 Grohl added that there was a bigger focus on melodies even in heavier tracks such as "The Pretender", "Let It Die" and "Erase/Replace", and that album closer "Home", a ballad featuring Grohl on the piano, was "the best song I've ever written".The songs of the album are noted for their changing dynamics – with "middle sections [that] turn into this mass orchestrated swarm and ridiculous time signatures" which include musical references to 1970s soft rock bands such as Wings, Eagles and Bread - summed by Hawkins by saying the band "wanted to make sure that everything 'built' on this record, that each instrument started somewhere and went somewhere else in the course of a song".The drummer attributed this to the acoustic tour leading the band to "shed some of the fear of incorporating mellower stuff with the heavy stuff", and Grohl added that "we wanted the stops to be pin-drop silent before exploding.