October 2005 - chuck-users - lists.cs.princeton.edu

include
by Atte André Jensen 01 Nov '05

01 Nov '05

Is there an include or equivalent in chuck (Still thinking about how to modulize code)? -- peace, love & harmony Atte http://www.atte.dk

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emacs.el?
by Ken 01 Nov '05

01 Nov '05

i read somewhere that there is a chuck mode for emacs, but i can't seem o find it. does anyone have that available? thanks, ken

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which language?
by Ken 31 Oct '05

31 Oct '05

i'd like to take a stab at developing for chuck. which language do i need to develop in? is c supported? Thanks, Ken

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building an instrument library
by Atte André Jensen 30 Oct '05

30 Oct '05

Hi I'm just beginning to explore chuck. I set out to find a way to seperate instrument definitions from note-playing-code. I wrapped up my result so far and put them here: http://www.atte.dk/download/modular_instrument_defs.tgz The README.txt explains what to do with it, but let me re-state the problems I have: 1. Removing a shread (by "chuck - SOME_ID") stops the shred in the middle of the current note, resulting in a click. 2. Since a new shread is sporked on each note, the shread ID's quickly grow to inconveniently large proportions. The reason for sporking each note is an attempt to rid the pattern of any knowledge of the time it actually takes to play the note. 3. Sometimes adding the hh.ck pattern (not the instrument) is playing the first note very loud. Of course this is heavily inspired by the otf_* files and reveals my so far very limited understanding of chuck. But eventually I think some way of seperating out instrument design (and other stuff as well; keys, scales, tempo and meter comes to mind) would benefit my productivity in the long run... I'm not at all sure that this is the way to go, so I'd appreciate any feedback. How many of my problems are due to bugs, wrong implementations or conceptual misunderstanding? -- peace, love & harmony Atte http://www.atte.dk

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2 questions
by Atte André Jensen 29 Oct '05

29 Oct '05

Basically: 1) I'd like to define a library of instruments for reuse. Seems like this *could* be achieved by defining one class per .ck file and adding these files (possibly by a script) to a running chuck before use. Has the disadvantage that the first zillion shreds will be taken up by instrument-def files, not too handy if a replace/remove a schred. Is there a best/better way to do this? I found no include, did I overlook something? 2) Supposed I want to do a slightly complex pitch envelope. How is that best achieved? Which example to look at? -- peace, love & harmony Atte http://www.atte.dk

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1.2.0.3 compilation problem
by Michal Seta 29 Oct '05

29 Oct '05

Hello all, First of all, I am glad to see that since 1.2.0.1 the linux version of chuck behaves so much nicer! (for me, anyways) I jumped to the 1.2.0.3 now and can't get it to compile: make -f makefile.jack make[1]: Entering directory `/home/mis/downloads/chuck-1.2.0.3/src' gcc -D__LINUX_JACK__ -O3 -c -D__CK_SNDFILE_NATIVE__ chuck.yy.c chuck.lex: In function `block_comment': chuck.lex:280: error: `yytext_ptr' undeclared (first use in this function) chuck.lex:280: error: (Each undeclared identifier is reported only once chuck.lex:280: error: for each function it appears in.) make[1]: *** [chuck.yy.o] Error 1 make[1]: Leaving directory `/home/mis/downloads/chuck-1.2.0.3/src' make: [linux-jack] Error 2 (ignored) 1.2.0.1 compiled fine, have the requirements changed since then? thanks (should this be going to chuck-dev or something? I'm subbed to this list only). ./MiS

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A polymorphic OSC function?
by Ollie Glass 28 Oct '05

28 Oct '05

Hello Chuckers. Is it possible to receive any OSC event with a single event and function? In my code I create several events like this: recv.event( "/setStep,i,i,i" ) @=> OscEvent oe; recv.event( "/setBpm,f" ) @=> OscEvent obpm; recv.event( "/openWave,i,s" ) @=> OscEvent owave; Then I spork listener threads for each one: fun void bpmListener() { while ( true ) { obpm => now; while ( obpm.nextMsg() != 0 ) { ... spork ~ bpmListener(); fun void openListener() { while ( true ) { owave => now; while ( owave.nextMsg() != 0 ) { ... spork ~ openListener(); etc. So I create an event, function and thread for every OSC message I want to receive. Is there a way to make a polymorphic function that can recieve any OSC event with some if / else statements to switch based on what the message is? Any sample code would be much appreciated. Thanks, Ollie

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Minimal example not working.
by Erik de Castro Lopo 22 Oct '05

22 Oct '05

Hi all, I'm just trying to get a minimal example going. I've currently got this: sinosc s => dac; 440. => s.freq; while(true){ 1::second => now; } When I run it I get: [chuck]: RtApi: no devices found for given stream parameters. [chuck]: cannot initialize audio device (try using --silent/-s) I compiled chuck to run using linux-alsa and I'm running it on an Apple iBook running Debian Linux. ALSA is know to work correctly on this machine. Any help appreciated. Erik -- +-----------------------------------------------------------+ Erik de Castro Lopo +-----------------------------------------------------------+ "Data is not information, Information is not knowledge, Knowledge is not understanding, Understanding is not wisdom." -- Clifford Stoll

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vim syntax highlighting (update)
by Graham Percival 22 Oct '05

22 Oct '05

Eduard, thanks for ck.vim ! Here's how to use vim syntax highlighting if you don't want to copy stuff as root (or if you simply lack root, for example in a computer lab :) ---- echo "syntax on" >> ~/.vimrc mkdir ~/.vim mkdir ~/.vim/syntax cp ck.vim ~/.vim/syntax/ echo "if exists(\"did_load_filetypes\") finish endif augroup filetypedetect au! BufNewFile,BufRead *.ck setf ck augroup END" >> ~/.vim/filetype.vim ---- If you missed ck.vim the first time, you can find it here: https://lists.cs.princeton.edu/pipermail/chuck-users/2005-October/ 000047.html Thanks again, - Graham Percival

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Greetings and an Object oriented question
by Jim Hinds 21 Oct '05

21 Oct '05

Hail, MusicTech Ones of the Chuck persuasion. I appreciate the elegance and difficulty of the design and implementation of Chuck (being a sysProg type). Chuck is damn easy to get going and make great speed into shooting the foot manytimes. It's kind of like building airplanes out of balsa wood when I was a kid: nicks, cut fingers, noxious fumes, Glue stains on mom's kitchen table. But when your done, it FLIES! So, we know we like chuck. A good buddy. great set of OK default parameters to get you going asap. Low CPU load. Good language structure. Real-time modification to any parameter. all the good stuff. Even Objects and classes. So that's where my question comes from: (Yes it's probably in the documentation somewhere, maybe in the past or future, but I haven't found it) For example, suppose I want a class of say, two filters: Echo A and Echo B. I want to have these echo filters internal to the objects, and be able to chuck into and out of the objects. Is this possible and how does the class look? Class echoChamber { Echo a => Echo b; public fun void scrambleSomeInterestingStuff ( <some useful parameters> ) { //inside here we do some magic and then set parameters on a or b } public fun void initializeMe ( ) { //because we don't do constructors this week } //maybe something goes here } //Now we might want a structure like: Mandolin m => echoChamber smallroom => dac; So, my question is: This seems like a reasonable thing for a chuck Object to do, Can It? And how? Thanks, JIm

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