Often drawing on sources from medieval history , as well as the traditional stories and music of her native LOCATION@1 , she is best known for her operas and theatre works , although she has also achieved considerable international renown for her extensive catalogue of orchestral and chamber works .

She often uses medieval history as inspiration for her music , as well as music from her native LOCATION@1 , e.g. piobaireachd , which is a kind of variation form using small intervals .
