Pipe bands have long been enormously strong in Ulster, in fact the Northern Ireland branch of the Royal Scottish Pipe Band Association is larger than any of the branches within Scotland itself. The Orchestra uses Highland Pipes, sometimes in unconventional ways, such as in assocation with Lambeg drums, and also Lowland Small Pipes, which are more compatible with the sound of the fiddle, and sometimes more suitable for indoor venues.
The distinctive repertoire of piping tunes has also influenced fiddle and accordion styles within Ulster.
You'll find some basic info. on the ‘Great Highland Bagpipe’ here: