[2][3] Also in 1967 he recorded the bass arias of Bach's St Matthew Passion with Hans Swarowsky, the Vienna Academy Chamber Choir and the Wiener Sängerknaben, the Vienna State Symphony Orchestra, Heather Harper and Kurt Equiluz singing both the vox Christi and the arias.
[1] A review of Bach cantatas recorded with conductor Fritz Werner credits his singing: "The magnificent bass aria, ‘Der alte Drache brennt vor Neid’, in which soloist Jakob Stämpfli is accompanied by timpani and no less than three trumpets, is powerfully conveyed; Stämpfli is in commanding form".
[5] In 1963 he recorded Frank Martin's oratorio for soloists, choruses & orchestra In Terra Pax, written in 1944, with Ernest Ansermet conducting the Orchestre de la Suisse Romande.
[1] His students have included Klaus Mertens, Siegmund Nimsgern, Cornelius Hauptmann and Dominik Wörner.
[7] In 2007 the festival presented a performance of Bach's Mass in B minor with the ten singers of the Cantus Firmus Vokalensemble in the church of Amsoldingen.