The amazing Swingle Singers, the French vocal group that grew out of the Double Six of Paris in the early 1960s, returns to Montreal for a concert at Place des Arts this month.

It’s the first in the Celebrity Series of concerts leading up to the 20th annual Montreal Chamber Music Festival series June 6-21.

The Double Six used overdubs for special effects on their LPs, but the Swingles, founded by singer Ward Swingle, evolved into an a cappella group that achieved a unique sound with innovative harmonies and arrangements.

In its current tour, the seven-member group offers an eclectic menu, mixing originals, standards, classical pieces, and world music. They call it From Bach to Piazzolla to Mumford and Sons, and include selections from their latest CD, Deep End.

The ensemble will also pay tribute to founder Ward Swingle, who died this year at 87.

The show is on March 12, 8 pm, at Théâtre Maisonneuve, Place des Arts. Tickets range from $20 to $69.

For the full concert schedule leading up to the 20th anniversary edition in June, visit festivalmontreal.org/en-ca/upcoming-show.