GuruBlog

I wrote a simple osc sequencer in ruby using rosc. The script triggers the drum-kit and the bass i implemented last week.

the pattern may also be of different length. This allows very interesting polyrythmic loops.

require 'osc'
Host = 'localhost'
Port = 3334

c = OSC::UDPSocket.new
hh = OSC::Message.new('/drum', 's', "hh" )
bd = OSC::Message.new('/drum', 's', "bd" )
sn = OSC::Message.new('/drum', 's', "sn" )

ba = OSC::Message.new('/bass', 'i', 64 )


#c.send sn, 0, Host, Port
bpm = 120
step = 1.0/8;
s = bpm * step / 60.0 ;

snd = [ bd, sn, hh ]
pattern = [
[1, 0, 0, 1, 0, 1, 0, 0 ],
[0, 0, 1, 0, 0, 0, 1, 1 ],
[1, 1, 1, 1, 1, 1, 1, 1 ]
]
bass = [
40, 40, 0, 40, 40, 0, 43, 0,
40, 40, 0, 40, 40, 0, 38, 0 ]

count = 0;
while(true)
    (0..2).each { |i|
        c.send(snd[i], 0, Host, Port) if pattern[i][count % pattern[i].length] == 1
    }

    ba.args = [bass[ count % bass.length]]
    c.send( ba, 0, Host, Port ) if bass[ count % bass.length ] != 0

    sleep s
    count+=1
end

I just made another little demo in processing. in fact i rewrote a little demo i did 15 years ago in pascal on a dos-box

I wrote a simple chuck script that generates a drum loop and a bass-sequence. later i wanted to reuse the sounds and started to search how to modularize the code.

so i started to convert my instrument declarations in classes. The instrument classes don't get connected to 'dac' directly. They have a "connect"-method that can be used by the main script.

to run the loop all the scripts must be given on the commandline

chuck Bass.ck DrumSet.ck loop.ck

The main script (loop.ck) instanciates a DrumSet and a Bass class and connects them to "dac". Than it generates a walking bass and a simple electronic drum loop.

DrumSet drm;
drm.connect( dac );

Bass bass;
bass.connect( dac );

[ 41, 41, 44, 46] @=> int bline[];
0 => int pos;
0 => int count;

while ( true ) {
    drm.hh();
    if ( count % 2 == 0 ) { drm.bd(); }
    if ( count % 4 == 2 ) { drm.sn(); }

    if ( count % 2 == 0 ) { spork ~ bass.bass( bline[ pos % 4 ]); }
    if ( count % 2 == 1 ) { spork ~ bass.bass( 12 + bline[ pos % 4 ]); }


    1 + count => count;
    if ( count % 4 == 0 ) { 1 + pos => pos; }
    250::ms => now;
}

I recently installed python3. While scanning through the module directory a package named "antigravity" catched my eye.

when i typed "import antigravity" python opend a browser-window with this link

i really like python - and xkcd :-)

Today i was visiting the Technical Museum of Vienna and while standing in front of favourite exhibit - the Mailüfterl which is
the first european full transistorized computer - i thought it would be cool to see some code running on this machine.

back home i googled a bit and - tata - someone has written a emulator of the mailüfterl!

note: the image is from Wikipedia and was shot by Florian Staudacher and was licenced under Creative Commons Attribution 3.0 Unported

a while ago i made some wooden bots while waiting for a download. My family really liked them - so they got our xmas-tree decoration this year :-)

      __
   __/  \__
  /  \__/  \     ()
  \__/  \__/    O//)-
  /  \__/  \     ()
  \__/  \__/
     \__/
      ||   __
      ||  / /|
      || / / |
      ||/ / /
      || / /
      ||/_/

i wrote a processing sketch to visualize and record sessions on a training bike. To calculate the rotation-speed of my training bike i hooked up 2 reed-switches to my arduino and taped them to my training bike. Than i sticked a rare earth magnet on each pedal.

the processing sketch draws a small figure on a bike which is animated at the same speed as the bike.

the sketch also records the timestamps to a log file for later analysis.

I just made a processing sketch using my ical4p library. The programm draws a flower for every event in a given ical-file. The more events the calender has, the more beautifull the flower-garden is :-)

i have written a small wrapper around ical4j written by Ben Fortuna. This allows to write processing sketches, that visualize data from ical files.

i included a small example in the lib showing how to draw a timeline based on an ical file.

i also have set up a project-page for it. The libray is released under the LGPL.