_drone:     A continuous low humming or buzzing sound (from the bee's humming sound).   The American Heritage® Dictionary of the English Language, Fourth Edition. Copyright © 2000 by Houghton Mifflin Company. Published by the Houghton Mifflin Company. All rights reserved. _dronecore:   music that goes to the core of sound. Genre that creates "soundscapes" where sound - and nothing else - is the protagonist.   this term is used here as a tribute to Thomas Köner, Jonathan Coleclough and Marcus Obst   <