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eChucK Update
by Les Hall 10 Dec '09

10 Dec '09

Hey fellow ChucKists, In the last eChucK update I made a joking reference to ChucK and eChucK going out on a date together because I was interfacing the first working eChucK prototype to ChucK. Dropping the silly personification here, I am happy to report that the experiment was a success. I added code to an existing Boolean Sequencer program so that it sent control signals to the eChucK board via the left and right channels of the headphones out jack. With a little bit of added circuitry, the eChucK board properly responded to the ChucK output signals. The result was nice enough that I injected vocals into the eChucK board and controlled the buttons and sliders to create guitar and percussion sounds with interesting musical qualities. I then did a couple of one-hour internet radio shows (called "Inventor's Inventions) on the electro-music station. These two shows are available for listening in the electro-music radio archives which reside in the "Streaming Radio Station" sub-forum of www.electro-music.com (nearby where the ChucK forum is). The very latest news is that the board house (E-TekNet) has manufactured the first run of eChucK Karplus Strong circuit boards and UPS is scheduled to deliver them to my door tomorrow. Nine of the ten boards are spoken for and I expect to sell the last remaining one sometime soon. Some of the boards are sold bare, and some are to be assembled by myself for the customers at a reasonable cost. The bare boards sold for $21 + shipping ($5 US, $10 International) each. Also in the works is the companion circuit board, a Boolean Sequencing board which creates complex musical sequences from a simple logic matrix of 6x8 DIP switches. The designs are such that the BS board attaches to the top of the KS board with standoffs, forming a battery-powered eChucK "brick" suitable for use by a performing artist or studio artist. In addition to the stand-alone brick-style operation, both boards are designed to be used in a modular synthesizer either separately or in conjunction. Overall, the response from the community has been quite positive. One modular synthesizer customer said that it would require three to five modules to do the job of a single KS board, so if you want to do guitar or percussion sounds via Karplus Strong on a modular synthesizer the value is significant. Some people have voiced interest in eventually (as the design evolves) purchasing four or more KS boards or BS+KS board pairs so that they can create songs with multiple voices (ie: 2 guitars and 2 drum types). Another person would like to create guitar chords by using a few KS boards, one for each string of a chord. So anyway, that's the update. Progress continues and it's a really fun thing for me to be doing, so I'll keep at it. Your comments, suggestions, and questions are welcome as always. Les

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miniAudicle Installation Error
by Les Hall 10 Dec '09

10 Dec '09

Hi folks, I just tried to install miniAudicle 0.2.0 (gidora) on my eMac and got the following error: The following disk images failed to mount miniAudicle-0.2.0a.dmg no mountable file systems I'm running OSX 10.3.9, which is kind of old. I cannot upgrade my OSX because the SuperDrive failed (for the second time), and besides I'm not to keen on paying Apple "rent" to use my eMac. I say "rent" because their OSX upgrades cost $129 and come out every 18 months or so, resulting in a "rental" payment to Apple of $7 per month. This is unacceptable to me so I cannot and will not upgrade my OSX. Is this decision also locking me out of miniAudicle upgrades? Thanks for your reply. Les

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Problem with mixed float int lists
by Hans Aberg 10 Dec '09

10 Dec '09

ChucK does not admit explicit lists with numbers bot having and not having the decimal point, as in the example below. The problem is really that I made a program that writes tuning data to a file, which then should be pasted back into a .ck file. If the float value has not fractional part, 'chuck' writes it without decimal point. For example, it writes 440 Hz not 440.0 Hz. The first idea would be have 'chuck' always writing floats with a decimal point. But if the tuning data comes from some other source, it may not have a decimal point. One then ends up editing this data by hand, which is cumbersome. So I think 'chuck' should be able to convert explicit mixed float-int lists to float[]. There might also be some floats formatting capabilities. Hans ---- float_int_list.ck ---- [0.0, 1.0] @=> float as[]; // OK. [0, 1.0] @=> float bs[]; // array init [...] contains incompatible types... fun void f(float xs[]) {} f([0.0, 1.2]); // OK. f([0, 1.0]); // array init [...] contains incompatible types... f([0, 1]); // argument type(s) do not match: --------

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initialization of static variables
by Robert Poor 09 Dec '09

09 Dec '09

Gang: I now understand a bit more about initialization of static variables -- more accurately, about execution of top-level code -- and while it's not earth-shattering, I thought I'd pass it along. It may avoid some astonishment. The rules are simple, but are different than I thought: -- top level forms INSIDE a class definition are executed every time an instance of that class is created. -- top level forms OUTSIDE of a class definition are executed once when the file loads. To see the implication on initializing a static variable, consider the following: ===== file: t1.ck public class Statix { // UNO is set with to new value at every call to 'new Statix' static Object @ UNO; (new Object) @=> UNO; // DUE is set once after the first call to 'new Statix' static Object @ DUE; if (DUE == null) (new Object) @=> DUE; // TRE is set once when the file is loaded (see below) static Object @ TRE; <<< "at a: UNO=", Statix.UNO, "DUE=", Statix.DUE, "TRE=", Statix.TRE >>>; } <<< "at b: UNO=", Statix.UNO, "DUE=", Statix.DUE, "TRE=", Statix.TRE >>>; (new Statix) @=> Statix.TRE; <<< "at c: UNO=", Statix.UNO, "DUE=", Statix.DUE, "TRE=", Statix.TRE >>>; ===== file: t2.ck <<< "at d: UNO=", Statix.UNO, "DUE=", Statix.DUE, "TRE=", Statix.TRE >>>; new Statix @=> Statix @ _t1; <<< "at e: UNO=", Statix.UNO, "DUE=", Statix.DUE, "TRE=", Statix.TRE >>>; new Statix @=> Statix @ _t2; <<< "at f: UNO=", Statix.UNO, "DUE=", Statix.DUE, "TRE=", Statix.TRE >>>; ===== the output: % chuck t1.ck t2.ck at b: UNO= 0x0 DUE= 0x0 TRE= 0x0 at a: UNO= 0x5e5aa0 DUE= 0x5e5af0 TRE= 0x0 at c: UNO= 0x5e5aa0 DUE= 0x5e5af0 TRE= 0x5e6670 at d: UNO= 0x5e5aa0 DUE= 0x5e5af0 TRE= 0x5e6670 at a: UNO= 0x5e6ba0 DUE= 0x5e5af0 TRE= 0x5e6670 at e: UNO= 0x5e6ba0 DUE= 0x5e5af0 TRE= 0x5e6670 at a: UNO= 0x5e6c00 DUE= 0x5e5af0 TRE= 0x5e6670 at f: UNO= 0x5e6c00 DUE= 0x5e5af0 TRE= 0x5e6670

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background music
by Tom Lieber 07 Dec '09

07 Dec '09

could you guys make this a little better for me? one file max tho. thx 100::ms => dur d; Step s => dac; 0.1 => s.gain; Moog w => dac; 0.1 => w.gain; 1 => w.noteOn; Moog w2 => Envelope env => dac; .2 => w2.gain; 1 => w2.noteOn; d => env.duration; 1 => env.keyOn; fun float warble() { return Std.rand2f(2.5/1.01, 2.5*1.01); } fun void sweep(float freq, dur d) { w.freq() => float start; for(0 => int i; i < 10; i++) { (i / 10.) * (freq - start) + start => w.freq; w.freq() * warble() => w2.freq; d / 10. => now; } freq => w.freq; freq * warble() => w2.freq; walk(env.target(), .0, 1, .3) => env.target; 1 => env.keyOn; } fun void yay() { d * 4 => dur e; while(true) { Std.rand2(1, 2)::e => now; spork ~ sweep(Std.rand2(60, 70) => Std.mtof, Std.rand2f(1/60., 1/10.)::e); } } spork ~ yay(); while(true) { Std.rand2(1, 2)::d => now; 0.1 => s.next; Std.rand2(1, 2)::d => now; -0.1 => s.next; d => now; 1 => s.next; d => now; -1 => s.next; } fun float walk(float current, float min, float max, float step) { Std.rand2f(current - step, current + step) => float n; if(n < min) min => n; if(n > max) max => n; return n; } -- Tom Lieber http://AllTom.com/

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Bouncing .ck to audio files
by Ryan Wieghard 07 Dec '09

07 Dec '09

Hey all, I was wondering if there is a way to make the output of my .ck file an mp3 or wav file. Thanks Ryan. -- "Le savant n’étudie pas la nature parce que cela est utile ; il l’étudie parce qu’il y prend plaisir et il y prend plaisir parce qu’elle est belle." - Henri Poincaré

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FormSwep
by Robert Poor 07 Dec '09

07 Dec '09

Is FormSwep available in ChucK? I see it in the source code, I see it described in previous STK docs, the Moog UGen makes mention of it, but attempting to compile: FormSwep fs => blackhole; errors with "undefined type FormSwep in declaration" - Rob

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chuck 1.2.1.3 weird debug messages and aggregate devices
by mike clemow 06 Dec '09

06 Dec '09

Hi, chuck version: 1.2.1.3 (dracula) exe target: mac os x : intel I'm having trouble getting Chuck to not segfault using aggregate devices (only when trying to use more channels than in the first device) in Mac OS X 10.6. Has this always been an issue? Working around this for now, however, I'm curious what others' experiences have been with aggregate devices. Also, what's with the malloc messages in my newly compiled-from-source 1.2.1.3? Again, curious... Best, Mike -- http://michaelclemow.com http://semiotech.org

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Local-static bug
by Hans Aberg 05 Dec '09

05 Dec '09

For some reason, 'chuck' does not admit different type argument overloading on local & static class functions. The example below works as long as one does not call the static function. So either it should complain that it is illegal when encountering it in the class or admit this kind of overloading. Originally, I used a function "add" on intervals - not as artificial as the example below. Hans ---- local-static.ck ---- class Test { fun void print(float x) { chout <= "Local fun: " <= x <= "\n"; } fun static void print(float x, float y) { chout <= "Static fun: (" <= x <= ", " <= y <= ")\n"; } } Test.print(1, 2); // This call causes the run error. //Test t; //t.print(2); ---- run ---- $ chuck local-static.ck [local-static.ck]:line(11): cannot access member 'Test.print' without object instance... ----

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the novice chucKster trying to navigate the Event class
by Ryan Wieghard 01 Dec '09

01 Dec '09

Hello! So I am trying to design a data structure that is a list of musical events that are composed of duration, amplitude, and a list of four pitches to be assigned to SinOsc's . When I was constructing the idea, I called the atomic units of the lists "events" not knowing that there existed an Event class in chucK. When I researched the Event class, however, I become confused as to whether or not extended that class would be appropriate for what I am trying to achieve. I was wondering if someone could advise me the easiest way of going about creating a list of lists of two ints and a list: ["Event"Object1, "Event"Object2, ...,"Event"ObjectN] where "Event"Object[i] = [int amplitude, int duration, [pitch1,pitch2,pitch3,pitch4]] The idea is that one can simply iterate across the above list of "Event"Objects and assign a bank of four SinOsc's the pitchs 1 through 4; assign an envelope's gain to the amplitude, and advanced time by duration. I apologize if the above is an ugly articulation of my idea. Sincerely, Ryan. -- "Le savant n’étudie pas la nature parce que cela est utile ; il l’étudie parce qu’il y prend plaisir et il y prend plaisir parce qu’elle est belle." - Henri Poincaré

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