Like their cousins, the Trans-Siberian Orchestra, the musicians of Mannheim Steamroller have certain classical sensibilities. The band's name comes from an 18th-century German musical technique called "Mannheim roller." You can find clips on YouTube of Mannheim Steamroller singing a competent, medieval-style "O Come O Come Emmanuel" in Latin.

And it is in Christmas music that Mannheim Steamroller has, for more than 20 years, found its niche. The band plays carols with a New Age twist, a fusion of styles from Renaissance to rock. The group has produced a dozen different Christmas albums, exploiting the potential of Christmas carols both ancient and modern. The albums are all massive sellers.

Like the Trans-Siberian Orchestra, two divisions of Mannheim Steamroller are required to handle holiday demand. One of the two will be pulling into Shea's Performing Arts Center at 4 p.m. Sunday. The performance is directed and co-produced by Chip Davis, the group's founder and mastermind.

Admission is $35.50-$73 (box office or call 800-745-3000).

-- Mary Kunz Goldman