More about Repetitor on disLEXia (why is it called disLEXia? I thought it was a reference to law).
Is he the Paul Schneider who died in 1986 and is buried in the Poppelsdorfer Friedhof? Of course, there are other people called Repetitor, but apparently they are usually called Korrepetitor, in English coach (again) or repetiteur, who play the piano and help singers learn their parts.
Frau Klamser’s website is vera nicely written.