August 2011 - chuck-users - lists.cs.princeton.edu

Scale & diatonic
by Hans Aberg 12 Oct '11

12 Oct '11

I have made a program, scale.ck, that admits one to work with scales, including tuning stretch, céleste tremulant, retune them, and then save to a file, with a line of code that can be pasted back into the source, available at next program startup. Scale tunings can be put into tuning banks, and otherwise defined by your favorite method. Details in the file. I have also updated my program for diatonic tuning systems, diatonic.ck. Just a few changes: adding some common tunings, fixing typos. The files are available here: http://www.math.su.se/~haberg/tuning_systems/ Hans

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Re: [chuck-users] here's an idea
by Perry R Cook 27 Aug '11

27 Aug '11

Hi all, Over the years I have done this for SKINI (Synthesis ToolKit Network Interface), which is a form of slightly extended textified MIDI. A couple of simple examples can be found at: https://ccrma.stanford.edu/workshops/dsp2008/prc/Week1Labs/ChucKModal/ Running the GUIModal script evokes the Tcl/TK wish interpreter, giving you a GUI with sliders and buttons. It pipes the output of that, which is SKINI, into the stdin of chuck running Modal.ck. The StdIn Class is called Skot (deprecated, should be called ConsoleInput), and the substring parser is called PRC (now called StringTokenizer). skinihak.c can read SKINI files with time stamps and dole them out (flushing it's stdout) to be piped into a SKINI-reading chuck program. So skinihak spain.ski | chuck Modal.ck will play that scorefile. In the directory I pointed you to, skinihak is Linux, skinihakMac is PowerPC, you can build what you like 'cause the source is there. For IntelMac SnowLeopard, without Rosetta, you can build one that works using something like: gcc -m32 -o skinihakMacIntel skinihak.c Enjoy!!! PRC

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Open call: Handmade Music Amsterdam
by Jonathan Reus 26 Aug '11

26 Aug '11

Dear ChucKists, For those of you in the Netherlands or Europe around the end of September, please see the open call below. It would be wonderful if some of you could come out and show off your ChucK-driven instruments! The open call is also available online here: http://patternsandpleasure.steim.org/2011/08/26/handmand-music/ Hope to see you there. Best, Jonathan */*// Open Call: Handmade Music Amsterdam * *As part of the Patterns + Pleasure Festival http://www.patternsandpleasure.com/ STEIM will host Handmade Music, Amsterdam on 28 September 2011 14:30 - 17:30 Frascati Theater, Amsterdam Submission Deadline: Tuesday 9 September 2011 Hosted by createdigitalmusic.com and STEIM; curated by Peter KIRN withTakuro Mizuta Lippit * *Attention, makers of things that make music!* Be part of an open laboratory, a science fair-style show and tell of work. We want to see your creations, including but not limited to: - Custom circuitry - New custom synthesizers - Creative controllers - Open source hardware and software - Audiovisual software - Original acoustic and electroacoustic instruments - Sound art/sculpture - Circuit-bent designs - Instruments and composition and performance tools made with game technology, mobile technology, Kinect cameras, and the like The essential element is that you've built something yourself, in hardware, software, or both. Please be prepared to show a self-contained presentation of your work. Some display/projection and amplification will be available, but we encourage you to bring your own displays and speakers if you can. We will setup works for show-and-tell style exploration, as well as brief (5-minute demos) and short (5-10-minute), variety style performances and jams. We'll also lead a discussion with artists and engineers, and encourage you to meet other makers and exchange ideas and techniques. We are unfortunately unable to provide expenses for travel, so you will need to provide your own transportation to and lodging in Amsterdam. All projects will be covered on createdigitalmusic.com. To apply please submit: 1. Your name, as you'd like it to be listed 2. Your project name 3. If applicable, a link to a project site 4. Photos of your project (a link to Flickr, Picasa, blogs, etc. is fine) 5. (Mandatory) Video and or audio documentation of your project in action (Vimeo, YouTube, SoundCloud, etc.) 6. Space requirements 7. Technical requirements (power / audio / safety concerns if applicable) 8. A brief description (two sentences is fine) of your project. 9. If you wish to propose a performance, please describe in short how you perform with your tool. 10. Your contact information, so we may respond The submission form is available online here: http://cdm.fm/pt99dq We prefer to capture information on the submission form, but if you have difficulty with it, please email peter(a)createdigitalmedia.net directly with the subject ‘STEIM HANDMADE MUSIC’

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Chuck Latency
by Kyle Hipke 24 Aug '11

24 Aug '11

I'm working on a project that requires low latency peak detection. But I'm struggling with the low-latency part. I'm not sure if there's just a problem with chuck, my code, or if my computer is slow. I'm on an Intel Core 2 Duo 2.13 GHz processor. The following code illustrates the problem: time chrono; Impulse i => dac; adc => Gain g => OnePole p => blackhole; adc => g; 3 => g.op; .9999 => p.pole; now => time start; 10::samp => dur peakPollRate; //ADJUST THIS .001 => float threshold; spork ~makeImpulses(); while (1) { if (p.last() > threshold) { <<< "peak at", (now - chrono) /ms >>>; .2::second => now; } peakPollRate => now; } fun void makeImpulses() { while (true) { 1 => i.next; .8::second => now; <<< "Impulse at ", (now - start) / ms >>>; } } This code uses an impulse as a metronome and listens to the adc through a OnePole filter for peaks above a threshold. Here's two ways to demonstrate the problem (you'll need speakers and a mic): 1. With headphones in, adjust the threshold as low as possible without picking up room noise (under //ADJUST THIS) then run the code. Make a percussive sound into your mic that coincides with one of the impulses, then kill chuck and look at the output. On my machine, it detects the peak ~200ms after the metronome, even though I made the sound immediately when I heard the metronome. 2. With speakers on, adjust the threshold and your speaker volume so that the Impulses are detected as peaks, but no room noise is. Run the program for a few clicks and kill it, then look at the output. On my machine, again, I get a ~200ms delay. Do other people have this same problem? Why is this happening?

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MIDI Synthesizer
by z＠chickenz.fr 24 Aug '11

24 Aug '11

Hi ! I'm currently having some fun with ChucK and my keyboard, and thought it would be nice to share my little experiments. It's a polyphonic synthesizer class that can easily be overridden. Here is an example: Gain g => dac; // we create the synthesizer Synth synth; // connect all its voices to the gain synth.connect(g); // set the device number 0 => int device; // start the synth synth.start(device); // and that's all. while(true) day => now; There, you have a basic synthesizer with some SinOscs that you can control with your little MIDI keyboard (or a virtual keyboard connected with jack, that's your business). There is 20 voices by default, which means you can press 20 keys at the same time (if you want to use your toes, for example). Now, you want to add a vibrato and a tremolo, and you want to control them with a potentiometer or a cursor. No problem ! First, get the identifier of the controls on your MIDI controller (with the mididump.ck script, for instance). Gain g => dac; Synth synth; // The default synth contains 3 lfos (low frequency oscillators), but you // can do what you want with it. The first one is automatically chucked to // the oscillators synth.connect(g); // This class contains some control handlers, and can be easily extended MIDIControls ctl; // First we want to connect a potentiometer to the first lfo's frequency, // and we want it to vary between 0 and 50. // My first potentiometer has the codes (176, 75) spork ~ ctl.handler_osc_freq(synth.lfo_1, 0, 50, 176, 75); // The next potentiometer will be binded to its gain // this way, the frequency will vary between f - lfo.gain and f + lfo.gain // where f is the frequency of the note pressed spork ~ ctl.handler_gain(synth.lfo_1, 0, 50, 176, 76); // Then, we are gonna add a tremolo // For two oscillators, it's easy to sync the output of the first to the // frequency of the other. But to sync an oscillator and a gain, you will // need a shred. Fortunately, I made one, it works like that : spork ~ modulate_gain(synth.lfo_2, synth.g); // The lfo_2 is now connected to the internal gain of the synth // And then, we bind two more potentiometers spork ~ ctl.handler_osc_freq(synth.lfo_2, 0, 50, 176, 77); spork ~ ctl.handler_gain(synth.lfo_2, 0, 7, 176, 78); // The synth is where it all happen, where the midi data is fetched and // handled. // We need to add our new bindings : synth.controls(ctl.ctrl); synth.start(0); while(true) day => now; Now, by extending Synth and MIDIControls, you do all kinds of fun things. One sinus oscillator per voice is a little flat, so you can change it to a Triosc : class TriSynth extends Synth { // We can change the envelope 80::ms => adsr_attack; .3 => adsr_sustain; 30::ms => adsr_release; // and the default oscillator type fun Osc get_osc() { TriOsc s; return s; } } And then, use it just like the Synth class. I also did a Synth with more than one Wave per Voice, there is an example in the source file, and I also did a little video (with a gruesome quality) here: http://www.youtube.com/watch?v=FqN11uGK-kI (also, plotting of the wave's shape with gnuplot) Finally, I did a looper (not with LiSa, I have channels and sample rate issues on my computer) that can play some tracks in a loop and do stuff to it. Unfortunately, there is no recording possible for the moment. Silly video example here (might cause ear bleeding): http://www.youtube.com/watch?v=QRduB9wbj8w There is lots and lots of possibilities to improve it, and I won't be able to think about every one of them. I'm also struggling with the public class system and trying to turn this file into a library. My little project could really use some more documentation, but my english is quite french, so to speak, therefore I'm afraid to induce more confusion than clarity, but I will try. The code : https://bitbucket.org/synzack/chuck/src/6d447a4651b4/midi.ck The repo : https://bitbucket.org/synzack/chuck/ Hope you like it, z^ck

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something new to think about.
by tempjayren＠gmail.com 24 Aug '11

24 Aug '11

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I'M TRYING TO PICTURE THE CODE TO IMPLEMENT THIS, THOUGH MY BRAIN HURTS, SO I CAN'T. THIS IS SIMILAR TO THE TUTORIAL EXAMPLE THAT IS DESCRIBED AS SOUNDING LIKE OLD SCIFI COMPUTERS. WHERE WE USE A SINOSC AND PLAY WITH THE RANDOM AND THE FREQ. THIS WILL RUN FOREVER, ON FIRST RUN IT WILL GENERATE A NUMBER, SAY 200, IT WILL PLAY A SHORT 200 FREQ FOR SOME SHORT LENGTH, SAY 100MS. ON ITS SECOND RUN, SAY IT GENERATES SOME OTHER NUMBER LIKE 50, THIS IS A BAD NUMBER IN THIS CASE BECAUSE IT IS LOWER THAN 200. SO IT TOSSES OUT THE 50 AND PLAYS ANOTHER 200 FREEQ 100MS BURST ON THE SINOSC. THIRD RUN IT USES SAY 300, THIS IS OVER 200 AND NOT 200 ITSELF, SO IT USES THIS, PLAYS THE NEW TONE. 4TH RUN, 250, NOPE CAN'T USE THIS THE NUMBER HAS TO BE 300. 5TH RUN, REPEAT. - --- SKIP AHEAD --- $TH RUN, 10000 PLAYS THE FREQ AT 100MS OF COURSE, THEN REVERSES THE PROCESS. #TH+1 RUN 9000 LESS THAN 10000 SO WE CAN USE THAT JUST FINE. #TH+2 RUN, 9050, OOPS, CAN'T USE THIS SO WE USE 9000. - --- REPEAT UNTIL WE WGT TO 50 ON THE FREQ, WHERE THE WHOLE THING STARTS OVER AGAIN. -- TERRIBLY SORRY ABOUT THIS, I'VE JUST NOTICED MY CAPSLOCK IS DOING AN ODD THING IT SAYS IT IS OFF, THOUGH IT APPEARS TO BE ON, GROWL, NOT HAPPY plus, i don't feel like retyping all of this, so no i'm not shouting at anyone. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.17 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJOU/kCAAoJEIaKvi7tbzRH0aAH/jzSFyLg/XNvwE8ewjnlEs51 1InT5AmBAb/7XZTtp8xBVyfuBi5AQQxKomNkJm9ZqZj/yut7jAgh1oFRbLITcxeu B8UOjzQcjv03s6SMPoFQk1jsZgPm52IjJHraLMTZM/cYZcnsJGg/zpTlcFImGbbi yPd6z6jML1xzmE4J63Aw5nm9/9yD/x0/fugbEHKVmdu3VJRpJtn+kVzTosc5+eT4 kNNN8jXP3AK0oKRqd848EZ/T7bv9DQS+HaErzqkcFv0JVNdd8tzkAwJ74ANxhygS 5cojoDpGQgpl/+03veWICG2qd+DMxDvB9toVRryJn4Y/xHoRckoOain+UBy9mSM= =Jtkw -----END PGP SIGNATURE-----

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Re: [chuck-users] need help installing chuck
by Woozy 24 Aug '11

24 Aug '11

ive been interested to try out chuck as a programming language for my monome, but i seem to be having some difficulties with the installation. im on a macbook pro 10.6.8 btw. i downloaded the chuck executable as well as miniaudical. i opened up the chuck executable which opened up a chuck folder with a bunch of things in it, and i stored them both in my applications folder. in the chuck manual, theres a section i included in an attachment that talks about replacing the x's with the actual "directory name". what is a "directory name" and how do i find out what my directory name is? id really like to get this going, thanks in advance for any help! hopefully i ll be chucking soon. Torsten Schwab Marketing GmbH Emanuelstr. 3, 10317 Berlin Deutschland Telefon: +49 (33) 5310967 Email: woozydude(a)gmail.com Site: http://flug.prexxis.de/

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here's an idea
by tempjayren＠gmail.com 22 Aug '11

22 Aug '11

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 something occurred to me, i don't know how this would work, or even if it would all that well. basically, the idea is a file containing notes, notelengths, octaves, and timing commands, then having a .ck interpreter read this file and play it, i'm picturing a language similar to what basic had available for audio, with extensions of course, because we can do rests, that didn't do rests as i recall. and we can include different basic sound generators, sinosc sqrosc etc and another small set of symbols to change those from within the music file. so, there'd be a .ck file, made to interpret this new language, let's call it an .imus (interpreted music file) the .ck file runs, reads the .imus file, and plays that. we could also tell it at the beginning of the .imus file, if we wanted to play it through the speakers, or record to output-of-imus-file.wav. anyway, just an idea to kick about. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.17 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJOUjP6AAoJEIaKvi7tbzRHpc4H/27v/YoSStk4O9X0dQYrzGzx SnYzFa7XNCacraZkX45GXVsho5rydkt7mKdb1gGo/xT/FhJccZgKThbQaDUJKg4W 7CH/Ut9QNVILajkPCNH9FBcOoq9HuZA6b6hOwKybMkaNRGFvGHqzEyj9U0QmPQfc BDnxF4vbX++cCNHoSEohErhKwrp0VLCi/8G/Fn3DMpcL4pJTy7cEuWckoCy2G/op 1GBk0ozLyS+pe9jawTk8F6UxlbFEKUTPXFHxMAZCQOBO+RHIESdjXmJ9OSx3IUMQ dMe+Db1R+IXd8Vz9lkDcTAEgDqcLbK7vwt4/VQPe5hGGNCm2fbH6ZIo6F+yttCE= =/8Qt -----END PGP SIGNATURE-----

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muylti window chuck
by tempjayren＠gmail.com 19 Aug '11

19 Aug '11

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 i must have broken something again. the instructions tell me to use --loop, then i can change things and add or remove files with + or - that's all good, and it apparently works. what doesn't work is sound. if the file plays when i run it with chuck filename.ck, and all kinds of fun sound things happen, doing the same with --loop running in one dos box, and chuck +filename.ck in another dosbox should make all kinds of fun audio things happen as the tutorial suggests, however, no audio things happen at all. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.17 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJOTOzWAAoJEIaKvi7tbzRHy7gH/jfuvh+WafRZAOwU78syFQ54 MugDE+lXdr1edggYP+qEkqTKr6gEOb1RSL6F6fFG+9W/EV7z+Kx+fzgaeejAJemx 5qhK79pu9jcp/NMKtgQChAo8rBhey7c/aKIc4BMshFIDVF/ryi07k+pM0UkhXSvU LadiUh3PWczR8SBqACuXQd28/Be4F3NPqmkXm0YrmrNdJUO1xuxx4KwOVajLAZdS zTIh3ICw1c4RLe0YNX3Q/bp3s/tRjVLefDDgCZBAeFPCbftPMgND9Dtd1dtg+ink 1gWtNg4rI//0H/YzoBmetmUlEYvmgBgQqaDd2OrluooH8USm0H6ejX8X+e6JIYg= =pSCw -----END PGP SIGNATURE-----

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need help installing chuckfrom Sabrina
by Sabrina Friedman 19 Aug '11

19 Aug '11

ive been interested to try out chuck as a programming language for my monome, but i seem to be having some difficulties with the installation. im on a macbook pro 10.6.8 btw. i downloaded the chuck executable as well as miniaudical. i opened up the chuck executable which opened up a chuck folder with a bunch of things in it, and i stored them both in my applications folder. in the chuck manual, theres a section i included in an attachment that talks about replacing the x's with the actual "directory name". what is a "directory name" and how do i find out what my directory name is? id really like to get this going, thanks in advance for any help! hopefully i ll be chucking soon. Sabrina Friedman Billige Flüge Marketing GmbH Emanuelstr. 3, 10317 Berlin Deutschland Telefon: +49 (33) 5310967 Email: utebachmeier(a)gmail.com Site: http://flug.airego.de - Billige Flüge vergleichen

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