary, they work on my x86 box tho) ebuilds for stk and chuck; http://bugs.gentoo.org/show_bug.cgi?id=122321 http://bugs.gentoo.org/show_bug.cgi?id=122332 just put them in a sensible overlay path (i use /usr/local/portage-audio/media-libs/stk and /usr/local/portage-audio/media-sound/chuck) --------------------------------- 1GB gratis, Antivirus y Antispam Correo Yahoo!, el mejor correo web del mundo Abrí tu cuenta aquí

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example use of Modulate Ugen
by Graham Coleman 09 Feb '06

09 Feb '06

ChucK rockers, Hi list! I'm Graham. I like ChucK. Can someone give a working example of the Modulate Ugen? I hooked it up in the output of an STK instrument, but got no noise. Is it something you must poll for values, perhaps? Here's my unsuccessful try: -- Scale sc; //this is some utility code Wurley w => Modulate m => dac; m.vibratoGain( 0.5 ); m.randomGain( 0.5 ); m.vibratoRate( 1.0 ); int i,j; [0, 1, 2, 4, 5, 1, 2, 4, 3] @=> int mel[]; [1, 1, 3, 2, 1, 1, 2, 1, 1] @=> int dur[]; for (0=>int i; ; i++) { i%mel.cap() => int ind; sc.scaleFreq( mel[ind]+2, sc.mixo, 4, 0 ) => w.freq; w.noteOn( 0.4 ); 250::ms => now; } -- I'm running with the latest audicle and chuck on WinXP. best, Graham

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Feature request
by Mike McGonagle 08 Feb '06

08 Feb '06

Hello Ge, I was wondering if it would be possible to include some method of determining if a function returns 'nan'? In working with fractals, some of the results that I get during a search for a new parameter set may produce a 'nan' value, but there seems to be no way of testing for that condition. As a result of this, several classes of fractals that I am working on don't complete a search because I can't test for this. I was thinking how this might go, and there were basically two forms that could work... // static constant if (result == math.nan) { doSomethingWith(result); } else { reportError(result); } or // a function call if ((result) => math.isNan) { ... Thanks, Mike

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Question on Class and Inheritance
by Mike McGonagle 07 Feb '06

07 Feb '06

/* This one was a doozey... it took me about 2 hours to figure out this one, as I had rewritten some code, not thinking this could be the trouble... Anyway, it would appear Chuck doesn't differentiate between floats and arrays of floats when finding the proper function to call. I would think that this code would produce an output with a call to the B1, but when run, it actually calls the E1. Does ChucK treat floats and arrays of float the same when making this function determination? Well, yes it does, but should it? I would think, that if object oriented is a goal, then floats and arrays of floats would be treated differently. */ class B1 { fun void f(float f[]) { <<< "in B1.f", "" >>>; } } class E1 extends B1 { fun void f(float x, float y, float z) { <<< "in E1.f", "" >>>; } } class B2 { fun void f(float x, float y, float z) { <<< "in B2.f", "" >>>; } } class E2 extends B2 { fun void f(float f[]) { <<< "in E2.f", "" >>>; } } B1 b1; B2 b2; E1 e1; E2 e2; [ 0.1, 0.3, 0.7 ] @=> float myArray[]; b1.f(myArray); // in B1.f - correct e1.f(myArray); // in E1.f - wrong - should this actually call B1.f(myArray) e1.f(0.7, .553, 77); // in E1.f - correct b2.f(0.7, .553, 77); // in B2.f - correct e2.f(0.7, .553, 77); // in E2.f - wrong - should this actually call B2.f(0.7, .553, 77) e2.f(myArray); // in E2.f - correct //******* The following Java program illustrates what I was thinking should happen. Will ChucK follow what Java is doing? class Base1 { public String f(double x[]) { return "Base1"; } } class Ext1 extends Base1 { public String f(double x, double y) { return "Ext1"; } } class Base2 { public String f(double x, double y) { return "Base2"; } } class Ext2 extends Base2 { public String f(double x[]) { return "Ext2"; } } public class doit { public static void main(String[] args) { Base1 b1 = new Base1(); Ext1 e1 = new Ext1(); Base2 b2 = new Base2(); Ext2 e2 = new Ext2(); double myArray[] = { 0.7, .533, 75 }; System.out.println("b1: " + b1.f(myArray)); // b1: Base1 System.out.println("e1: " + e1.f(myArray)); // e1: Base1 System.out.println("e1: " + e1.f(0, 1)); // e1: Ext1 System.out.println("b2: " + b2.f(0, 1)); // b2: Base2 System.out.println("e2: " + e2.f(0, 1)); // e2: Base2 System.out.println("e2: " + e2.f(myArray)); // e2: Ext2 } } Thanks, Mike

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Question regarding Sample level timing.
by Mike McGonagle 06 Feb '06

06 Feb '06

Hello all, I wrote this test this morning, and something seems amiss here with timing. Or am I understanding this wrong? /* The following code doesn't seem to work properly, as there appears to be a 2 sample delay from when the impulse is triggered from what is expected. as the 'doit' function is started at time 0.0, I would think that each and every impulse would be generated at 100::ms intervals, starting at 0.0, and not 2.0 The code generates the output below... */ impulse i => blackhole; fun void doit() { while(true) { 1.0 => i.next; 100::ms => now; } } now + 1::second => time later; spork ~ doit(); while(now < later) { i.last() => float val; if (val != 0.0) { <<< now, i.last() >>>; } 1::samp => now; } /* 2.000000 1.000000 4412.000000 1.000000 8822.000000 1.000000 13232.000000 1.000000 17642.000000 1.000000 22052.000000 1.000000 26462.000000 1.000000 30872.000000 1.000000 35282.000000 1.000000 39692.000000 1.000000 */ Thanks, Mike

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Release schedule for 1.2.0.5
by Mike McGonagle 06 Feb '06

06 Feb '06

Hello Ge, Thanks for looking into the impulse bug so quickly. I was wondering if the development team has a regular schedule under which you are working? I was just curious at how often there will be updated releases for ChucK are being made. Thanks, Mike

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redirecting console output
by eduard 28 Jan '06

28 Jan '06

Hello all, Is there a way to redirect the std output to a text file? I'd like to use chuck to annotate songs, i.e. when I hear a kick a press a midi keyboard and I tell chuck to output the elapsed time to the console. I'd like to write this output to a text file, but I haven't succeed. Could some one give me a hint? and if that hint is unix or c/c++ it'd be better. thanks in advance, Eduard

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sndbuf questions, etc.
by eric.forte＠verizon.net 26 Jan '06

26 Jan '06

Hi all. Is there a way to make a table lookup oscillator with ChucK? I'm trying to load in soundfiles to be used as waveforms so that I can index them directly. I've worked through allocating an array and loading it with the samples of a file, but there doesn't seem to be a way that you can actually put them out to the dac again. Then I tried to do some other tests where I just read the file into an array outside of a function (since that seemed a bit more chuckian), then sporked a bunch of shreds, but it seems that when you change the position of the buffer from inside a function, it seems to affect the position in the other shreds. The last test I did, I had the file read in inside of the function and that seemed to work well, but quickly seemed to slow everything down. Any input is appreciated. Regards, Eric

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