Known at the time as a pop producer, he brought a more heavily synthesised sound to Rush. After reluctantly declining to work with Rush for their albums Presto and Roll the Bones, he later returned to collaborate with the band for Counterparts and Test for Echo.
A renowned music producer at the time, specializing in pop music, joined Rush and brought a more electronic sound to the group. Initially, he was hesitant to work with them on Presto and Roll the Bones, but later decided to collaborate again with the band on Counterparts and Test for Echo.