Pete Johansen played the violin on that demo, although he did not officially join the band until the recording of their first full-length album Lake of Sorrow later in 1998.

During the following tour, Anita Auglend, Anders Thue, and Ingfrid Stensland grew weary of traveling and left the band in 2001.

The Sins of Thy Beloved are often compared to gothic metal bands such as Tristania and early Theatre of Tragedy, mainly because of the band's combination of a female soprano voice with male death grunt; this trait is common to gothic metal in general, and is known as "beauty and the beast" vocals.

Their music features death-doom rhythmics enhanced by the prominent use of violins, especially on the Lake of Sorrow album, typical of many gothic doom bands.

Their live recordings offer a sound closer to traditional death metal than their studio albums, which make heavy use of arrangements and effects.