Don’t miss on Frank Zappa, The Mothers, and Captain Beefheart in this once-in-a-lifetime event. — The time to discuss the trifecta has arrived. Frank Zappa, Captain Beefheart, and The Mothers of Invention are experimental rock legends. And for one night, they recorded their concert for all to hear. This month is the one-year anniversary of the Weird Albums Series, and mentioning their live LP is…