Half in California – half in the Netherlands, QUADVIUM is an instrumental progressive metal-fusion quartet that was founded by American bass player Steve Di Giorgio (TESTAMENT, DEATH) and Dutch bass player Jeroen Paul Thesseling (OBSCURA, PESTILENCE) both innovators in bringing a different style of fretless playing to metal. Launching a band with two predominantly multi-string fretless bass players is no common occurrence, and the bass-duo felt they needed to take very special and deliberate time to get the right alignment with who is participating and what will be the end result - meaning the right sound and composition to represent this rare vision.

Over time, together with Dutch master drummer Yuma van Eekelen (EXIVIOUS, PESTILENCE) and American guitar virtuoso/ composer Eve (MYTH OF I, KAATHE) – whose contribution and expertise play a huge part of QUADVIUM – the music began to take shape. The line-up is just the right blend to mix the delicate balance of such a heavy aural offering and a full vocabulary of high level constructed pieces. QUADVIUM finished their much anticipated recordings and released the singles 'NÁSTRÖND' and 'APOPHIS' both taken from the upcoming debut album 'TETRADŌM', set to be released on May 30th via Agonia Records.