E-flat clarinet
The original orchestral arrangement of "Mothership" is scored for three flutes (3rd doubling piccolo), E-flat clarinet, two clarinets (both doubling bass clarinet), three oboes (3rd doubling English horn), two bassoons, contrabassoon, four French horns, three trumpets, two trombones, bass trombone, tuba, three percussionists, laptop, timpani, harp, piano, and strings.