Today, producers are more likely to multi-task. They are good engineers as they mostly started as an engineer. And they're very good editors. Part of getting a great performance is editing what wasn't or cannot be played in the session itself. Sometimes editing is the only way to bring out a certain sound in a performance. You'll often find that a good producer with good engineering skills prefers to be completely in control to guarantee the best results. A music producer's job is essentially to make sure that a song is well recorded and well produced.