 In the 1970s, Roth and Ule W. Ritgen formed Black Angel in Hanover, and played together for a few years while attending university.After the band, which played music influenced by Eric Clapton, Jimi Hendrix, etc., broke up in 1977, Ritgen played bass in Zeno's brother Uli Jon Roth's band Electric Sun, appearing on three of their albums.By 1980, Zeno Roth and Ule Ritgen were again working together, now playing in a more melodic style.