I wish to thank Christian Torrent for the recording.
Only one thing is certain: there was never any professional tenor called Siegmund Grünfeld who had a
career. So who was he? Other than the recordings listed below, he doesn't seem to have left any trace. A pseudonym? I don't think so;
record pseudonyms were typically necessary for singers who wanted to break an exclusive contract with a record company without
breaking it openly. Grünfeld, however, doesn't certainly sound like a singer different record companies would be fighting over.
A chorister? A voice teacher? Possible. I assume, also judging from the recording itself, that he was a gifted amateur.
Parlophon, Berlin 1921-01-28
2-2777 Tosca (Puccini): Nur deinetwegen wollt' ich noch nicht sterben P1166
2-2778 Bohème (Puccini): Dieses ist Mimì P1166
2-2779 Ballo in maschera (Verdi): Weißt du nicht unpublished
2-2780 Tiefland (d'Albert): Traumerzählung des Pedro unpublished
2-2781 Lustige Weiber von Windsor (Nicolai): Horch, die Lerche unpublished
Parlophon, Berlin 1921-02-15
2-2807 Guntram (R Strauss): Schlußszene 1. Akt unpublished
1134 Tosca (Puccini): Und es blitzten die Sterne 1134
1135 Rigoletto (Verdi): Ach, wie so trügerisch 1135
1136 Walküre (Wagner): Winterstürme wichen dem Wonnemond 1136
1234 Gute Nacht, du mein herziges Kind (Abt) 123
Discography source: Robert Johannesson's 78opera.com (alas defunct)