October 2005 - chuck-users - lists.cs.princeton.edu

feature request: block comments
by Graham Percival 21 Oct '05

21 Oct '05

// instead of // commenting out // each line // of part of // your program %{ it would be really nice if we could use block comments to do it all at once. (although %{ %} might not be the best symbol to use) %} Cheers, - Graham

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Envelope.time (repost)
by Graham Percival 21 Oct '05

21 Oct '05

Greetings, The docs don't say what Envelope.time (from STK) is measured in -- they just says that it's a float. From the code below, I determined that when .target is 0.5, it measures 500::ms (in other words, "2.0 => e.time" takes 1 second to reach the target); when the target is 0.25, it measures 250::ms. Is this proper behavior? I was expecting the time to be... well, more absolute. :) ie 1.0 would mean 1.0 seconds or 1.0 ms. If this _is_ prope behavior, could it be documented? BTW, the example file "sixty.ck" is missing from the 1.2 and 1.2.0.1 source tarballs. Cheers, - Graham Percival ---- envtest.ck 100 => int TIME; sinosc s => Envelope e => dac; 220 => s.freq; 0.5 => e.target; 1.0 => e.time; 0 => int i; while (true) { <<< i*TIME, e.value() >>>; i++; if (e.value() == e.target()) break; TIME::ms=>now; }

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std.abs always does floats
by Graham Percival 21 Oct '05

21 Oct '05

Could std.abs detect if the variables are ints, and return an int if so? 3 => int intfoo; 2 => int intbar; std.abs(intfoo-intbar) => int foobar; result: [foo.ck]:line(3): cannot resolve operator '=>' on types 'float' and 'int'... It's not a big deal to add the $int, but it surprised me when I first encountered it. Cheers, - Graham

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feature requests: included directories and .chuckrc
by Graham Percival 20 Oct '05

20 Oct '05

Since you guys are implementing neat little features so quickly, here's another -- the ability to include directories to search for patches. ie $ chuck -I ~/chucklibs/ foo.ck rec.ck This searches the current dir for foo.ck and rec.ck; if it doesn't find it, then it searches in ~/chucklibs/ This is much easier than doing $ chuck foo.ck ~/src/chuck-1.2.0.2/examples/basic/rec.ck It would also be great if chuck could get configuration details from ~/.chuckrc (such as sample rate and included directories :) Cheers, - Graham

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ChucKML
by Nelson Ferraz 19 Oct '05

19 Oct '05

Hi! I wanted to use ChucK to play some wave files in sequence, so I wrote a small script to read a XML file and generate the ChucK code for me. I called it "ChucKML". Here's a sample ChucKML file: <chuckml> <wave src="wav/snd1.wav" repeat_every="3::second"/> <wave src="wav/snd2.wav" start_after="12::second" repeat_every="6::second"/> <wave src="wav/snd3.wav" start_after="36::second" repeat_every="12::second"/> </chuckml> Sample usage: $ chuckml sample.xml > sample.ck $ chuck sample.ck (The first command generates a .ck file, and the second command plays it.) This is a simple prototype, but I thought someone will find it useful. Perhaps it could be used to introduce ChucK to anyone who can write HTML? Nelson -- Nelson Ferraz GNU BIS - www.gnubis.com.br

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feature request: including files
by Graham Percival 19 Oct '05

19 Oct '05

It would be great if ChucK could include other .ck files. I know you can do machine.add("foo.ck"), but it would be great if we could do it with non-shreds as well. For example, I could have a bunch of functions which I could then include in other projects. You can't machine.add a fun float changevalue ( float foo ) { ... return bar; } Technically speaking, whatever.include("foo.ck"); would simply insert the contents of foo.ck into the original file at the place where whatever.include() was called. Cheers, - Graham

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Heartbeat
by Nelson Ferraz 19 Oct '05

19 Oct '05

I was wondering if it would be possible to use ChucK to script wave files, and I found the answer in one of the "towers of annoy" example -- yes, it's possible. Here's my first ChucK program, which I called "hello_wav.ck": // the sound samples sndbuf my_sample; // load files "wav/Heartbeat Bass.wav" => my_sample.read; // set gain .5 => my_sample.gain; // play my_sample => dac; 3::second => now; It worked just fine. Now, I'd like to play the heartbeat sound "ad infinitum"... I tried this, but it doesn't work: while (1) { my_sample => dac; 3::second => now; } Any ideas?

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audicle
by James Baker 19 Oct '05

19 Oct '05

whats the current status of this project? i understand the 'read when its ready' motto, but how about some info. sorry to hassle but im eager to try it out ;) oh and the 1.2.0.1 release of chuck is very neat. cheers, james

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Help with arrays?
by Vassili Slessarenko 18 Oct '05

18 Oct '05

Nobody really uses jankyteeth/soup anymore. SO i figured I'd ask here: I can still not quite figure out how to do random choice wihtout replacement... I seem to have gotten one of the ways of doing it, but need help to make it not crash the spork. Here is the actual code. After all the effects it tries to randomly select pieces out of a sound file and then plays them at random speeds, etc. so you get a very weird reconstructed sound... feed it any sound file that the soundbuf class understands. The main part I'm having trouble with is the main while(true) loop. Could someone help me out to make this thing work without crashing chuck? click here: http://urbanplexus.net/reconstructor.ck

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int/float conversion oddity (48.0000 = 47)
by Graham Percival 11 Oct '05

11 Oct '05

std.mtof(std.ftom(48)) => float foo; <<< foo >>>; foo $ int => int bar; <<< bar >>>; std.mtof(std.ftom(48)) $ int => int baz; <<< baz >>>; On OSX 10.3.9, using chuck 1.2.0.1, this results in: 48.000000 :(float) 47 :(int) 47 :(int) Cheers, - Graham

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