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

getting ADSR::XTime()
by eduard 17 Jul '08

17 Jul '08

Hi list, I'm afraid there is a bug on the getters side of the ADSR UGen. One can set adsr::attackTime( 10::ms ) and gets adsr::attackTime() as 0.010::samp, instead of (0.010*SR)::samp. So, to be able to use adsr::attackTime() => now correctly, one should do: adsr::attackTime()*sr => now Which I don't think is the way one would expect. Could anyone confirm the same behaviour, so I can add it to the wiki-bug-list? eduard SinOsc s => ADSR env => Gain g => dac; env.attackTime( 10::ms ); env.decayTime( 5::ms ); env.releaseTime( 1000::ms ); <<<"env_region", "\tstate()", "\tcur time[ms]", "\ttime[samp]", "\ttime[ms]">>>; <<<"-------------------------------------------------------------------- -------","\n">>>; while( true ) { env.keyOn(); <<< "start of att", "\t", env.state(), "\t", now/ms , "\t", env.attackTime()/samp, "\t", env.attackTime()/ms>>>; env.attackTime() => now; <<< "end of att", "\t", env.state(), "\t", now/ms >>>; <<< "start of dcy", "\t", env.state(), "\t", now/ms, "\t", env.decayTime()/samp, "\t", env.decayTime()/ms >>>; env.decayTime() => now; <<< "end of dcy", "\t", env.state(), "\t", now/ms >>>; env.keyOff(); <<< "start release", "\t", env.state(), "\t", now/ms, "\t", env.releaseTime()/samp, "\t", env.releaseTime()/ms >>>; env.releaseTime() => now; <<<"end release", "\t", env.state(), "\t", now/ms >>>; 1::second => now; <<< "\n","******************\n">>>;

4 5

osc to keyboard
by Alpha Core 19 May '08

19 May '08

hello Ive been working on triggering Osc by the use of the keyboard and im still a having trouble I read the kb.ck file in the hid folder to figure out how it triggered and output the keys so i came up with the below syntax. // setting up the keyboard to trigger Osc // this should trigger a middle c tone when A key is pressed { if (msg.is ButtonDown()) and if (msg.my_keynumber = 65 then SinOsc s => Dac; 261 => s.freq; 1::second => now } it still giving me errors ? even when i running the kb.ck file in chuck any help would be great thanks Gabriel --------------------------------- Be a better pen pal. Text or chat with friends inside Yahoo! Mail. See how.

11 21

delay times of STK delays seem to be 1 sample off?
by volker böhm 03 Mar '08

03 Mar '08

hi, i was running some simple tests to hear the difference between allpass vs linear interpolating delay lines when i noticed that there is obviously a little bug in how the delay time is calculated in the delay UGens from STK. the following example feeds an impulse into a DelayA with high feedback and compares the tuning to a TriOsc. can't i trust my ears or is the tuning only correct if i add 1 to deltime before calculating the frequency for TriOsc? thanks, volker. Impulse imp => Gain out => dac; out => DelayA delay => out; TriOsc tri => dac; // test oscillator 44100.0 => float sr; // sampling rate // delay time in samples 150.5 => float deltime; deltime::samp => delay.delay; // calc tri freq from delay time // have to add 1 to deltime to get correct tuning sr / (deltime) => tri.freq; // set feedback level 0.999 => delay.gain; 0.3 => tri.gain; while(true) { 1 => imp.next; 6::second => now; }

3 9

Scite script for Chuck
by AlgoMantra 26 Feb '08

26 Feb '08

Hi there - another question which will show you how little I know about linux (or any kind of) machines. I use Scite as my script editor on Ubuntu Gutsy (Linux/Debian), and I need a syntax highlighter for Chuck stuff. The wiki suggests that I use this python script as my IDE: http://wiki.cs.princeton.edu/index.php/Smallest_ChucK_IDE_Ever Now my question is...which directory do I put this .py script in to run? I mean, i've noticed that Chuck files can only be thrown in the VM from a terminal which is in that directory that contains the .ck file being chucked? And I often need to switch directories to access different files. Or can this .py run in some kind of global manner? -- ------- -.- 1/f ))) --. ------- ... http://www.algomantra.com

5 15

vim highlights for Chuck
by AlgoMantra 23 Feb '08

23 Feb '08

On Tue, Feb 12, 2008 at 1:56 PM, AlgoMantra <algomantra(a)gmail.com> wrote: > > > On Sat, Feb 9, 2008 at 3:59 PM, Martin Ahnelöv <operagasten(a)gmail.com> > wrote: > > > lör 2008-02-09 klockan 09:00 +0530 skrev AlgoMantra: > > > There is syntax-highlighting for vim on the wiki, and I have > > > made some > > > commands to operate the VM from inside Vim. > > > > Right, yes, sorry 'bout that. You need to create the files/directories > > you miss. > > > > Okay, I have made the modifications as suggestion (syntax folder > where you put the ck.vim file, and the filetype.vim file) but > when I run $vim filename.ck I see no highlighting. Is there > something else I need to do to use this functionality? > hey gang, this issue is still unresolved for me. can someone please help get this issue sorted so I can actually start chucking? -- ------- -.- 1/f ))) --. ------- ... http://www.algomantra.com

4 10

windows and under privileged users
by Jeremy Hunt 20 Feb '08

20 Feb '08

Hi All, I am trying to use ChucK to teach a digital audio synthesis class. The class is taught in a PC lab with winxp (I have little experience with winxp). My question, is it possible to run chuck --loop from under privileged accounts? My tests end up crashing chuck (same with miniAudicle) when I chuck + foo.ck to a looped chuck. What protocol does chuck use to communicate from one terminal to the next when using --loop? Any help on steps to get this running would be much appreciated. -jrmy

3 3

assignment of integers?
by Kassen 19 Feb '08

19 Feb '08

Fellow ChucKists, consider; ---------------------------- int foo @=> int bar; //yields semi-random high number <<<bar>>>; ----------------------- and; ----------------------- 1 => int foo @=> int bar; //yields "1" <<<bar>>>; 2 => foo; //yields "1" <<<bar>>>; ------------------------------ Integers seem to be in some sort of state of doubt between being assignable and not being assignable (maybe also in doubt about being a object? the poor things!). This becomes somewhat important if bar is a member of a class that -for it's member functions- would benefit from knowing what happens around it. I can still turn both foo and bar into length 1 arrays or keep passing foo as a argument to such functions but that's not as pretty. Yours, Kas. PS for those who hadn't seen this yet; length 1 arrays to trick integers into becoming full objects was cooked up by Frostburn here; http://electro-music.com/forum/viewtopic.php?t=23628 Maybe inspired by this strategy to turn functions into objects (in a roundabout way); http://electro-music.com/forum/viewtopic.php?t=23546 Tricky but useful.

1 0

chuck and jack fedora linux
by francis keyes 19 Feb '08

19 Feb '08

Hi All, When i first installed chuck a few months ago it worked right away without any problems. Now I have it installed on a new fedora Linux system and I can't get it to work. I want to use it with Jack so first I start Jack with qjackctl. Then I try to run the example foo.ck program and I get one of these two messages: JACK tmpdir identified as [/dev/shm] [chuck]: (via rtaudio): no devices found for compiled audio APIs! [chuck]: cannot initialize audio device (try using --silent/-s) Or sometimes just: JACK tmpdir identified as [/dev/shm] Aborted I've tried using it without Jack too with no success. Can anyone tel me how to troubleshoot this? Thanks!

3 4

LiSa
by Johan Nilsson 14 Feb '08

14 Feb '08

Hi! I have been looking at Lisa a bit the last few days and cant really figure out how to load wave file samples into her. One way would be to chuck a SndBuf to her and let time pass, but it seems stupid because it is inefficiend in both code length, memmory useage and startup time. Is there any good way to load wave files to Lisas wave table? Regards, Johan Nilsson _________________________________________________________________ Mörkt och kallt? Kanske Barcelona? http://search.live.com/results.aspx?q=Barcelona+reseguide&form=QBRE

2 1

Re: [chuck-users] ChucK + Summer Workshops
by Matthew Calhoun 12 Feb '08

12 Feb '08

I did one of CNMAT's Max/MSP workshops a few years ago; it was wonderful. The focus was more on learning Max and DSP/synthesis concepts than on composition. They don't seem to have any info up on 2008 workshops yet: http://cnmat.berkeley.edu/education/workshops. Matt On Feb 12, 2008, at 9:00 AM, chuck-users- request(a)lists.cs.princeton.edu wrote: > Hello, > > I am looking for a sound synthesis/composition > workshop that takes place this up comming summer. > I read that either or both CCRMA and Princeton have > had a summer workshop that focused on ChucK. > Does anyone know if this is happening this year? > > Also, if anyone knows of any good summer workshops > that use > ChucK, Max/Msp, Pd, SuperCollider, Reaktor or Kyma > (did I miss any : P ) in their curriculum, or just > provide a good educational experience in Computer > Music I'd like to hear about those as well. I am > looking for a program in The States, Europe, or Canada > that is open to undergraduates. > > Thanks in advance everyone and keep up the good work. > ChucK Rules!

1 0