The audience at the June 19 matinee performance of Broadway’s Fun Home got a trip back in time when the sound system failed and the cast decided to go ahead and perform the entire show without amplification, as was once the standard on Broadway.

Led by Tony-winning star Michael Cerveris, the cast had to use their vocal training to project their voices in the in-the-round Circle in the Square Theatre to perform the 2015 Tony Award-winning Best Musical.

According to a production spokesperson, the “unplugged” experience resulted from the fact that ”the soundboard went down and they weren’t able to get it working properly in time for the matinee performance. Michael Cerveris made an announcement to the audience before the show began, to let them know they were performing the show without amplification and they were going to see a one-of-a-kind performance.”

The spokesperson reported, ”The audience loved it and was wildly supportive throughout. It was a unique, one-time-only thing that the audience got to experience.”

A survey of audience members who posted on social media seemed to agree, though some reported having difficulty hearing in spots.

The sound system is scheduled to be back to normal for the next performance, June 21.