Complex sentence: It was their first album to be released exclusively on Capitol Records; their previous effort, "World of Noise", was re-released on Capitol after its introduction through the Portland, Oregon based label, Tim/Kerr Records.
Split into simpler sentences: It was their first album to be released exclusively on Capitol Records. Although their previous album, "World of Noise", was released on Capitol, it was originally released on a Portland, Oregon based label, Tim/Kerr Records.