SoundCloud, a startup focusing on audio-sharing in social media, has announced a new (and reportedly sizable) round of funding. The round, which was led by Silicon Valley venture capital firm Kleiner Perkins Caufield & Byers, may have been as large as $50 million, TechCrunch’s Mike Butcher reports. A SoundCloud rep confirmed all the details except the amount in an email exchange with VentureBeat this afternoon.