Archived request from the wiki:

Halldorophone

• Other links: http://www.halldorulfarsson.info/halldorophones
• Family: String
• Description: Electro-acoustic string instruments in development by Halldór Úlfarsson.
• Appears on:
  1. Tomorrow, in a Year (by Hildur Guðnadóttir)
  2. Summer Make Good (by Halldór Úlfarsson)
  3. 26000 (by Hildur Guðnadóttir on track 5)
  4. Katy Lied, as dorophone, played by Jeff Porcaro
• Comments:
  • http://www.discogs.com/search?q=halldorophone

electric feedback string drone