Complex sentence: By the time this album was released, the band had already undergone their first change in line-up, however they still maintained much of the style of their first album, "In the Court of the Crimson King".
Split into simpler sentences: By the time this album was released, the band had already undergone their first change in line-up. However, they still maintained much of the personnel and style of their first album, "In the Court of the Crimson King".