There’s a lot of Stephen Sondheim in New York at the moment: the premiere staging of his last musical, “Here We Are,” and star-studded revivals of “Merrily We Roll Along” and “Sweeney Todd” on Broadway. And for one weekend this month, there was also one more show of his on: “The Frogs.”This endearingly weird, Aristophanes-inspired musical — created with Burt Shevelove and famously premiered at a Yale University swimming pool in 1974 — hasn’t been onstage in New York since a heavily revised 2004 revival that Sondheim conceived with Nathan Lane, who also performed the role of Dionysos. Few local institutions have the skill or interest to pull off “The Frogs” — with its bookish references and ironic-then-impassioned music — but it’s typical, delightful fare for MasterVoices and its artistic director, Ted Sperling, who mounted and conducted a concert staging of the musical at the Rose Theater. (Lane was there, too, now as a host guiding the audience through the show.)

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Persons: Stephen Sondheim, “ Sweeney Todd ”, —, Burt Shevelove, — hasn’t, Sondheim, Nathan Lane, Ted Sperling, Lane Organizations: Yale University, MasterVoices, Rose Theater Locations: New York