April 2008 - chuck-users - lists.cs.princeton.edu

getting ADSR::XTime()
by eduard 17 Jul '08

17 Jul '08

Hi list, I'm afraid there is a bug on the getters side of the ADSR UGen. One can set adsr::attackTime( 10::ms ) and gets adsr::attackTime() as 0.010::samp, instead of (0.010*SR)::samp. So, to be able to use adsr::attackTime() => now correctly, one should do: adsr::attackTime()*sr => now Which I don't think is the way one would expect. Could anyone confirm the same behaviour, so I can add it to the wiki-bug-list? eduard SinOsc s => ADSR env => Gain g => dac; env.attackTime( 10::ms ); env.decayTime( 5::ms ); env.releaseTime( 1000::ms ); <<<"env_region", "\tstate()", "\tcur time[ms]", "\ttime[samp]", "\ttime[ms]">>>; <<<"-------------------------------------------------------------------- -------","\n">>>; while( true ) { env.keyOn(); <<< "start of att", "\t", env.state(), "\t", now/ms , "\t", env.attackTime()/samp, "\t", env.attackTime()/ms>>>; env.attackTime() => now; <<< "end of att", "\t", env.state(), "\t", now/ms >>>; <<< "start of dcy", "\t", env.state(), "\t", now/ms, "\t", env.decayTime()/samp, "\t", env.decayTime()/ms >>>; env.decayTime() => now; <<< "end of dcy", "\t", env.state(), "\t", now/ms >>>; env.keyOff(); <<< "start release", "\t", env.state(), "\t", now/ms, "\t", env.releaseTime()/samp, "\t", env.releaseTime()/ms >>>; env.releaseTime() => now; <<<"end release", "\t", env.state(), "\t", now/ms >>>; 1::second => now; <<< "\n","******************\n">>>;

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osc to keyboard
by Alpha Core 19 May '08

19 May '08

hello Ive been working on triggering Osc by the use of the keyboard and im still a having trouble I read the kb.ck file in the hid folder to figure out how it triggered and output the keys so i came up with the below syntax. // setting up the keyboard to trigger Osc // this should trigger a middle c tone when A key is pressed { if (msg.is ButtonDown()) and if (msg.my_keynumber = 65 then SinOsc s => Dac; 261 => s.freq; 1::second => now } it still giving me errors ? even when i running the kb.ck file in chuck any help would be great thanks Gabriel --------------------------------- Be a better pen pal. Text or chat with friends inside Yahoo! Mail. See how.

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4 channels output
by Atte André Jensen 10 May '08

10 May '08

Hi I'd like to address 4 outputs under linux. Currently my soundcard has only 2 channels out. So before I rush out and buy something I'd like to know: can chuck can handle multiple outputs? -- peace, love & harmony Atte http://atte.dk | http://myspace.com/attejensen http://anagrammer.dk | http://modlys.dk

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Create your own scratch pad!
by Martin Ahnelöv 04 May '08

04 May '08

<http://www.metacafe.com/watch/849223/how_to_make_your_own_scratchpad/> cheers, Gasten

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reference sub-sections of multi-dimensional arrays
by eli queen 30 Apr '08

30 Apr '08

hi all ... this is my first post to the list. so, as you would guess, i'm new to chuck. the question ... i'm working on a class with following functionality: serial 12 tone row in > calculate a 12 tone matrix (2D array) > lookup indexed rows (transposition) and/or lookup indexed columns (inversion) > output lookups as 1D arrays the row (x) part is simple: array2D[ row# ] @=> int array1D[]; but, is it possible to reference the y subsection of a 2D array? i know i could do it with a function i.e.: int i[12]; fun void invrton ( int y ) { for (0 => int x; x < 12; x++) { toneRow.matrix[x][y] => i[x]; } } invrton(1); this will assign i[] as values of column i(1), but is there a way w/o the function? i'll most likely put both lookups in the public twlvTone class so the patterns can be accessed by shered-ed instruments. anyway ... here's the full code: public class twlvTone { int matrix[12][12]; fun void setMatrix ( int p0[] ) { for (0 => int x; x < 12; x++) { for (0 => int y; y < 12; y++) { (p0[x] + ((12 - p0[y]) % 12)) % 12 => matrix[y][x]; } } } } twlvTone toneRow; toneRow.setMatrix( [0, 11, 7, 8, 3, 1, 2, 10, 6, 5, 4, 9] ); <<< toneRow.matrix[0][5] >>>; toneRow.matrix[1] @=> int t1[]; <<< t1[11] >>>; thanks, eli

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fixin' build on non-Mac platforms
by Stephen Sinclair 28 Apr '08

28 Apr '08

Hi, There's currently a couple of missing stub functions in the CVS which breaks the build for non-Mac platforms. Here's a patch. Steve

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osc listener shred woes
by mike clemow 28 Apr '08

28 Apr '08

Hello all, So, the following code sporks out two shreds to listen for two (for now--I want to be using 14) OSC messages, put their int values into an event and report back to the parent shred with the value and the address. This is supposed to be a way to get around the fact that, a) I seem to have to listen on a different port if the OSC messages have the same type, b) that I can't wait on multiple events and, c) that I want all the values to control parameters in a single patch. My OSC messages are being lobbed at Chuck via a Python script and everything seems to be working fine on that end. I've even gotten this to work using two chuck shreds that were manually sporked. At any rate, this code runs fine for about two seconds and then dies in either a segmentation fault or a bus error. Any guesses? --- // extend the Event class class Bang extends Event { string message; int value; } // a generic osc listener shred fun void oscListener( Bang b, int port, string osctype ) { // create our OSC receiver OscRecv recv; port => recv.port; recv.listen(); // create an address in the receiver, store in new variable recv.event( osctype ) @=> OscEvent oe; while( true ) { // wait for osc event to arrive oe => now; while( oe.nextMsg() ) { oe.getInt() => b.value; osctype => b.message; b.broadcast(); } } } // our event "Bang" Bang bang; 8000 => int oscport; // the types for the osc objects "/leftraw, i" => string leftraw; "/leftavg, i" => string leftavg; spork ~ oscListener( bang, oscport, leftraw ); // shreds are usually happier listening on a separate port spork ~ oscListener( bang, oscport + 1, leftavg ); SinOsc raw => dac; SinOsc avg => dac; while( true ) { bang => now; //<<<bang.message, bang.value>>>; if( bang.message == leftraw ) { bang.value => raw.freq; } else if( bang.message == leftavg ) { bang.value => avg.freq; } }

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Time-stretching without changing pitch
by Nuno Godinho 27 Apr '08

27 Apr '08

Hi, For a video installation I need to create a module to do interactive time-stretching without changing pitch. This will use a WAV file as input but the speed will change interactively based on an OSC parameter. But to make it simpler let's say the playback speed depends on the mouse speed. I understand there are two ways to achieve this: FFT and Granular Synthesis. The granular synthesis example that comes with Max/MSP almost does this out-of-the-box, but I would like to try to avoid and use ChucK instead. But, even though I've read the manual and understood some of the examples, I'm still very Chuck-ignorant and have no experience whatsoever. Since now ChucK is able to do FFT I was wondering how easy it is to implement this on ChucK using FFT. On the other side, some documentation I've read on time-stretching suggests that the simple FFT process creates lots of artifacts and there has been a lot of research on this and several improved methods were proposed. This scares me because I would like to melt my brain learning all the details, since that Max/MSP patch already does something quite close to what I need. Has anyone done (or knows how to do) time-stretching on ChucK? Should I go for FFT or Granular Synthesis? Any help is welcome. Thanks in advance! Nuno

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Processing --> ChucK, was: MAUI for PC/Linux
by Michael Heuer 26 Apr '08

26 Apr '08

mike clemow wrote: > ... > When I run a UI I made in Processing to control Chuck, Chuck doesn't even have to be > running on the same machine, since all the control messages are sent via UPD as OSC > messages. Processing --> Chuck? Very cool. I would be very interested to see what you have done from the Processing side. I have a lot of libraries in java for e.g. genetic algorithms, neural networks, etc. that I would love to drive ChucK with but hadn't found a good mechanism to do so. I had been going about the re-write the java libraries in ChucK syntax task but without namespaces and resizeable arrays that is becoming tiresome. michael

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mailing list archive certificate
by Kassen 25 Apr '08

25 Apr '08

Hi, list! small note; with the new Ubuntu that's out now I switched to Firefox3 and Firefox now insists it's having a problem with the security certificate on the list archives. I'm not sure why the list archives need to be that secure, after all we don't check the identity of people sendining mail to the list either but if we have a certifficate it should work, I think. Brief browser info pasted below, I'd be happy to supply more info if needed. --------------- Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9b5) Gecko/2008041514 Firefox/3.0b5 --------------- For now I had Firefox add a exception for this certifficate. I'm quite sure this list isn't the right place to mention this but I also have high hope somebody on the list will have the address of the Princeton SC mailserver admin. Yours, Kas.

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