Dual is an album by four acclaimed Irish and Scottish musicians: Éamonn Doorley, Muireann Nic Amhlaoibh (both prominently of Danú), Julie Fowlis and Ross Martin. The artists released the album in October 2008 on their official websites. The album was planned to project the similarities and differences between the Irish and Scottish Gaelic song traditions. The album features Scottish waulking songs such as Alasdair Mhic Cholla Ghasda, and oddly an Irish Gaelic equivalent to the Gaidhlig Puirt a Beul. The songs are set in a traditional/folk accompaniment, very different from the recorded versions of a few of the songs by the likes of Capercaillie and Clannad.