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

Any plans for a "Repository"
by Mike McGonagle 06 Jan '06

06 Jan '06

Hello all, Are there any places where people can share their things they produce using ChucK? It would be interesting to hear what others are doing, and possibly learn and build on what others have done? If this is something that is in the works, would this be something where people would submit an MPEG file, or the ChucK source files? One thing that I have done so far was to "translate" some code for doing "Masks" (ala CMask). Plus, I would be interested in sharing my Fractal Classes (once they are in a more complete state). Thanks, Mike

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question about public class
by michael breitenbach 06 Jan '06

06 Jan '06

hi, why doesnt work the following code (bus error on osx): public class wx5 { static Envelope breath; } wx5.breath => blackhole; i want to use the public class for global control variables. the following does the same as the fragment above - but i have to create a dummy object: public class wx5 { static Envelope breath => blackhole; } wx5 dummy; micha

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Is there plans for something like "include"
by Mike McGonagle 05 Jan '06

05 Jan '06

Hello everyone, I was wondering if there were plans to implement a method for "including" a file in another? Something on the order of C's include, or Java's import? Also, if this is not in the plans, then is there anyone who is using something like either "m4" or C's preprocessor to merge file prior to "feeding" ChucK? Is there a way to "pipe" the preprocessed files into ChucK without having to write that stuff to another file? Basically, I have some objects, that I would like to work with accross several files. and rather than having to explicitly put the code into each file. Thanks, Mike

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How to read large data files
by Mike McGonagle 05 Jan '06

05 Jan '06

Hello all, I recently found ChucK, and have started to work with it in putting together some music. I am trying to use fractal data as a control for various parameters. I rewrote my fractal program in ChucK, but because of how the floats are of limited percision, I am getting different results than the same program written in C. I had thought about two (three?) different approaches to solving the problem, the first would be to use my C program to generate the fractal data, and write it to a file. My program can write this data to an audio file, which would then be imported into ChucK. BUT, it would appear that it is not possible to access the underlying sample data from a 'sndbuf' object. I had looked to see if there was a generic function to read raw data from a disk file, but could not find anything. Also, would this be practical to read, as these datafile can have as many as 20,000 samples per file, these into an Array? How much overhead is there in using an array of floating point values on the order of 20,000 elements? The last idea would be to write a UGEN object in C++, and then recompile ChucK to include this new object. Is there a limitation to how many outputs a UGEN can produce in a single iteration? Several of the fractals that I am working with output more than one value per iteration (each output values represents a different variable in the fractal algorithm). Any suggestions would be appreciated. Thanks.

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off topic: looking for commandline convolution tool
by michael breitenbach 04 Jan '06

04 Jan '06

hi, i'm looking for a simple frequency domain commandline convolution tool (non realtime - osx). (convolution of 2 aiff files) any ideas? micha

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question about input detector from adc (MIC)
by 劉建志 03 Jan '06

03 Jan '06

Dear all, I would like to detect "sound" input from MIC (adc). It means that if any sound occure, one event or anything should be done. My thought is that: adc => gain g => blackhole; 1 => g.gain; g.last() => float x; while( true ) { if ( std.fabs(x) == 1. ) <<<x>>>; } But the x is always 0. So how to do it?? Thanks a lot!! Lewis

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analysis multi-frequency ??
by Lewis Liu 02 Jan '06

02 Jan '06

Dear all, I hope to analysis the frequency of DTMF tone from input (adc). Could you have any idea or suggestion or reference for this in chuck programming?? Thanks a lot!! Best Regards Lewis Best Regards Lewis

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fun dur GetT() rises to invalid type
by eduard 18 Dec '05

18 Dec '05

Hi there, I have a osc meta-instrument wich has a function to get the unit_time to advance. Something like: public class oscInstrument { // some members here // .... fun dur GetT(){ return T_}; } It compiles fine, but when used in the following manner: oscInstrument myInstrument; while(true) { //do_something //... noteDuration::myInstrument.GetT() => now } it rises the following error: invalid type 'oscInstrument' in postfix of dur expression... (must be of type 'dur') . However if I do the following: dur T; while(true) { //do_something myInstrument.GetT() => T; noteDuration::T=> now } everything works fine. Any ideas? Thanks, Eduard

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sinosc and phase_offset
by michael breitenbach 18 Dec '05

18 Dec '05

hi, this code: 60 => std.mtof => float freq; sinosc m1 => sinosc c1 => dac; freq => m1.sfreq; freq => c1.sfreq; while (1) { m1.last() => c1.phase_offset; 1::samp => now; } causes this error: operation failed (sorry)...(reason: line(10): class 'sinosc' has no member 'phase_offset') why??? - in the doc is a input for phase_offset in sinosc micha

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performance under linux
by Atte André Jensen 18 Dec '05

18 Dec '05

Hi I retested my midi setup stuff (http://www.atte.dk/midi.tgz) with the latest/greatest under linux, and there seems to be a quite large latency. About maybe 100ms at least way too large to be playable. However it seems that cpu usage is more relazed. Am I wrong in expecting improvements in the new release under linux, or am I missing something? Looking forward to any response... -- peace, love & harmony Atte http://www.atte.dk

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sporking member functions
by Atte André Jensen 18 Dec '05

18 Dec '05

Hi I tried the attached old (in other aspects not-working) code in the latest/greatest, but it seems that sporking a member function is still causing an exception. Am I right? Any plans on changing this? -- peace, love & harmony Atte http://www.atte.dk

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make linux-jack fails
by Atte André Jensen 17 Dec '05

17 Dec '05

Hi Just grabbed the latest/greatest, but make linux-jack fails: [atte@aarhus src]$ make linux-jack make -f makefile.jack make[1]: Entering directory `/data/atte/software/chuck/chuck-1.2.0.4/src' bison -dv -b chuck chuck.y gcc -D__LINUX_JACK__ -O3 -c -D__CK_SNDFILE_NATIVE__ chuck.tab.c flex -ochuck.yy.c chuck.lex gcc -D__LINUX_JACK__ -O3 -c -D__CK_SNDFILE_NATIVE__ chuck.yy.c gcc -D__LINUX_JACK__ -O3 -c -D__CK_SNDFILE_NATIVE__ chuck_absyn.cpp gcc -D__LINUX_JACK__ -O3 -c -D__CK_SNDFILE_NATIVE__ chuck_parse.cpp gcc -D__LINUX_JACK__ -O3 -c -D__CK_SNDFILE_NATIVE__ chuck_errmsg.cpp gcc -D__LINUX_JACK__ -O3 -c -D__CK_SNDFILE_NATIVE__ chuck_frame.cpp gcc -D__LINUX_JACK__ -O3 -c -D__CK_SNDFILE_NATIVE__ chuck_symbol.cpp gcc -D__LINUX_JACK__ -O3 -c -D__CK_SNDFILE_NATIVE__ chuck_table.cpp gcc -D__LINUX_JACK__ -O3 -c -D__CK_SNDFILE_NATIVE__ chuck_utils.cpp gcc -D__LINUX_JACK__ -O3 -c -D__CK_SNDFILE_NATIVE__ chuck_vm.cpp gcc -D__LINUX_JACK__ -O3 -c -D__CK_SNDFILE_NATIVE__ chuck_instr.cpp gcc -D__LINUX_JACK__ -O3 -c -D__CK_SNDFILE_NATIVE__ chuck_scan.cpp gcc -D__LINUX_JACK__ -O3 -c -D__CK_SNDFILE_NATIVE__ chuck_type.cpp gcc -D__LINUX_JACK__ -O3 -c -D__CK_SNDFILE_NATIVE__ chuck_emit.cpp gcc -D__LINUX_JACK__ -O3 -c -D__CK_SNDFILE_NATIVE__ chuck_compile.cpp gcc -D__LINUX_JACK__ -O3 -c -D__CK_SNDFILE_NATIVE__ chuck_dl.cpp gcc -D__LINUX_JACK__ -O3 -c -D__CK_SNDFILE_NATIVE__ chuck_oo.cpp gcc -D__LINUX_JACK__ -O3 -c -D__CK_SNDFILE_NATIVE__ chuck_lang.cpp gcc -D__LINUX_JACK__ -O3 -c -D__CK_SNDFILE_NATIVE__ chuck_ugen.cpp gcc -D__LINUX_JACK__ -O3 -c -D__CK_SNDFILE_NATIVE__ chuck_main.cpp gcc -D__LINUX_JACK__ -O3 -c -D__CK_SNDFILE_NATIVE__ chuck_otf.cpp gcc -D__LINUX_JACK__ -O3 -c -D__CK_SNDFILE_NATIVE__ chuck_stats.cpp gcc -D__LINUX_JACK__ -O3 -c -D__CK_SNDFILE_NATIVE__ chuck_bbq.cpp gcc -D__LINUX_JACK__ -O3 -c -D__CK_SNDFILE_NATIVE__ chuck_shell.cpp gcc -D__LINUX_JACK__ -O3 -c -D__CK_SNDFILE_NATIVE__ chuck_console.cpp gcc -D__LINUX_JACK__ -O3 -c -D__CK_SNDFILE_NATIVE__ digiio_rtaudio.cpp gcc -D__LINUX_JACK__ -O3 -c -D__CK_SNDFILE_NATIVE__ midiio_rtmidi.cpp gcc -D__LINUX_JACK__ -O3 -c -D__CK_SNDFILE_NATIVE__ rtaudio.cpp rtaudio.cpp: In function 'int jackCallbackHandler(jack_nframes_t, void*)': rtaudio.cpp:2868: error: expected `;' before ':' token make[1]: *** [rtaudio.o] Error 1 make[1]: Leaving directory `/data/atte/software/chuck/chuck-1.2.0.4/src' make: [linux-jack] Error 2 (ignored) However make linux-alsa seems to work, so at least I have something to try out, but if comeone could help me with the jack stuff, I'd really appreciate it... -- peace, love & harmony Atte http://www.atte.dk

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Re: 2 questions (Adam Tindale)
by michael breitenbach 16 Dec '05

16 Dec '05

hi, this: sinosc a => dac; a.last => float x; was also my first idea - but it doesnt work. a error occurs: cannot resolve operator '=>' on types '[function]' and 'float'... (i have installed chuck 1.2.0.4.) micha

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icons for upcoming Chuck IDE?
by Spencer Salazar 16 Dec '05

16 Dec '05

Hello, I have been working on a free GPLed integrated development environment ("IDE") program designed specifically for development in ChucK, called miniAudicle. It is planned to be released for Mac OS X, Win32, and Linux. I was hoping to design some pretty-looking icons to represent the "add," "remove," "replace," "remove all," and "remove last" on-the-fly programming commands within the miniAudicle. Unfortunately, my graphic design skills leave much to be desired. So i ask of the ChucK community at large: would anybody like to contribute their icon design talents for use within the miniAudicle? The only characteristics im really looking for are that the icons be 48x48 pixels or larger, that they have a transparent background, and that, to some degree, they can be intuitively associated with the corresponding ChucK OTF commands. Here is a screenshot of the icons currently in use: http:// www.princeton.edu/~ssalazar/miniaudicle.png they work well enough, but they were designed for a web browser, so some of the icons dont really match up as well with the corresponding functionality as they could. Also, due to some licensing issues im not sure if I would be able to distribute them in any case. please let me know if youd be willing to help with this. also if anyone has any pointers to any good repositories of decent looking icons which could be easily used in this project, that would also be very helpful and probably involve less redundant labor. thanks spencer

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Re: [chuck-users] Segmentation fault
by Ollie Glass 16 Dec '05

16 Dec '05

Hi Ge, >> Sometimes I get a segmentation fault when loading a new sample >> into a sample buffer that's already playing. Sometimes it doesn't >> seem to cause a problem. Is there anything I can do to prevent >> these crashes? > > We just checked in a fix for sndbuf.read which now correctly > (hopefully) closes the file handles (which it wasn't doing) and > also resets a state variable. It is now in CVS, and will be part > of 1.2.0.4, which should be released by tomorrow. Please let us > know if this indeed remedies the problem. Also, which platform is > this crash on? Yes, 1.2.0.4 fixes the problem. I am on OS X 10.4.3. Thank you, Ollie

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warning: the use of 'tmpnam' is dangerous, better use 'mkstemp'
by Tyler Gillies 15 Dec '05

15 Dec '05

chuckas, Just built and tested 1.2.0.4 on linux-alsa. Work great (BLITs! Yes!). When I built, I was given this message: warning: the use of 'tmpnam' is dangerous, better use 'mkstemp' dangerous?? - Tyler Gillies

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2 questions
by michael breitenbach 15 Dec '05

15 Dec '05

hi, 1. is it possible to create a event from a audiosignal (for example a pulse force a event)? 2. and is it possible to use a audiosignal as a float value in chuck code - like a snapshot function? sinosc a => float x => dac; // this doesn't work micha

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chuck manual
by James Baker 13 Dec '05

13 Dec '05

hey chuckers, i just spent a bit of time looking through the wip manual pdf and ive got to say im impressed. this thing is far superior than most ive seen - commercial or free. its things like this that imho will make chuck stand out. keep up the good work, james ps. its almost christmas, wheres audicle + the toys ? ;)

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Segmentation fault
by Ollie Glaskovik 12 Dec '05

12 Dec '05

Sometimes I get a segmentation fault when loading a new sample into a sample buffer that's already playing. Sometimes it doesn't seem to cause a problem. Is there anything I can do to prevent these crashes? Thanks, Ollie

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ffmup chuck duet video + new power toys
by Ge Wang 06 Dec '05

06 Dec '05

Greetings, Perry and I rendered another chuck performance/disaster last night as part of FFMUp in Princeton. Perry played the VOMID (Voice-Oriented Melodica Interface Device) [1] and projected the sound through the amazing Noggin-phonics speaker head (also a PRC production), while I programmed on-the-fly: http://soundlab.cs.princeton.edu/listen/chuck@ffmup-2005.11.29.mov The breath pressure sensor, joystick, sliders, and linear FSR 1 on the VOMID controlled a live vocal model in chuck; the consonants (and belching) were sound clips, played by the keys and linear FSR 2 - all projected through metal head + mounted speakers of the Noggin-phonics! (The wild spatializing effect of this is unfortunately lost in the video.) Another notable aspect of the ordeal was the debut of two new chuck things, soon to be released. Both are authored by Spencer Salazar, a most righteous programmer and CS major here at Princeton. The ChucK Shell is a built-in command line interface *within* chuck, from which on-the-fly programming commands (and even live code) can be issued with great efficiency. The other is a prototypical native ChucK editor (called the miniAudicle, using Cocoa on OSX, Win32/MFC on Windows, and we-haven't-decided-what on linux). This will be released along with the Audicle, to add to our arsenal of chuck power toys. We will be hearing more about both the shell and the miniAudicle very soon (they are still in intense development)... So a big thanks to Spencer, and to Scott Smallwood for setting everything up for FFMUP. Best, Perry + Ge! --- Read more about the VOMID here: [1] http://hct.ece.ubc.ca/nime/2005/proc/nime2005_236.pdf

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sndbuf.pos
by eduard 04 Dec '05

04 Dec '05

Hello all, I have a question for whoever is willing to answer it. Has one to always set sndbuf.pos at each iteration? My scenario: Let's say I want to control the starting position of my sndbuf with a midi keyboard while sndbuf is set to loop mode ( 1 => sndbuf.loop ). Midi is received in a sporked MidiReceive() function and my sndbuf.pos is set inside this same function and not in the main while- loop. Thus when I press a key the sndbuf.pos is changed for that loop, but when it gets to the end of it, it starts at sndbuf.pos(0) instead of the previously set one. So it seems that sndbuf doesn't keep track of the position that was set, and automatically starts from the beginning when the end of the audiofile is reached. Is this true? Thanks, Eduard

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sndbuf.pos
by eduard 04 Dec '05

04 Dec '05

ok, I think i got the answer. Sorry, but when one gets obsessed by something he becomes blind. sndbuf.pos it's just the current position in the buffer and it is obviously changing all the time.

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Re: [chuck-users] The ChucK Manual prerelease
by Felix Meinhold 02 Dec '05

02 Dec '05

Hi, > Do you have cvs access? You should be able to do an anonymous cvs checkout and > grab all of the code. If that doesn't work for you then I am more than happy to > host a tarred up version somewhere for people to check out. > > Here is how to do it: On Linux (or maybe on ArchLinux only) you have to tell cvs what remote shell to use for :ext: export CVS_RSH=ssh; cvs -d :ext:anon-chuck at cvs.cs.princeton.edu:/cvs checkout chuck_dev (export works with bash/zsh) felix

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The Freesound Project
by Nelson Ferraz 02 Dec '05

02 Dec '05

Interesting project: The Freesound Project aims to create a huge collaborative database of audio snippets, samples, recordings, bleeps, ... released under the Creative Commons Sampling Plus License. The Freesound Project provides new and interesting ways of accessing these samples, allowing users to * browse the sounds in new ways using keywords, a "sounds-like" type of browsing and more * up and download sounds to and from the database, under the same creative commons license * interact with fellow sound-artists! We also aim to create an open database of sounds that can also be used for scientific research. Many audio research institutions have trouble finding correctly licensed audio to test their algorithms. Many have voiced this problem, but so far there hasn't been a solution. http://freesound.iua.upf.edu/

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performance of chuck
by Atte André Jensen 30 Nov '05

30 Nov '05

Hi I've made a working version of the midi setup I've been rambling about. Now that I make som reak music with the setup I've made a few new observations. Most problematic is the fact that chuck often (well not often, but sometimes) click and pops, esp at noteons, but also other places. I guess I have to see if I can reduce the code run at noteon time, right? But besides that is there any general approaches for making chuck run more smoothly? Just as anoying is the fact that if I punish chuck with too many notes she breaks up the audio. That's just the way it is and I can live with that. But the problem is that after such an incident timing seems to be very sloppy. I could post some examples if someone care to look at them. I'm sure my code can be optimized quite a bit. But I guess the above is still valid since optimized code will behave similar if pressed hard enough. As a final remark at least the following code is totally un-elegant (I have a feeling Chorus is not the cheapest UGen around), but I can't figure out how to envelopes on a stereo signal (and Chorus is mono anyways, or?): sinosc s1 => ADSR env => pan2 pan; sinosc s2 => Chorus chor_l => ADSR env_l => pan.left; sinosc s3 => Chorus chor_r => ADSR env_r => pan.right; pan => dac NB: Still under linux/debian/unstable with realtime kernel from demudi. NB2: With csound I was able to enhance performance by running in a virtual terminal without X. But with chuck, that doesn't semm to make much difference. Neither does running as root. Neither does running with nice -19 and killing a few daemons.... -- peace, love & harmony Atte http://www.atte.dk

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