November 2007 - chuck-users - lists.cs.princeton.edu

'if' statement parse error...?
by Jascha Narveson 13 Nov '07

13 Nov '07

I'm getting a parse error on an 'if' statement, but I feel like it should work - in fact, i have perfectly fine 'if' statements elsewhere in a larger piece of code i'm working on which work exactly the way i'd expect them to. For some reason, though, an innocent looking 'if' statement in a different part of my code won't compile. To test if i wasn't just missing something, i carefully typed out a simple 'if' in a fresh document, after rebooting the program. Does anyone else get a parse error when running this simple simple thing in miniAudicle? thanks, j ---code---- while (true) { Std.rand2(1,6) => int i; <<<i>>>; if (i > 3) {<<<"true">>>} else {<<<"false">>>}; 1::second => now; }

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miniaudicle no sound on gutsy
by jim 13 Nov '07

13 Nov '07

Hi I've compiled miniaudicle 0.1.3.8 on ubuntu gutsy with alsa. Using the simple code SinOsc s => dac;2::second=>now; doesn't output anything. But it works using chuck in command line. What's the problem? Thnaks

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wiimote=>chuck on linux
by Graham Percival 13 Nov '07

13 Nov '07

Hi all, I'm trying to get input from a wii controller into ChucK. One option is to use OSX+darwiinOSC to send OSC messages to chuck, but this requires OSX. There are a number of wii libraries for Linux; does anybody know if they can communicate directly with ChucK's hid input? So far I haven't been able to find a linux wii driver that sends OSC messages. Cheers, - Graham

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Time logic
by Juan-Pablo Caceres 11 Nov '07

11 Nov '07

Hi there, I have another question concerning time logic. The following 2 examples are similar: // 1) while (true) { <<<"HELLO">>>; 1::second => now; } // 2) while (1::second => now) { <<<"HELLO">>>; } So the question is, is the second case using some syntactic sugar? Because conceptually it doesn't sound right to me. Maybe the chuck gurus out there can make more sense of it? Thanks! JPa.

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recording Chuck output once sound has started
by Jascha Narveson 11 Nov '07

11 Nov '07

How do people like to record audio from ChucK once it has already started running? I was just playing with an interesting audio- processing patch and wanted to record the output, and thought maybe routing ChucK through Jack would work, but i didn't have any luck with that. cheers, jascha

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mouse up/down controlling signal path
by Jascha Narveson 11 Nov '07

11 Nov '07

hello again, chuckists - I'd like to alter signal flow in response to input from HID devices. In this small example, i want mouse down to result in reverb, and mouse up to result in dry signal. The problem is that the reverb persists after the first mouse down - i tried unchucking in the mouse up "else if" statement, but that didn't work... thanks, all, j ----code---- adc => dac; NRev rev; Hid hi; HidMsg msg; if( !hi.openMouse( 0 ) ) me.exit(); <<< "mouse '" + hi.name() + "' ready...", "" >>>; while( true ) { // wait on event hi => now; // loop over messages while( hi.recv( msg ) ) { if( msg.isButtonDown() ) { <<<"down">>>; adc => rev => dac; } else if( msg.isButtonUp() ) { <<<"up">>>; adc => dac; } } }

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SinOsc => Pan2.pan?
by Michael Heuer 10 Nov '07

10 Nov '07

Hello, I would like to chuck the output of a SinOsc into the pan parameter of a Pan2 ugen. Seems like that should be possible but I haven't figured out how to do it yet. Thanks, michael

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Removing all the shreds from the command line chuck
by Juan-Pablo Caceres 10 Nov '07

10 Nov '07

Hi, Is there a way to remove all the Shreds from the command line chuck? Or the only way is to do something like: %> chuck - 2 3 4 5 6 7 Thanks for you help! JPa.

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stupid n00bie question: part IV
by AlgoMantra 09 Nov '07

09 Nov '07

Hm, happy diwali greetings from India chuckers! So. Lets say I'm shaping a curve, which is the frequency graph of a sound wave, using pygame, or some kind of GUI. So what I possibly have are two things: 1. a string of coordinates that forms the curve. 2. a parametric equation that represents the curve. What is the easiest way in ChucK, by which I can play/generate this sound in case 1) and 2). See? It's getting less stupid everyday :) (eh, Kassen?) regards, dj fadereu ------- -.- 1/f ))) --. ------- ... http://www.algomantra.com

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multichannel audio
by David Birchfield 07 Nov '07

07 Nov '07

hi all, haven't yet found an answer in the archive, but apologies in advance for the newbie question: I have a motu traveler on mac 10.4.10 and would like to use the multichannel capability. When I run the 'n.ck' example script it returns that the device has only 2 channels, and I get a NullPointerException when I try to force the issue by writing to dac.chan(2). Is there a way to help Chuck see the additional channels on my device? thanks!

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