SoundCloud has partnered with Dolby to offer algorithmic audio mastering. “Mastering on Soundcloud” provides a variety of “mastering profiles,” and seeks to bridge the gap between amateurs and professional-quality masters for a fraction of the price. When done by a skilled human, the final master can cost anywhere between $50 and $200 a song. On SoundCloud, that service is available for $4.99. If it works — and that’s not guaranteed — it could do what Instagram filters did to photography, and radically reshape the market. Of course, many “groundbreaking” products are ultimately worse versions of what’s currently available, and that may be the case here. But SoundCloud and Dolby are big players, and what they say they can do is tantalizingly cheap. In a new blog post, SoundCloud revealed th...