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

ChucK on the radio
by Graham Coleman 22 Nov '06

22 Nov '06

ChucK radioheads, I'll be doing some live music on WREK 91.1 Atlanta (Georgia Tech) this afternoon for The Mobius, the specialty electronic show. I'll be livecoding and maybe talking about ChucK a bit. Tune in if you're in Atlanta, otherwise you might be able to catch the live or archived stream at http://www.wrek.org/. The show starts at 7pm, I'll probably go on at 8pm EST. just so I can share, recent ChucK tracks: http://ravelite.org/music/sketches/prelude%20cffx.mp3 (a cover) http://ravelite.org/music/sketches/chuck_ex14c.mp3 http://ravelite.org/music/sketches/chuck_ex18i.mp3 from the Atlanta Laptop Battle Finals: http://www.zeroplate.com/laptop/gc1.mp3 http://www.zeroplate.com/laptop/gc3.mp3 keep on ChucKing, Graham

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sociative polydimenional arrays
by Kassen 21 Nov '06

21 Nov '06

Hi list, some more arrays for fun and (potential?) profit.... //this goes well; int foo[8]; 3 => foo[0]; 5 => foo["test"]; //let's make sure <<< foo[0] >>>; <<< foo["test"] >>>; //that was fun! //lets do it again in 2D! //fine int bar[3][8]; //fine 3 => bar[0][0]; //not so fine 5 => bar[0]["test"]; //we never get here <<< foo[0][0] >>>; <<< foo[0]["test"] >>>; Why is this? Is this a bug? Missing feature? Complete misunderstanding of how to combine polydimentional arrays and sociative-ness? ChucK claims foo goes out of bounds but I suspect it's either a bug or a syntax error because frankly I can't see how I could prevent 5 => bar[0]["test"]; from going out of bounds. Yours, Kas.

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reseting sndbuf
by altern 17 Nov '06

17 Nov '06

hi here i am with my weekly question ;) Le t see if I explain this properly, I have few sndbuf playing. For this i am using a class that instantiates and controls a buffer and keeps the data for the buffer. It also sporks a shred that plays the sound. At some point and while the buffer is being played i need to change the start point and length of the loop played. At the moment, the buffer keeps playing until it is time to start again and it does not updates its values until the loop is executed again. I would need the buffer to acknowledge that the length has changed 'on the fly'. How could I do this? This is the method sporked by the player class to play the buffer fun void loop() { while(!paused){ //play loop again if not paused gain => buffer.gain; gpitch => buffer.rate; pos => buffer.pos; pan => p.pan; length::samp => now; } } If I understand well, this line length::samp => now; means that until the lenght time has passed the while wont loop again. So i would need some way to detect the current pos of the buffer then stop that sound and restart again the while with the new values at the pos where the sound was at the moment of the change. I am not sure about how to to this or if this is the right way to do it. any tips? thanks enrike

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running chuck as a process with no terminal?
by altern 17 Nov '06

17 Nov '06

hi i am launching chuck from python (i have a python GUI and chuck works as sound engine). When I run chuck from python it opens a terminal, I would like to hide this. I use python os.spawnv command for this. In PD there is a startup flag -nogui that launches pd as a process with no console whatsoever, only visible via top or process list. Anything like that in ChucK? i have checked the documentation for the virtual machine but i could not see anything in this direction. Another important issue i am having is that as soon as the chuck terminal loses the focus the sound stops. So when I select the python window the sound stops. Is there any way to avoid this? I am working on xp at the moment, so i havent tested if this happens as well on linux or osx. I have very limited access to internet for a few days so i cannot search on the mailing list archive or the forum about this issue. Sorry. thanks enrike

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eval and concatenating strings
by altern 15 Nov '06

15 Nov '06

hi again here i am with couple of questions again. is there a way to concatenate strings? I am trying different ways with no much luck and i have checked the docs but i could not find a way to it. another issue is: is there a way to eval a string as code like in python or actionscript? The questions come from some commands i am forced to type over and over despite of being almost identical recv.event("/0/mute, i") @=> OscEvent mute0_osc; the only difference of the number (0 in this case) for each of the sample players i have constructed Would it be possible to create variables on the fly from concatenated strings? I mean something like (in wish code) for (0 => int n; n < 8; n++){ "/" + Std.itoa(n) + "/mute, i" @=> string address; //concatenate string recv.event(address) @=> OscEvent Std.eval("mute"+ Std.itoa(n) + "_osc"); //concatenate and eval string } thanks enrike

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how do you maipulate an array with rand2()?
by Malik Martin 14 Nov '06

14 Nov '06

hi i already posted this on the forums, but it doesnt seem as active as i imagine the mailing list might be(no offense of course). so here's my post hi i'm trying to access an array with rand2() but i get syntax errors: while( true ) { //1 bar at 180bpm cut into 8ths float push[ 0, 166.625, 333.25, 499.875, 666.5, 833.125, 999.75, 1166.375 ] push[Math.rand2(0,7)] => buf.pos; 1333::ms => now; } i made a second post with a minor update i noticed my syntax errors in comparison to otf_06.ck on page 49 in the manual and re-wrote it. // time loop while( true ) { //1 bar at 180bpm cut into 8ths [ 0, 166.625, 333.25, 499.875, 666.5, 833.125, 999.75, 1166.375 ]@=> float push[]; push[Math.rand2(0,7)] => buf.pos; 1333::ms => now; } but i still get this error: [SndBufTest1.ck]:line(19): array init [...] contains incompatible types... Malik

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float and float[]
by Kassen 12 Nov '06

12 Nov '06

Hi, list, I find ChucK's reaction to the following lines rather surprising. //this works, obviously 1.0 => float foo; //this is fine with chuck as well 1 => float bar; //this works as well, also obviously [1.0] @=> float fooray[]; //then why does this cause a error? [1] @=> float barray[]; Is this intentional and if so could we considder a more readable error? Right now this last line gives a error that looks (to me) like the dimentions of a multi-dimentional array don't add up which is a bit confusing Yours, Kas.

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--bufsize on Win (is fine?!!)
by Kassen 11 Nov '06

11 Nov '06

Hi, list. I just noticed that these days we can actually set the --bufsize on Windows without (unwanted) noises or complaints. That wouldn't be reason for a post but I can't remember any anouncement about this fix. Is this perhaps a side effect of the resent clean-up spree and if so does that mean we are now closer to getting DAC channels above two working? Just curious, three cheers for unexpected low latency! Merily chucking along, Kas.

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quiting chuck from chuck and saving reference to function
by altern 09 Nov '06

09 Nov '06

hi here i am again with a couple of questions : A : is it possible to quit Chuck from Chuck? I need to quit chuck when a certain osc message arrives, and i was wondering if there is a command to do this. B: can i store references to functions in variables? similar to the python: def myfunc(): dowhatever myvar = myfunc myvar() thanks! enrike

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not receiving osc in
by altern 07 Nov '06

07 Nov '06

hi i am testing osc implementation in Chuck but i dont get incomming messages. i manage to send from chuck to pd but not the other way around. i attach the pd patch and the chuck file in case anyone want to have a look. I am not sure what it could be the port should be ok as I tried with python and pd with the same ports and everything worked perfectly. So i guess i am missing something on the chuck side. thanks enrike #N canvas 0 0 466 316 12; #X obj 86 214 sendOSC; #X floatatom 87 270 5 0 0 0 - - -; #X msg 127 98 send /test 1; #X obj 308 223 print; #X obj 300 172 dumpOSC 9000; #X msg 31 72 connect localhost 9001; #X msg 125 157 send /test \$1; #X floatatom 125 137 5 0 0 0 - - -; #X obj 28 27 loadbang; #X connect 0 0 1 0; #X connect 2 0 0 0; #X connect 4 0 3 0; #X connect 5 0 0 0; #X connect 6 0 0 0; #X connect 7 0 6 0; #X connect 8 0 5 0; OscSend xmit; xmit.setHost( "localhost", 9000); // create our OSC receiver OscRecv recv; 9001 => recv.port; recv.listen(); recv.event( "/test, f" ) @=> OscEvent t; // infinite event loop while ( true ){ <<<"sending">>>; xmit.startMsg( "/sndbuf/buf/rate", "f" ); 0.5 => xmit.addFloat; 0.2::second => now; //send something t => now; // wait for event to arrive // grab the next message from the queue. while ( t.nextMsg() != 0 ){ <<<t.getFloat()>>>; } }

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