Well, LH, Bombarde & Biniou are the two instruments that always play together in Breton dance music, (an dros, hanter dros, dance plinns, etc.). The Bombarde is somewhat like an oboe and has a high-pitched reedy sound. The Biniou is the Breton form of the bagpipe, played by such folks as Patrick Molard. The Biniou is also very high pitched. Together, they should not listened to at high volumes, as they would probably rupture your eardrums. But I think they are awesome.

Breton bands such as Bagad Breig and Bagad Kemper are massed Biniou bands, that play like massed Highland Pipe Bands, except for the higher pitched instrument. There is a lot of it on Dan Ar Braz's album Héritage des Celtes that has folks from Brittany, Scotland, Ireland, England, and Galicia playing together. "Call To The Dance" features a Biniou massed band (with harmony!) along with Dan Ar Braz playing the traditional melody on his electric guitar.

--Matt