Listen to Ar Hyd y nos online. Ar Hyd y nos is a Welsh language song and is sung by Bryn Terfel, Welsh National Opera Orchestra, Gareth Jones, The Black Mountain Choir and The Risca Choir. Ar Hyd y nos, from the album A Song in my Heart, was released in the year 2007. The duration of the song is 4:46. Download Welsh songs online from JioSaavn.