A suspicious vibrato sparked a bomb scare during a performance by the Vienna Symphony Orchestra — before a buzzing sex toy was discovered in a concertgoer’s checked bag.

The concealed device in the cloakroom began vibrating to the famed orchestra’s rendition of Richard Wagner’s works “Siegfried Idyll” and “The Valkyrie,” according to The Local.

Fearing a terror incident, police rushed to the Vienna Konzerthaus, where an explosives expert examined the suspicious bag, found the adult toy and turned it off before it caused a classicus interruptus in the concert hall.

“After the performance had finished, the suitcase was handed over to its owner and his lady friend,” police said in a statement, according to the daily Kurier.

“They were informed of the incident and the officers wished them a nice evening,” police added, wink wink.