a pastoral, homemade-style "collection of pop vignettes"Mustard is a more fully fledged pop album, lessening the amount of studio effects and absurdist humour in favour of a grander sound, with chiming keyboards, densely layered harmonies and vast production, with Erlewine describing each song as "an epic pop extravaganza in miniature". Wood based the album's songs on different styles, although Brian Wilson remained a large influence on the composition. The opening title track is a 90-second jingle performed in the style of dance band-era group the Andrew Sisters, with harmonies achieved by Wood's sped-up vocal tapes and a scratchy sound quality intended to make the recording sound like a 1940s radio show, before concluding in fake applause. "Any Old Time Will Do" is a straightforward, melodic song, while "The Rain Came Down on Everything" is a ballad with a medieval, quasi-classical style, featuring an atmospheric intro of choral singing and eerie noises and a crescendo with Wagnerian-style operatic vocals, harmonies, harps and heavy drums, eventually culminating in the sound of a thunderstorm. Beginning with a soundscape of saxophone effects and a distorted siren, "You Sure Got It Now" was intended by Wood to sound like "the Andrew Sisters backed by John Mayall", and features the album's heaviest use of unusual studio effects and Wood's absurdist humour. Writer Philip Auslander felt the song's opening section, with its classical-styled passage and electronic sounds reminiscent of busy telephone signals, proved Wood was "welcoming us into a chaotic realm where anything is possible", noting the diverse usage of both musical and noise elements. In the main body of the song, Wood sings in different imitative vocal styles, exemplifying how the musician switches between his natural singing voice and others throughout the album. "Why Does Such a Pretty Girl Sing Those Sad Songs" is a subtler song influenced by the Beach Boys, while "The Song" is a lengthy ballad with a string backing, although vocals only feature in the first two minutes, the rest of the recording being a funeral march-style instrumental section. "Look Thru the Eyes of a Fool" was described by Betrock as "a crisp and exciting updating of Goffin-King via Spector's 'Da Do Ron Ron, and again exhibits a Beach Boys influence. The 85-second "Interlude" features a chanted melody that is repeated in its second half on bagpipes; Wood described the track as beginning with "Beach Boys type harmonies" before changing into "a