The Octave Divider in the examples seems to be a frequency shifter (like the Bode) but it would be fun to build a Octaviator/Octaver like the guitar/bass pedal fx, although it qualifys as the least natural sounding pitching device. Its a frequency divider and the results are naturally rectangular waveforms which sounds in most cases terrible but sometimes interesting timbres show up.
Cheers,
Malte Steiner media art + development -www.block4.com-
new releseas: Elektronengehirn: new composition on http://www.bremsstrahlung-recordings.org/transradiation/trans002.php
Konform: new song on Acido03 12" compilation concert 1. september Astrastube Hamburg, Germany more at blog 4, also available as rss feed: http://java.block4.com/blog4/