Delirium Deluxe Edition is a masterclass in musical diversity, seamlessly blending genres like pop, electronic, and indie rock. The album features a range of tempos, from the upbeat and energetic tracks like "On My Mind" and "Army" to the melancholic and introspective songs like "Still Falling for You" and "Burn". Goulding's vocal range is on full display throughout the album, showcasing her impressive vocal agility and emotional depth.