My Little Grundgestalts

Here I describe the algorithmic music I call "Grundgestalts"

Thanks to my friend Wim (,) the last few days I have been reading a beautiful book, “Krabat,” by Otfried Preußler. The mood of the present Grundgestalt made me think of a certain passage in that book; and led me to the title of this track. Many thanks, Wim!

A mantra (Sanskrit: मन्त्र, romanized: mantra, English pronunciation /ˈmæntrə, ˈmɑːn-, ˈmʌn-/) is a sacred utterance, a numinous sound, a syllable, word or phonemes, or group of words in Sanskrit believed by practitioners to have psychological and/or spiritual powers

Videoclip available on Open Tube.

Music and video © 2020 Eidon ( All rights reserved. desrever sgnorw llA


“Yesterday evening something interesting happened to me; I wrote down a random string and used it as input for generating a number of seeds for my music. When I listened to it, I realized there were two themes that I felt were 'special'; they were beautiful to my ear. I wish I were able to compose one such theme, I said to myself. So I set myself in motion as if I was possessed by those musical ideas. I mixed the material into a piece made of four parts. When I finished, it was quite late in the night...”

(from a message I wrote to a dear friend of mine).

  • I Seibu 『声部』means 'Voice'. I heard this voice and was captured by its serenity — a serenity that does not comes from a human mind. A ghostly voice, perhaps? Two instruments play this Voice: bassoon and English horn. Tubular bells signal the end of this piece. The theme is a representation of the pack in the hands of one of the two players.
  • II Kwaidan 『怪談』 is an orchestration of the above 'Voice'. In addition to bassoon and English horn I have strings and double bass. Strings “play” the pack of cards “on the table”.
  • III Xenocronia plays the second Voice in a xenochrony of bassoon, English horn, and flute. This is the pack of cards in the hands of the opponent of the “Seibu player”.
  • IV Jazz is for piano, drums, and double bass. The simple piano line is made by composing the two voices together. Drums play the whole set of cards.


ca=“ \\\n” a=10078970003540 cc=“” z=“” b=“” for i in seq 8 ; do b=${a}${z} cc=“${cc} ${a}${z} ${z}${a} \\\n” z=“${z}1” done

echo -e $ca $cc > zz

chmod +x zz zz

The shell script interprets the input strings as packs of cards and simulates with them “Beggar my Neighbour” games: \
 10078970003540 10078970003540
 100789700035401 110078970003540
 1007897000354011 1110078970003540
 10078970003540111 11110078970003540
 100789700035401111 111110078970003540
 1007897000354011111 1111110078970003540
 10078970003540111111 11111110078970003540
 100789700035401111111 111111110078970003540

The music generation repository is here. (It is still to be updated with the Beggar-my-neighbour generator...)

Kwaidan's video was produced via Feedpovray. Each part renders a different set of permutation numbers.

The video fragments were created with ffmpeg:

    ffmpeg -framerate 23.976 -pattern_type glob -i '*.png' -i "$1" \
           -c:a aac -b:a 128k  -c:v libx264 -r 23.976 -pix_fmt yuv420p \
           -filter:v "fade=in:st=0:d=5, fade=out:st=$duration:d=5" video.mp4

where “$1” is the audio data.

Finally, I concatenated the videos and added chapters, also via ffmpeg.

© 2020 Eidon ( All rights reserved. desrever sgnorw llA © 2020 Eidon. All rights reserved. desrever sgnorw llA

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My blog collects a few of my Grundgestalts.

Kwaidan's videoclip is also available on Open Tube