Radiohead - National Anthem Chords & Tabs

play the main bass riff of the song you need to drop the top E string to a D.
it is
--4--0--0-0---4--0--0--0-0-
--3--0--0--0---2--0--0--0-0  
(repeat)
[ Tab from: https://www.guitartabs.cc/tabs/r/radiohead/national_anthem_tab_ver_4.html ]
is Jonny's martenot riff 
that he plays on the intro and after the 1st 2nd verses and throughout the end of the song.
tabbed it out for guitar but it sounds better played on a keyboard with a effect. So next to the numbers on the fret I will include the note if want to play it on a keyboard.
Part
-------------------------------------------------------------------------------------------------------------------------------------14-(A)-----11-(F#)---15--(Bb)---12--(G)----14-(A)---11--(F#)--10-(F)---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
playing this on guitar try a tremolo slide thing like on Airbag.