Complex sentence: Tension developed between Parsons and the rest of the band, guitarist Roger McGuinn especially, with some of Parsons' vocals being re-recorded, partly due to legal complications, and by the time the album was released in August, Parsons had left the band.
Split into simpler sentences: Tension developed between Parsons and the rest of the band, guitarist Roger McGuinn especially, with some of Parsons' vocals being re-recorded (due partly to legal complications). By the time the album was released in August, Parsons had left the band.