OpenObject tutorials

7 short screencasts with code examples showing how to connect supercollider with max/pd/processing (etc) using the openobject quark.
download the example code here... http://www.subnet.at/content/supercollider-tutorials-0

update 150316: uploaded the code here below and made it compatible with sc3.6. thanks to edN for noticing.

to run all the examples you will need supercollider, processing (with the oscP5 library), maxmsp and puredata extended (could be easily adapted for pd vanilla).

install OpenObject from within supercollider with Quarks.install("OpenObject");

these screencasts were made at the 10days of SuperCollider network music workshop at subnet, salzburg, october 2009.

openobject quark by julian rohrhuber, tutorials by fredrik olofsson, voiceover and support by max kickinger.

thanks to subnet.at

OpenObject overview from redFrik on Vimeo.

OpenObject 00 maxmsp from redFrik on Vimeo.

OpenObject 01 maxmsp from redFrik on Vimeo.

OpenObject 02 maxmsp from redFrik on Vimeo.

OpenObject 03 puredata from redFrik on Vimeo.

OpenObject 04 puredata from redFrik on Vimeo.

OpenObject 05 processing from redFrik on Vimeo.

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Package icon openobject_demos.zip28.2 KB

swiki

just a listing of some of the supercollider code i've published on the swiki. much is old but still fully functional and hopefully useful.

http://swiki.hfbk-hamburg.de:8888/MusicTechnology/743 - 3d extensions for the Pen class. vector and matrix multiplication.

http://swiki.hfbk-hamburg.de:8888/MusicTechnology/760 - 1d cellular automata pattern.

http://swiki.hfbk-hamburg.de:8888/MusicTechnology/818 - livecoding practice sessions.

http://swiki.hfbk-hamburg.de:8888/MusicTechnology/854 - more livecoding practice sessions.

http://swiki.hfbk-hamburg.de:8888/MusicTechnology/763 - tempo clock synchronisation and beat matching.

http://swiki.hfbk-hamburg.de:8888/MusicTechnology/833 - some drawings.

http://swiki.hfbk-hamburg.de:8888/MusicTechnology/901 - examples ported from nodebox.

http://swiki.hfbk-hamburg.de:8888/MusicTechnology/902 - examples ported from processing.

http://swiki.hfbk-hamburg.de:8888/MusicTechnology/726 - quicklauncher folder gui.

http://swiki.hfbk-hamburg.de:8888/MusicTechnology/810 - hacked server windows.

http://swiki.hfbk-hamburg.de:8888/MusicTechnology/870 - a silly drummachine.

http://swiki.hfbk-hamburg.de:8888/MusicTechnology/869 - port of particle chamber by derek holzer.

http://swiki.hfbk-hamburg.de:8888/MusicTechnology/906 - examples ported from form+code.

klipp av logo

some supercollider code to generate old school klipp av logos.

click the window in the sc code to generate new pictures.

//redFrik
(
        var width= 800, height= 600;
        var win, usr, p0, p1, l= 50, w= 10, h= 15, c= 0.9, o= 0.1;
        win= Window("nystan", Rect(128, 64, width, height), false);
        usr= UserView(win, Rect(0, 0, width, height));
        usr.mouseDownAction= {usr.refresh};
        usr.background= Color.new255(51, 47, 57);
        win.front;
        usr.drawFunc= {
                Pen.translate(width*0.5, height*0.5);
                5.rrand(20).do{
                        var p, pp1, len;
                        Pen.rotate(pi.linrand);
                        p0= Point(0, 0);
                        p1= Point(0, h.rand*10.linrand);
                        pp1= p1;
                        (20.linrand).do{|i|
                                len= l+l.rand2;
                                Pen.color= Color(c, c, c.rrand(1.0), (1-c).rrand(1.0));
                                Pen.moveTo(p0);
                                Pen.lineTo(p1);
                                if(o.coin, {
                                        p= 200.rand;
                                        p0= p0+p;
                                        p1= p1+p;
                                }, {
                                        p0= p0+Point(len+w.rand2, h.rand);
                                        p1= p1+Point(len+w.rand2, h.rand);
                                });
                                Pen.lineTo(p1);
                                Pen.lineTo(p0);
                                Pen.draw(0);
                        };
                        Pen.moveTo(p0);
                        Pen.lineTo(p1);
                        Pen.lineTo(pp1);
                        Pen.lineTo(Point(0, 0));
                        Pen.draw(5.rand);
                };
        };
        CmdPeriod.doOnce({if(win.isClosed.not, {win.close})});
)

sunday drawings

2006 i fiddled with some simple drawing routines in sc. (http://swiki.hfbk-hamburg.de:8888/MusicTechnology/833). now i've added matching (?) sound synthesis and some slight modifications to the drawing code. there are 7 parameters that are used to both generate the picture and the sound. normally the parameters are randomised but it is possible to copy&paste a good sounding/looking set of parameters into the code to get the same drawing back.

below is the new code + embedded vimeos.

//redFrik
(
s.latency= 0.05;
s.waitForBoot{
        var width= 640, height= 480, w, u, drawFunc, clearFunc;
        var fadeAtk= 1400, fadeSus= 700, fadeRel= 350;
        var a, b, c, d, e, f, g, i= 0, theta= 0;
        var syn= SynthDef(\sunday, {|amp= 0, a= 1, b= 1, c= 1, d= 1, e= 1, f= 1, g= 1|
                var z0= Mix(BPF.ar(LFSaw.ar([a, b]), a+b, e, amp));
                var z1= SinOsc.ar(a, Ringz.ar(z0, c.abs, f, 2pi), amp);
                var z2= SinOsc.ar(b, Ringz.ar(z0, d.abs, g, 2pi), amp);
                Out.ar(0, Pan2.ar(z0, 0, 0.3)+Pan2.ar(z1, -0.3, 0.3)+Pan2.ar(z2, 0.3, 0.3));
        }).play(s);
        s.sync;
        w= Window("sunday drawings2", Rect(128, 64, width, height), false);
        drawFunc= {
                var x, y;
                if(i==0, {
                        "//---------------------".postln;
                        [
                                \a, a, \b, b, \c, c, \d, d, \e, e, \f, f, \g, g
                        ].pairsDo{|m, n| (""++m++"="+n++";").postln};
                });
                if(i<fadeAtk, {
                        theta= theta+(d*e*f);
                        x= sin(theta*a%a/b*c*2pi);
                        y= sin(theta*b%b/a*d*2pi);
                        Pen.strokeColor= Color.grey(1, 0.5);
                        Pen.translate(width*0.5, height*0.5);
                        Pen.scale(f, g);
                        Pen.rotate(theta);
                        switch(a%3,
                                0, {Pen.strokeOval(Rect.aboutPoint(Point(x*100, y*100), a, b))},
                                1, {Pen.strokeRect(Rect.aboutPoint(Point(x*100, y*100), a, b))},
                                2, {Pen.line(Point(x*100, y*100), Point(a*c*100, b*d*100)); Pen.stroke}
                        );
                        syn.set(\amp, i/fadeAtk, \a, a, \b, b, \c, c, \d, d, \e, e, \f, f, \g, g);
                });
                if(i>(fadeAtk+fadeSus), {
                        clearFunc.value;
                        theta= 0;
                        Pen.fillColor= Color.grey(0, 5/fadeRel);
                        Pen.fillRect(Rect(0, 0, width, height));
                        syn.set(\amp, i.linexp(fadeAtk+fadeSus, fadeAtk+fadeSus+fadeRel, 1, 0.0001));
                });
                if(i==(fadeAtk+fadeSus+fadeRel), {
                        i= 0;
                }, {
                        i= i+1;
                });
        };
        clearFunc= {
               
                //--replace with preset from here
                a= 200.rand+1;
                b= 200.rand+1;
                c= 3.0.rand2;
                d= 3.0.rand2;
                e= 3.0.rand;
                f= 0.1.rrand(1.5)*#[1, -1].choose;
                g= 0.1.rrand(1.5)*#[1, -1].choose;
                //--to here
               
        };
        clearFunc.value;
        u= UserView(w, Rect(0, 0, width, height))
                .clearOnRefresh_(false)
                .drawFunc_(drawFunc)
                .background_(Color.black);
        w.front;
        u.animate= true;
        CmdPeriod.doOnce({if(w.isClosed.not, {w.close})});
        w.onClose= {syn.free};
};
)

ipod touch microphone

i bought the klinkenstecker 3,5mm 4pol for €2,40 from segor.de. the capsule microphone i had laying around. sorry no data or idea where i got it. the whole thing is very simple to build and the sound is totally allright. now i can record into the ipod thouch and run apps like rjdj and supercollider with audio input.

sc140 - the sctweets album

i'm proud to have contributed with one short track on the just released CC BY-NC-SA 3 licensed album sc140. download/listen here. it is compiled by dan stowell and consists of 22 tracks with corresponding supercollider source code. the thing with this project is that all the tracks are written to fit within the twitter limitation of 140 characters. read the source code here

reference: 140 character examples

http://thewire.co.uk/articles/3177/

el-wire

for our recent installation at iscm world new music days in växjö (www.musicalfieldsforever.com/searching_voices_conc.html), i built a circuit for controlling 9x5m el-wire (electroluminescence). there are 9 channels in total and 3 inverters that are powering three 5meter cables each. tic201d triacs are used for switching the 110v ac on/off, 9 led+ldr pairs (aka vactrol) generates the control voltage for the triacs and wireless control for the whole thing is obtained with an atmega8 and a pair of nordic transceivers. supercollider is generating the control data.

el-wire_9ch_triacs from redFrik on Vimeo.

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Image icon el-wire_9ch_triacs.png39.79 KB
Binary Data el-wire_9ch_triacs.sch95.41 KB

intel vs ppc

update 090811: thanks to batuhan bozkurt for putting me straight. it's not an intel vs ppc issue but rather apple changed something in their internal soundcards. using a newer (intel) machine and an external soundcard (fireface 400), the punk code sounds the same as the ppc version below (ie good/better in my ears - no autocompression).
so the internal soundcard in my old powerbook (1ghz, ppc) is robust, filters hardly ever blows up and it doesn't have that automatic compressor/limiter as my newer macbook pro (2.16ghz duo, intel) internal soundcard.

--original post:
something i knew all along but tried to ignore: many of my noisier synths sounds like crap on modern (intel) macintoshes and some even goes all silent. the code below deliberately blows up a resonant hipass filter and is typical for how different the same code can sound on my intel vs my ppc mac. listen to the attached mp3 files. in a few years all the ppc computers will be gone and we can't recreate the sounds.

//punk (loud!)
{RHPF.ar(GbmanN.ar([2300,1150]),LFSaw.ar(Pulse.ar(4,[1,2]/8,1,LFPulse.ar(1/8)/5+1))+2)}.play
AttachmentSize
Audio icon punk_intel.mp3759.55 KB
Audio icon punk_ppc.mp31.48 MB

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