The Opera Buffs are set to give the world-premiere of six mini operas at its New Music Pop-Up hosted by the Sierra Madre Playhouse. The new works are “A Tall Order” by John Greer and Sheri Wilner, “Remembrance” by Jean Ahn, “Rapture” by David Wolfson, Luca Sutto’s “Lost in the Scroll,” Roydon Tse and Rachel Gray’s “Grief House,” and Zac Flasch’s {…}