Celtic music is a broad term that encompasses the traditional music of the Celtic nations, which include Ireland, Scotland, Wales, Cornwall, Brittany, and the Isle of Man. Celtic music is characterized by its use of traditional instruments such as the harp, fiddle, bagpipes, and bodhrán, as well as its distinctive melodies and rhythms.
Irish music is a more specific term that refers to the traditional music of Ireland. Irish music shares many similarities with Celtic music, but it also has its own unique characteristics. For example, Irish music often features the use of the uilleann pipes, a type of bagpipe that is unique to Ireland. Irish music also has a strong tradition of sean-nós singing, a style of unaccompanied singing that is often used to tell stories or express emotions.
In general, Celtic music is a broader term that encompasses a wider range of musical traditions, while Irish music is a more specific term that refers to the traditional music of Ireland. However, there is a lot of overlap between the two terms, and many people use them interchangeably.