A very dark and distorted sound starts off the album before going into more of a heavier and atmospheric progressive metal direction as well as adding in melodic guitar leads that are used on and off throughout the recording and when vocals are added into the music they are in a clean singing style and the band also goes for more of the modern style of prog metal.
There is a good mixture of both clean and heavy parts present throughout the recording and after awhile death metal growls are added into certain sections of the recording along with more of an atmospheric sound and the synths also bring in a psychedelic feeling to some of the tracks while the solos and leads are in more of a melodic musical direction.
On some of the songs acoustic guitar parts are added in while the main focus remains more on a heavier sound and as the album progresses ambient sounds are added onto the recording and are used quite often along with a few instrumentals while there is still a great amount of vocals and heavy parts present on the later songs and they also bring in a few tracks that are very long and epic in length.
Sullen plays a style of progressive metal that is very modern and also brings in the heaviness of doom and death metal along with some elements of experimental to create a very original sound, the production sounds very professional for being a self released recording while the lyrics cover dark themes.
In my opinion Sullen are a very great sounding experimental and ambient mixture of progressive, doom and death metal and if you are a fan of those musical genres, you should check out this band. RECOMMENDED TRACKS INCLUDE "Broken Path" "Become" "The Purge" and "Engulf". 8 out of 10.