ANOTHER PROMINENT SUPPORTING ROLE: Sean Parker is aligned with the investment group led by Ron Burkle and Doug Teitelbaum bidding on Warner Music, All Things D’s Peter Kafka reported. Given his past exploits on the digital frontier, Parker’s interest in the company, expressed in a letter Burkle’s deal team submitted to Warner’s bankers at the beginning of the bidding process, is intriguing, to say the least. He’s working, as an adviser and investor, with Spotify, which has yet to come to terms with WMG or UMG, and some people have suggested to Kafka that the deep-pocketed entrepreneur (Forbes pegs his net worth at $1.6 billion )is trying to buy the label in order to get that deal done. But that theory doesn’t make much sense, the reporter concluded, because there are much cheaper ways to get Warner to license its music. More likely rationale: Parker believes that Warner’s catalog is undervalued, in part because of the digital revolution he helped usher in more than a decade ago. (3/14a)