<P> The song is in the key of E major and is in 4 / 4 time during the verse , chorus and bridge , but changes to 5 / 4 in the pick - up to the verse . It grew ( like `` Sun King '' ) from the F ♯ m7 - E changes from Fleetwood Mac 's `` Albatross '' ( `` like she does '' ( F ♯ m7 ) `` yes she does '' ( A , Am ) `` yes she does '' ( E ) ) with McCartney arranging instrumental and vocal parts and Harrison adding a descending two - part lead guitar accompaniment to the verse and a countermelody in the bridge . Alan W. Pollack states that `` the counterpoint melody played in octaves during the Alternate Verse by the bass and lead guitars is one of the more novel , unusual instrumental touches you 'll find anywhere in the Beatles catalogue . '' </P>
<P> The song is in the key of E major and is in 4 / 4 time during the verse , chorus and bridge , but changes to 5 / 4 in the pick - up to the verse . It grew ( like `` Sun King '' ) from the F ♯ m7 - E changes from Fleetwood Mac 's `` Albatross '' ( `` like she does '' ( F ♯ m7 ) `` yes she does '' ( A , Am ) `` yes she does '' ( E ) ) with McCartney arranging instrumental and vocal parts and Harrison adding a descending two - part lead guitar accompaniment to the verse and a countermelody in the bridge . Alan W. Pollack states that `` the counterpoint melody played in octaves during the Alternate Verse by the bass and lead guitars is one of the more novel , unusual instrumental touches you 'll find anywhere in the Beatles catalogue . '' </P>
who played keyboard on do n 't let me down
who played keyboard on do n 't let me down
McCartney
McCartney