IATT, formerly I AM THE TRIREME, formed in 2008 and hails from Philadelphia, Pennsylvania. They release "Nomenclature" on September 27, 2019. Although this is their second full-length album, they have also released several EPs in their discography. The style of this album can be described as progressive melodic black metal, mixing melodic black metal elements with unconventional song structures and composition.

The traditional fast-paced black metal riff can be found throughout this album and is used to great effect compositionally. However, the melodic passages are where the guitarists truly excel. The band names NE OBLIVISCARIS as an artist they like, and that influence can be heard in this album by the chord progressions. Each song contains a few transitions, but they rarely feel abrupt. Their drummer helps with transitions, changing to match the tempo and atmosphere as needed. The orchestral soundscape is a definite highlight. It is tastefully done and adds atmosphere without cheesiness and needless pomp. According to their Bandcamp, the theme of this album is "mysticism and the dark nature surrounding primitive medicine circa 1700." IATT executes the theme fairly well. The atmosphere conjured up by the music is dark, ominous, and bleak.

This album doesn't start off gently. "Cor Pulmonale" begins with a punch from the vocalist and the blast beats. It gives way with some orchestral fanfare to a soft melody overlaid with a deep spoken verse. The heaviness returns quickly with tremolo picking, blast beats, and mixed vocals. The chord progressions and transitions in this song are exceptional. My only criticism of this song is about the backing vocals around the two minute mark. Even after repeated listens, I don't think they add anything to that section.

"Molyneuxs Problem" grew on me after several listens. It starts off with slow and melancholic guitar riffs that could be found on a death/doom song. Over the course of the song, it transitions through chugging riffs, gentle acoustic sections, and melodic shredding. The fifth track "Hijama" offers a nice, if short, break from the extremity. It is a moody and haunting instrumental piano piece that leads right into "Osteogenesis Imperfecta," one of my favorite songs on the album. The tremolo picking and harmonizing guitars create a bleak atmosphere.

The track that follows is "Pseudobulbar Affect," another instrumental. I call this track out specifically because the jovial carnival style accordion and laugh track juxtaposed with the creepy piano melody works well at creating a feeling of dread. "Yersenia Pestis" is a beautiful track, with soft piano and wailing guitars giving a sense of desperation. The last song, "Arsenic Ways" is a great closer. It contains a violin section that is reminiscent of NE OBLIVISCARIS.

Overall, I highly recommend this album. The musical composition on this album is stellar. It is a complex album that rewards repeated listening.