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Question on Shred Scheduling
by Mike McGonagle 12 Jun '06

12 Jun '06

I am working on a complete rewrite of my Masking package (the original was too bulky and dependant on creating hundreds of shreds), and was wondering just how something is scheduled in ChucK. Basically, I am trying to create a single shred that handles the updating of various parameters (as opposed to the original which had a shred for each parameter), and in doing so, I would like to create a "locking" mechanism around an array used to control which parameters get updated, and when. On one shred, there is the code that controlls the updating of parameters, this shred runs for the life of the program (or some portion of). On the second shred (most likely the main shred), the array containing the references to the parameters to be updated needs to be locked to prevent having a new reference added while the first shred is actually updating the parameters. (Does this make sense?) So, what I would like to know is how the following code would execute. now + 0::ms => now; Would this push the execution of the code to follow to the end of the current time slice? Or is this functionality undefined, and would it execute these shreds in an arbitrary fashion? In a nut shell, this is the code from the updating shred that locks the array... (this is embedded in an object) false => int locked; false => int keepGoing; MController @ controllers[]; // this gets initialized to match the number of controlled parameters fun void helper(....) { true => keepGoing; while(keepGoing) { while(locked) { now + 0::ms => now; } true => locked; for(0 => int i; i < controllers.cap(); i++) { if (controllers[i] != null) { <<< "do something with this controller", "" >>>; } } false => locked; } } The variable 'locked' controlls the access to the 'for' loop, and the variable 'keepGoing' controlls the outer loop. 'keepGoing' is set to true at the top of this code, but will be set to false by another shred to force the 'helper' function to exit as needed. The array 'controllers' is accessed by both this shred, as well as the main shred to add -- Help the Environment, Plant a Bush back in Texas!

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hail to all!
by biotechisgodzilla.wifebeater 10 Jun '06

10 Jun '06

Greetings to everyone i've just subscribe this list and wish to scream at u ... OMFG IT'S YEARS THAT I'M LOOKING TO A SOFTWARE LIKE THAT!!!!! i reach that project because it's a dependancy of that tool: http://www.blackholeprojector.com/index.html (Breakage) [which i still have not tested] {now i'm too busy with playing with chuck} which was notified today on freshmeat i've just build the binary of crunch, run some example and read some docs on the site i'm definitely already in love with this piece of art tnx to all developers .mike p.s.: running on debian sarge on an AMD laptop @ 800Mhz with --bufsize2048, works like a charm with no glitches

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Re: [chuck-users] AI drum machine
by Ollie Glass 09 Jun '06

09 Jun '06

> Wow - that looks REALLY interesting! Thank you :-) > I managed to get it up and running on my (Windows) PC - but I had > to change the chuck file (not the midi one) so that the default > samples were loaded. It was looking in the 'data' folder rather > than 'samples' - also the closed hat and open hat are ch.wav and > oh.wav. Thanks for these comments, I've fixed these bugs in the new release. > Would it be possible to add note length at some point? Although > this is probably moving away from the drum machine approach. At the moment the samples play for their 'natural' length. I can see how note length could be done if the sequence sent MIDI out events but not with samples. How would you do this? > > Can't wait to try it out with more channels and my own samples. > > Thanks a tonne! > > rikrak > >> On 6/8/06, Ollie Glass <ollieglaskovik(a)gmail.com> wrote: >> I've released an artificially intelligent drum machine using ChucK at >> www.blackholeprojector.com >> >> Hope you enjoy it. The two scripts for the step sequencer could be >> useful to people doing related things. >> >> Thanks to everyone who made ChucK, answered my questions on this list >> and made my app possible! >> >> Ollie >> _______________________________________________ >> chuck-users mailing list >> chuck-users(a)lists.cs.princeton.edu >> https://lists.cs.princeton.edu/mailman/listinfo/chuck-users

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What about "delayp"
by Jim Hinds 08 Jun '06

08 Jun '06

I'm looking at the documentation for the unit generator 'delayp' Too cryptic for me. The source code isn't very helpful either. And the delayp.ck example prog seems to have gone missing. Can anyone enlighten me about the adjustable write window and what that is supposed to do? Jim Hinds jahbini(a)jahbini.org http://www.celarien.com/ http://www.jahbini.info/

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AI drum machine
by Ollie Glass 08 Jun '06

08 Jun '06

I've released an artificially intelligent drum machine using ChucK at www.blackholeprojector.com Hope you enjoy it. The two scripts for the step sequencer could be useful to people doing related things. Thanks to everyone who made ChucK, answered my questions on this list and made my app possible! Ollie

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setenv?
by Kassen 01 Jun '06

01 Jun '06

Hi list, Is there a known issue with std.setenv() ? For me on XP sp1 std.setenv("foo", "bar"); Returns a zero and doesn't actually set anything. What I want to acomplish is the following; I want to have one shred that calls in a set of other shreds that all sync in the style of the otf examples but I'd like to set a environment variable that tells them what our bpm will be. Also; do I understand correctly that the only way of turning a string into a int or float is by abusing the acii numbers? Even if I happen to know the string is a number? As I type this I just realised it might be a lot more practical to stop postponing reading up on global classes, still it looks like std.setenv() is malfuctioning. Yours, kas.

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More buffer record and samplelooping
by Hans Leeuw 31 May '06

31 May '06

Hi list, I tried a few things with the array solution mentioned. It works but it takes a lot of the processor. I got about 10 sporks going (plain playing), but I'd like to use some of the flexibility of 'sndbuf' So I'd like to try writing to disk and using a sndbuf as well. But with the following lines of code it does not work. The sound is not properly written to disk. //sucking samples; adc => WvOut w => blackhole; // this is the output file name "/Users/hansleeuw/miniaudiclefolder/examples/data/trumpet.wav" => w.wavFilename; 1 => w.record; //start recording 2::second => now; //a soundfile of 2 seconds 0 => w.record; //stop recording w.closeFile; //to do it properly (also tried without) // Now loading the soundfile in and here the program crashes // (miniaudicle and terminal) sndbuf buf => dac; "/Users/hansleeuw/miniaudiclefolder/examples/data/trumpet.wav" => buf.read; while( true ) 1::second => now; In terminal I get the messages: ugen_xxx.cpp:1986: failed assertion `d->fd == NULL' Abort trap What can be the problem? It seems the soundfile is not written properly. Quicktime gives "incorrect duration" (-1024). I don't have a problem loading 'proper' soundfiles with sndbuf. Thanks for your time. Best, Hans.

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ChucKML Download
by DANIEL MAGNUSZEWSKI 22 May '06

22 May '06

ChucKML ( http://wiki.cs.princeton.edu/index.php/ChucKML ) appears to be very interesting, and useful for what I want to do. I don't know if I'm missing or overlooking anything, but I can't find where to download this. Can someone point me in the right direction? Thanks. -Dan

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Joypad abuse.
by Kassen 22 May '06

22 May '06

Hi list. In testing my new joypad I quickly cooked this up. It's kinda cheap but like many cheap things it's good fun so I thought somebody else might have fun with it too. I'm asuming everybody has amen or simmilar break lying around somewhere. With a little practice somewhat convincing jungle can be made, this takes considderably less time then it took years ago cutting&pasting in a wave editor.... It's just a quick toy, if anybody needs comments somewhere I'd be happy to help. By the way; I'm using one of these "thrustmaster" youpads now that are styled after teh PS2 ones. With this the "stutter" and "reverse" buttons end up conveniently under your index fingers. If you are using some flight-sim joystick none of thismay make sense and you may need to edit a little. For what it's worth, Kas. ------------------------- sndbuf buf => PitShift ps => dac; "data/amnbreak.wav" => buf.read; 1 => buf.loop; 1 => ps.mix; buf.samples() => int A; (A / 32) => int beat; beat::samp => dur click; int pos2; int pos1; 1 => int dir; int stut; click / 4 => dur frtclick; 4 => int rate; fun void joyreader() { // make HidIn and HidMsg HidIn hi; HidMsg msg; // open joystick 0, exit on fail if( !hi.openJoystick( 0 ) ) me.exit(); // infinite event loop while( true ) { // wait on HidIn as event hi => now; // messages received while( hi.recv( msg ) ) { <<< msg.type, msg.which, msg.idata, msg.fdata >>>; if (msg.type == 0 && msg.which == 1 ) (-msg.fdata + 1) * dir => buf.rate; if (msg.type == 0 && msg.which == 0 ) ((16 * msg.fdata) + 16) $ int => rate; if (msg.type == 0 && msg.which == 2 ) 1 - msg.fdata => ps.shift; if (msg.type == 0 && msg.which == 3 ) (A * msg.fdata * msg.fdata) $ int => pos2; if (msg.type == 1 && msg.which == 0 ) 0 => pos1; if (msg.type == 1 && msg.which == 1 ) (A / 4) => pos1; if (msg.type == 1 && msg.which == 2 ) 2 * (A / 4) => pos1; if (msg.type == 1 && msg.which == 3 ) 3 * (A / 4) => pos1; if (msg.type == 1 && msg.which == 4 ) { -1 => dir; if ( (buf.rate() * dir) < 0) (-1 * buf.rate() ) => buf.rate; } if (msg.type == 2 && msg.which == 4 ) { 1 => dir; if ( (buf.rate() * dir) < 0) (-1 * buf.rate() ) => buf.rate; } if (msg.type == 1 && msg.which == 6 ) 1 => stut; if (msg.type == 2 && msg.which == 6 ) 0 => stut; } } } spork ~ joyreader(); 0 => int step; fun void sync() { click - (now % click) => now; while(true) { if(!stut) { step * beat => pos1; pos1 => buf.pos; } 1 +=> step; (step % 32) => step; click => now; } } spork ~ sync(); click - (now % click) => now; while (true) { if (stut)(pos1 + pos2) % A => buf.pos; if (rate==0) 1 => rate; rate * frtclick => now; }

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multi channel and EMU under XP?
by Kassen 19 May '06

19 May '06

Hi, list. Has anybody gotten the multi-channel stuff to work with one of the EMU cards that use Patchmix under XP? I dug through a stack of online posts and it seems that in the past these cards had issues with multi channel DX but right now Winamp is set to "primary sound driver" and does a perfect job of playing a six channel wave file while ChucK --probe doesn't get beyond 2 channels on any of the devices it sees. I use a1616m but I think the drivers are basically the same for all of them. Any pointers would be very welcome. Kas.

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