Warner Music Group, like other labels, isn't settling for rising streaming revenue. If it's going to take over records sales, companies want to be adequately compensated for all music that's being streamed. That includes from so-called "safe harbors" that allow users to upload songs, like YouTube.

During Warner's earnings call, CEO Stephen Cooper said it's crucial to "ensure a fairer correlation" between royalties from paid subscriptions and those places where people can listen for free. He went on to say that Warner had made its position known to both the European Commission and the US Copyright Office. As streaming continues to grow and physical sales likely continue to decline, this battle over the "value gap" will certainly heat up.