They sing live during performances. The reason is simple:
* The magic of live theater: Broadway is renowned for its live performances. Hearing actors sing live adds a level of authenticity and excitement that lip syncing can't replicate.
* Skill and talent: Broadway performers are highly trained singers and actors, capable of delivering both the acting and vocal demands of the show.
While some productions might use pre-recorded tracks for certain musical elements, such as background vocals or sound effects, the main singing and dialogue are always performed live.
So, rest assured, when you see "Young Frankenstein" on Broadway, you're getting a fully live musical experience!