His discography includes works of Johann Sebastian Bach, Dieterich Buxtehude, George Frideric Handel, and Claudio Monteverdi.
After he returned from a prisoner-of-war-camp, he started teaching and singing for the Bayerischer Rundfunk (Bavarian broadcast) in programs of early music and new works of Munich composers such as Joseph Haas, Hermann Zilcher or Wolfgang Jacobi.
[1] In 1948, Franz Kelch was the soloist for A German Requiem of Brahms with the Münchner Philharmoniker, then Bach's Mass in B minor with the Heinrich-Schütz-Kreis conducted by Michael Schneider, and Beethoven's 9th Symphony with the Bamberger Symphoniker and Joseph Keilberth.
[2] He was a bass soloist for recordings by Fritz Werner and the Heinrich-Schütz-Chor Heilbronn of the Bach Passions, the Mass in B minor and many cantatas for Erato.
In addition to his extensive concert activities as a lieder and oratorio singer in Germany and Western Europe, Franz Kelch taught from 1953-1978 at the Leopold-Mozart-Konservatorium Augsburg[1] (now the Leopold Mozart Center).