BBC Proms2012Bernstein's MassBBC Four Duration: 1 hour, 55 minutesFirst broadcast: Thu 6th Sep 2012, 19:30 on BBC FourFirst transmitted in 2012. A musical ensemble from across Wales including orchestras, choirs and choruses perform Leonard Bernstein's Mass. Show more ContributorsPresenter:Petroc TrelawnyConductor:Kristjan JarviDirector:Ian RussellOrchestra:BBC National Orchestra of WalesOrchestra:National Youth Orchestra of Wales undefinedSeries Producer:Helen MansfieldSinger:Morten Frank LarsenSinger:Julius FooChoir:National Youth Choir of Wales undefinedChoir:Aelwyd Y Waun Ddyfal undefinedChoir:BBC National Chorus of WalesChoir:Massed Children's Choir undefinedMusician:Welsh College of Music and Drama undefinedGenresMusicClassicalFormatsPerformances & EventsBrandBBC PromsSeriesBBC Proms: 2012 Source: BBC Online