The album is one of the earliest examples of
death metal and is considered to have helped pioneer the sound along with
Possessed's
Seven Churches in 1985 and
Death's
Scream Bloody Gore in 1987. Additionally, the album is said to contain elements of
speed metal. Though now described as sounding "raw and primitive,"
Altars of Madness is considered to be a musically groundbreaking album in
extreme metal, and has been said to make the music of Morbid Angel's predecessors
Slayer and
Venom sound like "
children's music" by comparison. It is said to be "crisper" and more coherent than releases from other extreme bands during the time, and the songwriting is said to contain
hooks. Jason Birchmeier of
AllMusic assessed that "never before had a
heavy metal band carried their lightning-fast guitar riffs and equally spellbinding guitar solos into such horrific territory," and likened the band's speed to playing in "
fast-forward mode." The album's sound has been described as "being hunted through forgotten tombs by diseased
ghouls, slowly shedding the last rags of your
sanity." The album's style has drawn comparisons to the "wilder moments" of early
Napalm Death releases. The album's style is also characterized by extremely fast performances, complex compositions, and technically demanding musicianship, producing a "musical onslaught [that] will surely send children and parents running away in fear". Frontman
David Vincent's vocals have been described as "monstrous." His style derived influence from early English
grindcore as well as from the
death growls of
Chuck Schuldiner of
Death. The album's lyrical content explores themes such as
Satanism and
blasphemy, and are said to "seem
far too sincere to be a
pose". The album's tracks have also been called "awkward and chaotic tales of madness," drawing comparisons to
Lovecraftian horror. The
guitar work of Trey Azagthoth has been described as "
demented," and as sounding like he was "taking the guitar and making it
wail as if it were slowly being melted." Azagthoth himself has noted that
psychedelic music was an influence on his writing on the album, especially the work of
Pink Floyd. When composing
guitar solos on the album, he abandoned the use of traditional
scales and said that "I would just pick
an area on the guitar and play it without really looking at it. I'd connect it in a different way." == Artwork ==