Listen to Tristan Und Isolde: Act I, Part One online. Tristan Und Isolde: Act I, Part One is an English language song and is sung by Philharmonia Orchestra, Chorus Of The Royal Opera House, Kirsten Flagstad and Ludwig Suthaus. Tristan Und Isolde: Act I, Part One, from the album Wagner: Tristan Und Isolde, was released in the year 2010. The duration of the song is 45:09. Download English songs online from JioSaavn.