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Triune [disquiet0062-lifeofsine]

mysterybear on March 09, 2013 02:04

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    In 6 Sets

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    In 4 Groups

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    This is an entry for the Disquiet Junto project for March 7-11, 2013.

    The instructions were:
    Step 1: Devise which three sine waves you will employ. They should be different from each other in some evident way.
    Step 2: The track should open with just one of the sine waves.
    Step 3: Add the second sine wave at 5 seconds.
    Step 4: Add the third sine wave at 10 seconds.
    Step 4: Only at 15 seconds should you begin to in any way manipulate any of the source waves.

    I wrote a Csound program that generates three sine waves.
    - The first tone is a 240Hz tone that sounds for the entire piece.
    - The second tone is higher, starting at a ratio of 31/16 relative to the first tone (sharper than a major seventh, derived from the 31st harmonic).
    - The third tone is lower, at a ratio of 16/31 relative to the first tone (the reciprocal of the second tone).
    - After 15 seconds. the second tone starts gliding downwards in pitch until it reaches the ratio of 65/64 (flatter than a minor second, corresponding to the 65th harmonic).
    - Also at 15 seconds, the third tone start gliding upward in pitch until it reaches the ratio of 64/65 (again, the reciprocal of the second tone).
    - Elapsed time making the piece (not counting the time I thought about it before making it): about an hour.

    Tl;dr: starts wide, gets narrow.

    The sound file is just the output of running the Csound program, with no other manipulation. The source code is available at https://github.com/DaveSeidel/music-src/tree/master/disquiet0062-lifeofsine.

    The image is from http://en.wikipedia.org/wiki/File:SierpinskiTriangle.PNG and is in the public domain.

    More on this 60th Disquiet Junto project at:

    http://disquiet.com/2013/03/07/disquiet0062-lifeofsine

    More details on the Disquiet Junto at:

    Disquiet Junto/

    "Triune [disquiet0062-lifeofsine]" by mysterybear is licensed under a Creative Commons License

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