They’re back! The piteous Monster (Edward Parks), assembled from spare body parts sourced in morgues and graveyards, and the callous Dr. Victor Frankenstein (Terence Chin-Loy), who did the assembling, return in a new chamber opera. Words and music are by Gregg Kallor, an American pianist-composer as much at home in jazz as in classical music. To judge by clips from a workshop preview, Kallor is a skillful scene painter with a gift for fluent, neoromantic dialogue in song that you can follow without recourse to supertitles. (That ought to be a given, but it’s not.) —Matthew Gurewitsch