Since 1967 the Swiss baritone has very active as a concert and oratorio singer at concerts throughout Europe, Israel, the United States of America, Canada, Russia and Japan under prominent conductors (Raffael Frühbeck department Bourgos, Michael Gielen, Paul Sacher, Wolfgang Sawallisch, Horst Stein, Jesus Lopez Cobos).

He regularly sings at various festivals such as the music weeks in Lucerne, Zurich, Montreux, Donaueschingen, Ludwigsburg, London, Brighton, Breslau, Turin, Salzburg and Vienna. He holds the soloist prize of the Swiss Composers’ Association and in 1985 was awarded the Regio Prize for Music of the Upper Rhine Association for the Promotion of the Economy, 1997 Prize for Art of Basel-Land and 2007 Prize for Culture of the City of Wil. The Anton Bruckner-University in Linz nominate him as a Honorarprofessor.

The repertoire of his many records and radio recordings ranges from Machaut’s Mass to contemporary works. So far, he has sung in more than 100 premiéres. From the very start until today, his primary interest has been Lieder. Kurt Widmer has been awarded a number of prizes for records (Prix mondial du disque, Grand Prix du disque, Diaposon d’or Prix de l’Académie du disque français, Deutscher Schallplattenpreis, Preis der Deutschen Schallplattenkritik).