Sounding the Seventh Trumpet was generally well received by critics. AllMusic rated the album three stars out of five and wrote: "Sounding the Seventh Trumpet is a magnificent album that is suitable for any fan of metal music, as Avenged Sevenfold has a firm grasp on all that is extreme." The review also praised the tracks "Darkness Surrounding" and "We Come out at Night" as being "...excellent metalcore masterpieces, as the vocal harmonies add to these cuts to evolve the songs into fully atmospheric sonic blasts."
The title 'Sounding the Seventh Trumpet' takes its name from the Book of Revelation, specifically referencing chapter 11 and the sounding of the last (seventh) trumpet, showing the end of the world. Valary DiBenedetto (M. Shadows' future wife) performs vocals on the track "The Art of Subconscious Illusion." The album was released on vinyl for the first time in 2008