November 2009 - chuck-users - lists.cs.princeton.edu

Laptop Battle
by Les Hall 10 Nov '09

10 Nov '09

This year at the electro-music 2009 festival, I did the ChucK community proud by winning the Laptop Battle along with a guy who played some awesome guitar (there were two winners this year). My routine was good, but for next year the electro-music 2008 Laptop Battle winner has thrown down the gauntlet and challenged me to a new five-minute timed battle! It's all in good fun, of course, yet I take the competition seriously. My performance will consist of a program controlled by one or two accelerometer boards such that when I move my hand(s) around, ChucK makes noise. I'll do dance or Tai Chi type motions and generate sound from ChucK that will thrill the audience! Right now I'm just collecting sounds to later stitch together into an application. Already kijjaz and I have created some very nice Thunder and Cannon Fire (posted to the wiki if you want the code), yet what is still lacking are two sounds: Lightning and what I can only call "Ripping a Hole in the Fabric of Space-Time", an eerie and ominous sound made by sweeping a hand from side to side. Maybe I'll light up some traffic flares and hold them in my hands during the performance for dramatic effect? Anyway, I'm calling on the ChucK community to provide me with some awesome engaging sounds. The battle isn't until September so we have lots of time to work on this, though I'd like to get something fleshed out in the next few months so I can practice and use the routine at sooner festivals. So give me your best! If you only have an idea for an algorithm, that will do nicely, I'll code it up and test it... You got your game on? Les (Inventor) For those about to ChucK we salute you! - Ge Wang!

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Re: [chuck-users] fried audio
by Hans Aberg 10 Nov '09

10 Nov '09

[Note: you did not cc the list.] It fries my audio, too, only hearing the program but nothing else, but only as long as it runs, the other audio coming back when it is taken down. I think it may not be necessary to use lanchctl to when restarting coreaudiod, because it just restarts the latter if it stops. Restarting coreaudiod, going to sleep and back again, login out and in, restarting, and fiddling around with the headphone jack did not really help when the problem was present on my computer. One could sometimes get it back a few seconds, a minut or sometimes some tens of minutes, but not permanently. But after doing the procedure I described, I haven't had any problems. So you might check if you followed it exactly, or check if you have some other components installed that may break the sound. (I actually installed Perian again, rebooted, then marked it uninstalled in System Preferences, rebooted, then took it away from / Library/PreferencePanes/, rebooted before applying the Combo 10.5.8.) Hans On 10 Nov 2009, at 13:52, David Loberg Code wrote: > No, sadly it did not work. > Here is, for example, a one-liner by kijjaz that kills my audio > every time. > > >> Step s => dac; float x, y; while(samp => now) { (((x * pi => >> Math.cos) + y => y => Math.cos) + x => x) * y => s.next; } > > david > > David Loberg Code > School of Music > Western Michigan University > Kalamazoo, MI 49008 > code(a)wmich.edu On 10 Nov 2009, at 14:07, David Loberg Code wrote: > I've also tried going into launchctl to stop & start the coreaudiod, > but that didn't work either. > > david

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Re: [chuck-users] fried audio
by David Loberg Code 10 Nov '09

10 Nov '09

I have tried the sudo kill suggestion, below. It gives me two pops with the audio, but doesn't restore anything. I still have to shut down and reboot to get my audio working again. I have also uninstalled Perian. Any other tricks? >> I have been enjoying all of these One-Liners (ChucKles? TweecKs? >> ChaiKus?) >> http://electro-music.com/forum/topic-13512.html >> Some of them kill my audio. Is there a way to clear or reset the >> audio engine without rebooting my MacBook? > > It might not be this stuff that fries your Mac, but some sound > component in combination with the latest system updates. I had to > remove Perian (for which I used a complicated procedure), and apply > Combo 10.5.8 (and then do a permissions repair). > > You might try killing off coreaudiod. Do say > ps -ax | grep audio > so see the process number <pid> of coreaudiod, and then do 'sudo > kill <pid>'. As it is a daemon, run by launchd (see 'man > launchctl'), it will restart immediately. You may also try putting > it to sleep, and awaken again. > > Hans

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Urgent shot in the dark -- Audible clicks when spawning shreds when SndBuf reads from disk
by mike clemow 10 Nov '09

10 Nov '09

This is a shot-in-the-dark... At the last minute, the person who was responsible for doing the sound with a Kyma system, couldn't get it to trigger sounds with MIDI (for some reason or another) and I'm stepping up and doing the whole show with pre-recorded material in ChucK. (I know, I know -- I'm crazy.) It's 9:25am here on the East Coast of the U.S. We're onstage at 2pm and 8pm. I have a script that receives OSC messages from a Java program. The messages contain the string name of a file to play. It's a simple stereo file (I'm already working with a very kludgy way of playing stereo files--loading it twice into two buffers). But every time I spawn a new thread, the file loads from disk and there's an audible click, or drop in audio. Now, I know that one way around this is to pre-load all the files into SndBuf objects and then trigger them to play using Events. The only trouble is that there are 73 files for this piece and some of them are pretty large. I'm afraid of eating all my RAM / bringing everything to a grinding halt. I'm posting my entire script at the end of the email. If anyone has any thoughts, please send them along. Otherwise, we'll just deal with the way things are. Best, Mike -- http://michaelclemow.com http://semiotech.org // ---- CODE ---- // "/Users/michaelclemow/chuck/Sandresky/sounds/" => string dirPrefix; // osc event creator function fun OscEvent createOscEvent( string address, int port ) { OscRecv recv; port => recv.port; recv.listen(); recv.event( address ) @=> OscEvent oe; return oe; } // play file function fun void playFile(string filename) { SndBuf l, r; l.chunks(1024); r.chunks(1024); r.read(filename); l.read(filename); 0.2 => l.gain => r.gain; l.channel(0); l => dac.chan(0); l => dac.chan(2); r.channel(1); r => dac.chan(1); r => dac.chan(3); l.pos(0); r.pos(0); l.play(1); r.play(1); r.length() => now; me.yield(); } createOscEvent( "/play, s", 12000 ) @=> OscEvent oe; string file; 9999 => int last; fun void killLast() { createOscEvent( "/killlast, i", 12000 ) @=> OscEvent kill; while( kill => now ) { if( kill.nextMsg() ) { kill.getInt() => int k; <<< "killing last id:", last >>>; Machine.remove( last ); } me.yield(); } } fun void playListen() { while( oe => now ) { if( oe.nextMsg() ) { oe.getString() => file; // spawn player (spork ~playFile( dirPrefix + file )).id() => last; me.yield(); <<< "playing", file, "id", last >>>; } me.yield(); } } <<< "spawning listeners" >>>; spork ~killLast(); spork ~playListen(); me.yield(); 0 => int seconds; // wait for messages and play files <<< "listening..." >>>; while(true) { 1::second => now; //<<< seconds++ >>>; } // --- END CODE --- //

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Re: [chuck-users] Urgent shot in the dark -- Audible clicks when spawning shreds when SndBuf reads from disk
by Perry R Cook 08 Nov '09

08 Nov '09

Definitely look into doing the block load option, because ChucK won't execute the next line (or compute audio) until the whole file is loaded into the SndBuf. That being said, I've fixed this many a time by loading the files once and getting them into the cache. You can make a dummy .ck file that just loads all those files into SndBufs, then returns. Run that first and then run your program. Clicks might go away. But if they're too big, then this won't work because there will be cache misses and you'll be back to disk seeks. PRC

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LiSa looplength difference [bug?]
by Kassen 04 Nov '09

04 Nov '09

Hi list, dear Dan, Stephan just asked a question on the forum here; http://electro-music.com/forum/viewtopic.php?p=269941#269941 I investigated some more and it turns out that when LiSa's loopEnd is also the .duration() the resultant loop will be off by one sample for playback but not for recording. Correct behaviour can be had by setting the duration more generously and the loopEnd explicitly (give or take floating point rounding that doesn't seem to carry). I'm not sure this is correct behaviour; I'd expect playback and recording to work in the same way here. If you, Dan, would have a moment, could you see whether you can confirm this behaviour and see whether this is a issue? Yours, Kas.

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fried audio
by David Loberg Code 04 Nov '09

04 Nov '09

I have been enjoying all of these One-Liners (ChucKles? TweecKs? ChaiKus?) http://electro-music.com/forum/topic-13512.html Some of them kill my audio. Is there a way to clear or reset the audio engine without rebooting my MacBook? thanks, david David Loberg Code School of Music Western Michigan University Kalamazoo, MI 49008 code(a)wmich.edu

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ChucK highlight script for SciTE
by Szilveszter Tóth 03 Nov '09

03 Nov '09

Hello All, I have found "highlight scripts" (or whatever we call them) for VIM and for JEdit on the web page, but I'd like to stick to SciTE, which I like the most. However, it does not seem to know ChucK... Does anyone have a SciTE .properties file for ChucK or should I make one? BTW, selecting "Java" as the language highlights keywords quite well. Regards, Szilveszter (aka Hillaby)

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Problem with miniAudicle/ubuntu 9.10/jack
by Atte André Jensen 03 Nov '09

03 Nov '09

Hi I just installed ubuntu 9.10 and having a bit of trouble with miniAudicle (chuck seems to work just fine) running under jack (alsa works). When I start miniAudicle I get a dialog saying: The Virtual Machine appears to be hanging. This is typically caused by a shred running in an infinite loop, or it may simply be a shred performing a finite amount of heavy processing. If you would like to abort the current shred and unhang the virtual machine, click "Yes." To leave the current shred running, click "No." If you choose to leave the current shred running, execution of on-the-fly programming commands may be delayed. Would you like to abort the current shred? More over the "running time" is shown as 4259175902:4294967288. Any idea what could be the problem? I should note that My Other Main Audio Program (aka Renoise) is working fine with jack. -- Atte http://atte.dk http://modlys.dk http://virb.com/atte

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multiple voices in LiSa
by Jon Forsyth 03 Nov '09

03 Nov '09

Hello all, I've looked at the mailing list archives, and it seems that there's no way to send different LiSa voices to separate UGens. I'm wondering if this is still the case, and if so, if there are any work-arounds that are likely to work in real time. Thanks, Jon

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