October 2014 - chuck-users - lists.cs.princeton.edu

Casting behaviour
by Gonzalo 17 Oct '14

17 Oct '14

I have this (unexpected?) behaviour when casting. I can cast a object to its parent class, but the methods that get executed are still their own (and viceversa). I.e.: ---------------------------------- public class Parent { fun void test() { <<< "Parent" >>>; } } class Child extends Parent { fun void test() { <<< "Child" >>>; } } Parent p; Child @ ch; p $ Child @=> ch; ch.test(); // prints Parent Child ch2; ch2 $ Parent @=> p; p.test(); // prints Child ---------------------------------- Is this intended behavior? What's the point of casting then? I might describe too what I'm trying to do, maybe there's a better approach. I have a .create method in Parent that returns a Parent object, and I wanted to create that same method in Child, but I can't do it because the arguments are the same, and it won't let me overwrite the method when only the return type changes. So to create a child with the .create method, I do this: Parent.create(...) $ Child @=> Child ch; Which works, but then it still behaves as a parent, so it defeats the whole purpose. Thoughts? Gonzalo

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replace multiple shreds simultaneously
by Peter Lutek 17 Oct '14

17 Oct '14

greetings! it seems there's no command-line option for simultaneously replacing multiple shreds, right? i.e. something like this isn't implemented: chuck = 1 firstreplacement.ck 2 secondreplacement.ck did i miss something? if it's not possible, what are some good workarounds? (on linux, with JACK) i guess there's this: chuck = 1 firstreplacement.ck & chuck = 2 secondreplacement.ck ...but that's probably not sample-accurate and has a bunch of extra keystrokes! :) thanks much... cheers! .pltk. -- Peter Lutek improvising musician in Toronto, Canada http://peterlutek.com

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Miniaudicle not showing Preferences menu
by wolfgang gil 13 Oct '14

13 Oct '14

And getting the following message out the console window (on a mac osx 10.6.8) [chuck]: system error: (CoreAudio unknown error) getting sample rate info... It happened suddenly. Not sure to what triggered it... I upgraded the miniaudicle on my computer but the problem persisted. Help? Please? Thanks in advance -- Wolfgang Gil IT Specialist, Sound Research Group coordinator EYEBEAM 34 35th Street, Unit 26 Brooklyn, NY 11232 m. 1-954-415-3613 wolfgang(a)eyebeam.org www.eyebeam.org www.wolfganggil.com Contour Editions - Installation Curator/Software Developer http://contoureditions.com/pages/about.html

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questions about the Bowed UGen
by Daniel Chapiro 12 Oct '14

12 Oct '14

Hi - I am using the Bowed UGen, and after reading the docs, trying to hear what's going on, and looking at Chuck's src, I still have some questions: (1) rate: Chuck complains that the rate method is not valid for Bowed. However, it's mentioned in some docs, and the source code has an ADSR inside, whose rate is set by noteOn/Off (but not by start/stopBowing). Also, this ADSR has reasonable decay and sustain values, but they are fixed. Is there any way to at least set the rate from Chuck code? (2) volume: it is a multiplicative factor, completely independently of whatever amplitude one sets with start/stopBowing set, right? (3) start/stopBowing: does the model have a transient, during which the string is vibrating with a different spectrum than in steady state? If not, to control the attack/decay, should I leave it bowing constantly, and control the attack/decay by adding an ADSR after Bowed, which would "gate" the sound? (4) in STK there's an asymptotic decay - is there anything like that in Chuck? (sometimes one may want a dampened, quick stop, but others one may want to let the string decay asymptotically, just as with plucked strings, regardless of having enertgized the string with a bow). Thanks! Daniel

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Forgetting parenthesis in function calls yields no error
by Stefan Blixt 10 Oct '14

10 Oct '14

Hello list! I just spent a little time scratching my head over these little functions: fun void startRecording() { <<< "Record! ", index >>>; true => lisaLeft.record; true => lisaRight.record; } fun void toggle() { !active => active; paintActive(); if (active) { startRecording; } } Everything seemed to be in order, I added a lot of print statements, and could for the life of me figure out why the startRecording function wasn't executed from toggle(). There was no error message, everything seemed to be in order. Then I peered more closely and saw that I had forgotten to put parenthesis in the function call: startRecording(); After that everything started working. My question is: shouldn't a function name all by itself result in an error of some kind? Cheers, Stefan Blixt -- Release me, insect, or I will destroy the Cosmos!

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