Metallica Release “Lux Æterna,” First New Song in Six Years , Metallica have returned with their first new song in more than six years, “Lux Æterna” — the lead single from the band’s just announced new studio album, 72 Seasons, arriving April 14th. Considering the band’s pace of releasing new music every 6-8 years, a lead single drop is certainly a holiday treat for Metallica fans, not to mention a cause for curiosity. Ever since St. Anger, Metallica have been a wildcard, sonically speaking. Those measured gaps between releases have resulted in each subsequent album having a vastly different musical personality than the one before it. Music News & Videos