Complex sentence: The band began at Bell Studios as a studio band for other larger acts managed by Morty at the time, but soon the relationship evolved into actual productions by the band on the Indie labels of MELL, JENN, & Frankie.
Split into simpler sentences: The band began at Bell Studios as a studio band for other larger acts managed by Morty at the time. The working relationship however soon evolved into actual productions by the band on the Indie labels of MELL, JENN, & Frankie.