December 2010 - 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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The ChucK Method Book
by Zed A. Shaw 28 Jan '11

28 Jan '11

Hi folks, long time lurker, infrequent poster. I've recently finished a book for Python and I'd like to do a similar one for ChucK. The Python book is "Learn Python The Hard Way" and it's written similar to a guitar method book: http://learnpythonthehardway.org/ What I'd like to do next is a "ChucK Method Book" in a similar style, but actually make it more like a real method book for an instrument where the student is learning to "play chuck" like they would an instrument. If I were to do this, what do you think it should include? Do you think it's a good idea? Have you tried teaching ChucK? Thanks! -- Zed A. Shaw http://zedshaw.com/

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chuck posibilities at sample level
by ronni montoya 04 Jan '11

04 Jan '11

Hi, im new in this list, i was using supercollider before, somebody told me about something about the posibilities of chuck for making sample level operations. Can anybody explain me about this? Do you think chuck has new posibilities related to sample level synthesis? that cannot been done with sc3? can anybody explain this further? thanks in advance R.

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Selecting Driver
by Tom Aizenberg 01 Jan '11

01 Jan '11

Hi all, Is it possible to select which driver for the soundcard I want to use? Like in Reason or Logic you can select the ASIO driver and change the buffersize... Any help would be appreciated! Greetings, Tom

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newbie envelope follower question
by daniel gomez 22 Dec '10

22 Dec '10

Hi guys(sorry that i sent this same email to the chuck list and not the chuck-users)Im just getting started this week in chuck. Been reading the documentation and following the examples, but im stuck with trying to start an envelope that contours the filter frequency just when i hit any key. I have this patch (below) that (supposedly) contours the filter and the oscilator at the same time, but i dont get what is wrong cause it is not working. It seems as if the envelope is sliding but it is not being updated when the amplitude envelope is on. Im sorry if this is too obvious but have not found a way to do it. ThanksHid entrada; HidMsg mensaje;0 => int device; if( !entrada.openKeyboard( device ) ) me.exit();//El patchSawOsc o1 => LPF f=> Envelope e1 => dac;Step stp => Envelope e => blackhole;1 => stp.next;400 => e.value;800 => e.target;2 => e.time;o1.gain (.2);0.020 => e1.time;o1.freq(200);while (true){entrada => now;e.last()+200=> o1.freq;e.last()+200=> f.freq;while( entrada.recv( mensaje ) ) //cuando 'entrada' reciba un 'mensaje'{if( mensaje.isButtonDown() ){1=>e1.keyOn; 1=>e.keyOn;}if(mensaje.isButtonUp()){0=> e.keyOn;0 => e1.keyOn; }}}

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Circular references in class definitions
by Jordan Orelli 08 Dec '10

08 Dec '10

in short: Is there any way to have two separate classes that reference one another in their definitions? I want objects of type A to encapsulate a collection of objects of type B, but for objects of type B to also be able to hold a reference to their containing object. Alternatively, I could use an event system where the child objects (class B) raise an event that the containing object (class A) listens to. I'm not entirely familiar with ChucK's event model yet, though. Here's the full story of the problem: I'm currently working on an instrument for the Novation Launchpad using ChucK. The rest of my explanation assumes you have a basic familiarity of the layout and functionality of the Novation Launchpad. The way it's structured, I have one class called Launchpad that is responsible for all data and functionality common to an individual device. It contains a collection of 8 LPIs (Launchpad Instruments). At any given time, one LPI on the device is in focus; interaction with the main grid and rightmost column controls that LPI. The topmost row selects between the 8 LPIs. The Launchpad object's main jobs are to allow the user to switch focus between LPIs, and to observe MidiIn messages from the physical device. So the Launchpad class handles and routes incoming data. The LPIs are the actual synthesizers; they manage (most) outgoing data. The problem I'm faced with is that the individual LPIs don't have a reference to the Launchpad itself, so I'm having trouble tracking the state of the MIDI lights in ChucK. This is needed to reduce the number of MIDI messages that I send to the device; ultimately I want to prevent any MIDI message that would tell the device to turn off a light that's already off. These messages have been creating a bottleneck, and under certain circumstances introduce unacceptable delay. You can view the source, and if you have a Launchpad check it out and play with it here: https://github.com/jordanorelli/chuckpad -Jordan (this is my first Github project, so please let me know if I have it configured wrong and you can't actually checkout the project; it's intended to be public)

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Chuck Dynamic Linking?
by mike clemow 08 Dec '10

08 Dec '10

Dear Dev'rs: >From the documentation here: http://chuck.cs.princeton.edu/doc/program/stdlib.html "ChucK Standard Libraries API these libraries are provide by default with ChucK - ****new ones can also be imported with ChucK dynamic linking (soon to be documented...).***" (emphasis mine) Does "soon to be documented" mean that the functionality already exists in the current version or in CVS or at all? And the obvious follow up: If it's in the current version or CVS, can we have a hint? Is there a secret Chuck pre-processor? Cheers, Mike -- http://michaelclemow.com http://semiotech.org

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Fwd: [livecode] Call for proposals: CMJ live coding videos
by Kassen 06 Dec '10

06 Dec '10

Fellow ChucKists, Bellow is a message from Alex McLean that was posted to various related lists but not (yet) here. It might be interesting to some? I'd like to add that I personally like seeing completely improvised performances by people trying to come to grips with new ideas at least as much as slick pre-planned presentations. I'd argue that the former have a bigger chance of sharing "public thought" than the latter. Yours, Kas. ---------- Forwarded message ---------- From: alex <alex(a)lurk.org> Date: 3 December 2010 18:21 Subject: [livecode] Call for proposals: CMJ live coding videos To: livecode(a)toplap.org Hi all, Some exciting news I think -- Thor, Nick and I have been asked to get together some live coding videos for a forthcoming issue of Computer Music Journal. We've put together a formal call here, feel free to share it around: http://tinyurl.com/dvdcmj The ideal is to have all live coding environments represented, including experimental ones, along with all livecoders, active, dormant and lurking. So please throw in a proposal - it doesn't have to be fully formed or binding at this stage. Unfortunately there isn't any funding for any of us, but we hope this will be a really good project to be part of, and contributors would keep full copyright over their work. The deadline for brief proposals is 20th December, with notification hopefully by the end of the year. The deadline for submission of videos will be 1st April. Feel free to bring up ideas for collaborative videos here if you wish... Cheers!

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New user, first question
by Chuck Ivy 02 Dec '10

02 Dec '10

Hello, chuckers. I'm new to the language and am working on my first project (code to perform Terry Riley's "In C"), and I've got two related questions: First, is there a way to regulate, compress or limit the cumulative volume of shreds? Through the tutorial/documentation, I saw the .gain operator, but I'm thinking that I'll have a variable number of shreds, so figuring out the cumulative gain cuts in advance wouldn't make sense, and really, I'll mostly be in danger of clipping when the additive waves are in phase and frequency, but perhaps not elsewhere, but I wasn't seeing any obvious unit analyzers for compression or gain control. Second, and parallel to that, is there a way to globally change the gain of the master dac for dynamics when the generators are in different shreds? Thanks... I'm just getting started, and I'm sure I'll have more interesting questions down the line once I've gotten beyond my simple note player project. -- *Chuck Ivy,* research artist chuckivy(a)gmail.com 323.842.0357 http://www.chuckivy.com/

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