Nikolaus harnoncourt leads the arnold schoenberg chor and the concentus musicus wien in live performances from the ouverture spirituelle concert series recorded at the salzburg festival in 2012 focusing on religious themes and musical works the concert features performances of mozarts litaniae de venerabili altaris sacramento k 243 and missa longa in c major k 262 the featured soloists are sylvia schwartz elisabeth von magnus jeremy ovenden and florian boesch