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

Digi 001 and chuck
by paul j botelho 21 Jun '06

21 Jun '06

Has anyone had any luck running chuck on windows with the Digi 001? I've run chuck --probe and apparently the 001 reports sample rate of 100 and 100000! Only an srate of 100000 will output anything. I've tried various bufsize and bufnum combinations, but can only get choppy audio. Here's what chuck --probe prints out: C:\Documents and Settings\student\Desktop\chuck-1.2.0.4-exe\chuck-1.2.0.4-exe\bi n>chuck.exe --probe [chuck]: found 5 device(s) ... [chuck]: ------( chuck -- dac1 )--------------- [chuck]: device name = "Primary Sound Driver" [chuck]: probe [success] ... [chuck]: # output channels = 2 [chuck]: # input channels = 0 [chuck]: # duplex Channels = 0 [chuck]: default device = YES [chuck]: natively supported data formats: [chuck]: 16-bit int [chuck]: supported sample rates: [chuck]: 100 Hz [chuck]: 100000 Hz [chuck]: [chuck]: ------( chuck -- dac2 )--------------- [chuck]: device name = "Digidesign Digi 001: Chan 1-2 (emulated)" [chuck]: probe [success] ... [chuck]: # output channels = 2 [chuck]: # input channels = 0 [chuck]: # duplex Channels = 0 [chuck]: default device = NO [chuck]: natively supported data formats: [chuck]: 16-bit int [chuck]: supported sample rates: [chuck]: 100 Hz [chuck]: 100000 Hz [chuck]: [chuck]: ------( chuck -- dac3 )--------------- [chuck]: device name = "SoundMAX Digital Audio" [chuck]: probe [success] ... [chuck]: # output channels = 2 [chuck]: # input channels = 2 [chuck]: # duplex Channels = 2 [chuck]: default device = NO [chuck]: natively supported data formats: [chuck]: 16-bit int [chuck]: supported sample rates: [chuck]: 11025 Hz [chuck]: 22050 Hz [chuck]: 44100 Hz [chuck]: [chuck]: ------( chuck -- dac4 )--------------- [chuck]: device name = "Primary Sound Capture Driver" [chuck]: probe [success] ... [chuck]: # output channels = 0 [chuck]: # input channels = 2 [chuck]: # duplex Channels = 0 [chuck]: default device = YES [chuck]: natively supported data formats: [chuck]: 16-bit int [chuck]: supported sample rates: [chuck]: 11025 Hz [chuck]: 22050 Hz [chuck]: 44100 Hz [chuck]: [chuck]: ------( chuck -- dac5 )--------------- [chuck]: device name = "SoundMAX Digital Audio" [chuck]: probe [success] ... [chuck]: # output channels = 2 [chuck]: # input channels = 2 [chuck]: # duplex Channels = 2 [chuck]: default device = NO [chuck]: natively supported data formats: [chuck]: 16-bit int [chuck]: supported sample rates: [chuck]: 11025 Hz [chuck]: 22050 Hz [chuck]: 44100 Hz [chuck]: [chuck]: ------( chuck -- 1 MIDI inputs )------ [chuck]: [0] : "Digidesign Digi 001" [chuck]: [chuck]: ------( chuck -- 2 MIDI outputs )----- [chuck]: [0] : "Microsoft GS Wavetable SW Synth" [chuck]: [1] : "Digidesign Digi 001" [chuck]: Any help will be appreciated. paul botelho

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user study!!!
by Ge Wang 21 Jun '06

21 Jun '06

Dear all, We would like to conduct a N-part user study (where N >= 1) on using ChucK. To start, we are interested in learning about how everyone is using ChucK, the ways (if any) ChucK has effected the way you write/think about audio programming, and/or your thoughts on ChucK. A dissertation is being written (mine), and we want to include evaluations/feedback from the primary ChucK community (this list). Also, we hope to construct a page to showcase works being done using ChucK. So fire away! Thank you all very much!!! (slightly) more detail here: http://wiki.cs.princeton.edu/index.php/ChucK/UserStudy Best, chuck team

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proposals
by Atte André Jensen 21 Jun '06

21 Jun '06

Hi I think the follwing would make admin'ing shreds: 1) Some way of replacing a shred without having to worry about the id. For instance right now I get (from chuck ^): [chuck](VM): status (now == 0h0m51s, 2490368.0 samps) ... [shred id]: 2 [source]: time.ck [spork time]: 51.88s ago [shred id]: 3 [source]: spork~exp [spork time]: 51.88s ago [shred id]: 4 [source]: spork~exp [spork time]: 51.88s ago [shred id]: 5 [source]: spork~exp [spork time]: 51.88s ago [shred id]: 6 [source]: spork~exp [spork time]: 51.88s ago [shred id]: 7 [source]: spork~exp [spork time]: 51.88s ago (blocked) [shred id]: 8 [source]: sandpaper_16note.ck [spork time]: 14.63s ago (bloced) And I have sandpaper_16note.ck open in emacs (with the recent chuck mode). Suppose I modified it and wanted to replace the running version with the edit. Since the WM knows about the filename it would be very handy to quick-replace without having to type "8" for the id. Should propably fail if no or multible matches is found... 2) It would be nice to be able to reuse shred ids. As this could sometimes lead to confusion, it should be either a) and command line option or/and b) a command (like the +, -, = and ^) oyu could throw at the running wm that would make it reshuffle id's. 3) This is partly a question. It would be nice to be able to replace a class at runtime. Right now I get [time.ck]:line(1): class/type 'Time' is already defined in namespace 'global' when trying to replace shred 2 with another "time.ck". If this is actually to do now, I'd like to know how... Just a few thoughts :-) -- peace, love & harmony Atte http://www.atte.dk | quartet: http://www.anagrammer.dk http://www.atte.dk/gps | compositions: http://www.atte.dk/compositions

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sporking member function and static
by Atte André Jensen 20 Jun '06

20 Jun '06

Hi I played a bit with my problem of sporking a member function and found that the attached example (static_member.ck) actually *do* work. However (as the comment in the code suggest) if the function sporkee() is *not* declared as a static function, I get: [chuck](VM): NullPointerException: shred[id=2:spork~exp], PC=[3] Could soneone provide a meaningfull explanation, why that is? And is the exception (when "static" is removed) to be considered a bug in chuck? Finally, what *exactly* does "static" mean? The documentation states that static data and functions "are shared by all instances of that class". Ok, I understand that. But apparently "static" doesn't mean "cannot be changed" (which is what the word implies), mostly applicable to data, as the other example (static.ck) shows. So, why was the word "static" chosen, shouldn't it have been "global" or "shared" or something like that? Or is there a historical/traditional reason behind the word "static" that I'm not aware of? Whatever the reason, I think this (that "static" doesn't mean "unchangeable" and when + why it's neccessary to declare things, esp. functions "static", like in the case of "spork_member.ck") needs mention in the manual, since I might not be the only one thrown off by this... Thanks in advance for any response. -- peace, love & harmony Atte http://www.atte.dk | quartet: http://www.anagrammer.dk http://www.atte.dk/gps | compositions: http://www.atte.dk/compositions class Test { fun static void sporkee() { // must be static, otherwise gives: // [chuck](VM): NullPointerException: shred[id=2:spork~exp], PC=[3] while(true) { <<<"i'm sporkee">>>; 1::second => now; } } fun void sporker() { spork ~ sporkee(); } } Test test; test.sporker(); // keep alive while(true) { 1::second => now; } class Test { 0 => static int x; 0 => int y; fun void tell_x() { <<<x>>>; } fun void tell_y() { <<<y>>>; } } Test test; test.tell_x(); test.tell_y(); 1 => test.x; 2 => test.y; test.tell_x(); test.tell_y();

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multiple classes
by Atte André Jensen 20 Jun '06

20 Jun '06

Hi Sorry for my high activity level, but when working with something as addicting as chuck, you just go on and on :-) Anyways, I was a bit surprised that the attached code doesn't work, shouldn't it (undefined type 'myEvent')? Of course I can split it int two files and declare myEvent public (or not have bla public, but I need a public class...). -- peace, love & harmony Atte http://www.atte.dk | quartet: http://www.anagrammer.dk http://www.atte.dk/gps | compositions: http://www.atte.dk/compositions class myEvent extends Event{ int value; } public class bla{ myEvent some_event; }

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Chuck Linux and rolling your own
by mike clemow 20 Jun '06

20 Jun '06

Hi all, I wanted to hear from people who are using chuck on Linux. I'm having problems compiling chuck on my machine--but these are system issues and not chuck issues, so I'll spare you. I'd like to know who's been successful, what your machine's like, what distribution you're using, whether you had dependency issues, whether your kernels were patched for realtime, preemption, et cetera or whether you're using a vanilla kernel. I'll get it working eventually, but I'm definitely going to have to change distros in order to do it. Cheers, Mike -- "ooh aah bleep" -miraton

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loop over associative array
by Atte André Jensen 20 Jun '06

20 Jun '06

Hi How do I loop over an associative array? Since I don't see any foreach, I tried the following: int x[3]; 4 => x["n"]; <<<x["n"]>>>; for(0 => int i; i < x.cap(); i++) <<<"i:",i,", x[i]:",x[i]>>>; which clearly doesn't work. Regarding feature requests/bugs in general: Is the wiki up-to-date and this in fact where I should have put this? And any plans as to when a new version of chuck will arrive? -- peace, love & harmony Atte http://www.atte.dk | quartet: http://www.anagrammer.dk http://www.atte.dk/gps | compositions: http://www.atte.dk/compositions

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routing voice to other software
by Udit Sajjanhar 19 Jun '06

19 Jun '06

Hi all, I am receiving the sound by an microphone and outputting it to a speaker. But I want to route the sound to some other software, such as Express talk, which is a soft IP phone. How can I do this? -- ================================ Udit Sajjanhar Junior Undergraduate Student RadhaKrishnan Hall of Residence Indian Institute of Technology, Kharagpur, India. Alt email: sajjanharudit(a)yahoo.co.in

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keeping stereo files as stereo
by eduard aylon 19 Jun '06

19 Jun '06

Hello there, When loading a stereo audio file either via sndbuf or WvIn the audio is downmixed to mono automatically, is that right? If not, is there a way of accessing left/right channels from audio files? is there a way of reading stereo files while keeping them stereo and writing them back as stereo files? The following code will write a mono file in out.wav regardless the input file is stereo or mono: WvIn audio_in => WvOut audio_out => blackhole; audio_in.path( "stereo_file.wav"); audio_out.wavFilename("out.wav"); 10::second => now My second question is on regards to being able to process audio faster than realtime just for audio processing tasks and when no "audible" output is needed. Is it possible or will it be possible in the future? An example will probably be more explanatory. Let's say that you want to remove DC-offset from an audio file, but you just want to process the audio file and there's no need to listening realtime audio. If such audio file is 3 min long, one must wait 3 min in order to finish processing. Chuck has a strong sense of time, but if there are no connections to dac could a "time_less unit of time" be created in order to speed up? My apologies if these issues have been discussed earlier on the list. Thanks, eduard

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events and static data
by Atte André Jensen 19 Jun '06

19 Jun '06

Hi If I do "chuck time.ck" then "chuck + shaker.ck" I hear the shaker ticking along after a while. If I then do "chuck + change_bpm.ck" the time is speeded up but the shaker goes silent. 1) Why does it take a while before the first shaker is played, and why isn't it always the same amount of time? 2) Why does the shaker stop playing when I update the bpm? As you might guess I suspect this to be something with static data. I know "static" means "static" so if they can't be updated like this, would the way to go be to send the bpm update as yet another event? -- peace, love & harmony Atte http://www.atte.dk | quartet: http://www.anagrammer.dk http://www.atte.dk/gps | compositions: http://www.atte.dk/compositions public class Time { int bpm; static dur quarter; static dur eight; static dur sixteenth; static Event q; 10 => bpm; fun void setTime() { 1::minute/this.bpm => this.quarter; this.quarter/2 => this.eight; this.quarter/4 => this.sixteenth; } fun void sendTime() { while(true){ this.q.broadcast(); <<<"q.broadcast", now>>>; this.quarter => now; } } } Time T; 80 => T.bpm; T.setTime(); T.sendTime(); Time T; 4::T.quarter - (now % 4::T.quarter) => now; Shakers inst => dac; [0,2,3,1,4,2,6,3,4,4] @=> int mel[]; for (0=>int i; ; i++) { <<<"shaker">>>; std.mtof( 60 + mel[i%mel.cap()] ) => inst.freq; inst.noteOn( 0.5 ); T.q => now; } Time T; 200 => T.bpm; T.setTime();

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