iani’s blog @ earlab.org

A simple description of the algorithm for Achorripsis by Iannis Xenakis, as described by Orestis Plakias in class. Furthermore some incremental notes towards coding this in SuperCollider.


 
/*
420 seconds
divided in sections of 15 seconds
Each section contains one event.
There are 5 kinds of events:
  - Silence
  - Simple Event
  - 2 events (compound event 2)
  - 3 events (compound event 3)
  - 4 events (compound event 4)
The compound events 2, 3, and 4 are composed of 2, 3, and 4 events respectively, where each one of the component events  can start at any time independent of the other within the time span of the composed event
*/
 
-------------------------
~proto = Event.make({
  ~chrono = { "hello".postln; };
  ~dtime = 15;
});
~proto;
~proto.chrono;
~proto.dtime;
-------------------------
~proto = Event.make({
  ~num_repeats = 28;
  ~dtime = 15;
  ~chrono = Routine({
    "starting".postln;
    ~num_repeats do: { | index |
      index.postln;
      (~dtime / 10).wait;
    };
  });
});
 
~proto
~proto.chrono.play;
-------------------------
-------------------------
~proto = Event.make({
  ~num_repeats = 28;
  ~dtime = 15;
  ~chrono = Routine({
    "starting".postln;
    ~num_repeats do: { | index |
      index.postln;
      (~dtime / 10).wait;
    };
  });
  ~play = { ~chrono.play };
  ~stop = {
      ~chrono.stop;
      "stopped".postln;
  };
});
 
~proto
~proto.play;
-------------------------
(
~proto = Event.make({
  ~num_repeats = 28;
  ~dtime = 15;
  ~scale = 0.1;
  ~scaled_dtime = { ~dtime * ~scale };
  ~play_single_event = {
    // compute start dtime
    ~start_time = 0 rrandom: (~scaled_dtime * 0.5);
    // compute playback parameters
    // select a buffer at random
    // play that buffer
  };
  ~play_event = { | num_component_events = 1 |
    num_component_events do: {
      ~play_single_event.value;
    }
  }
  ~action = { ~play_event.value(5.random); };
  ~chrono = Routine({
    "starting".postln;
    ~num_repeats do: { | index |
      index.postln;
      ~scaled_dtime.value.wait;
    };
  });
  ~play = {
    if ((~chrono.state == 0) or: (~chrono.state == 6)) {
      ~chrono.reset;
      ~chrono.play;
    }{
      "already running".postln;
    }
  };
  ~stop = {
      ~chrono.stop;
  };
});
)
 
~proto.play;
~proto.stop;
~proto.chrono.state
 
-------------------------
/*
~chrono = Event.make({
  chrono: Routine({
    loop {  
      ~
      15.wait;
    }
  });
})
*/


From a post to emf.org:

—- Press Release from Post-Concrete

On Chinese New Year’s Day, Feb 7, 2008, Post-Concrete started a brand-new line of releases of sound art, experimental electronic, laptop Max/MSP/Jitter/SuperCollider, algorithmic piano, noise, not-in-the-field recordings, live bootlegs, etc., featuring mostly artists from China, Taiwan and Hong Kong. This line, called ARCHIVAL VINYL, is net-only and all releases are offered in the lossless FLAC format (i.e., CD quality sound and can be burned to CDs). All for immediate download at zero cost.

Six titles have been released in three days (with more in the works):

AV001 Wang Changcun - KUNCHONG
AV002 Xie Zhongqi - KUROJAWAN
AV003 Jiang Liwei - EXPERIENCES
AV004 Yao Dajuin - DREAM REVERBERATIONS (singles)
AV005 Wolfenstein - LIVE AT NANHAI 2007
AV006 2RqP5k - ANTECHRE LIVE IN SHANGHAI

ARCHIVAL VINYL: http://www.post-concrete.com/vinyl/

_____________

BTW, another good source for tapping into the Chinese scene is Global Noise Online (GNO), the only English-language blog/source that documents what’s going on in the field of experimental music and sound art in China, Taiwan, and Hong Kong right now.

GNO: http://www.chinesenewear.com/gno/

Happy Lunar New Year,

Dajuin Yao
Post-Concrete