Original sentence: He moved on, however, to producing music after Nikka Costa's manager heard one of his gigs and introduced the musicians, this however is a misconception, Mark Ronson was forced to cancel the gig due to illness, Costa and Ronson were introduced shortly after through an acquaintance
Edited sentence: He moved on, however, to producing music after Nikka Costa's manager heard one of his gigs and introduced the musicians (this however is a misconception; Mark Ronson was forced to cancel the gig due to illness and Costa and Ronson were introduced shortly after through an acquaintance)