Here you are:
http://www.sendspace.com/file/68qm2nIt's the whole four-hour broadcast, which came in mp3 form; bit-rate 128 kb/s (that doesn't seem very much, but no alternative appears to be on offer), sample rate 48,000 Hertz. I put the mp3 file inside a zip file, and the size of the zip file is 228,702,478 bytes.
If you have difficulty downloading a file of that size from Sendspace, just let me know and tomorrow I will extract just the section or sections with the opera.
You almost certainly know - but some members may not - that "
Speellijst" on the page you referenced means "Play List" and it lists the items contained in the file. The file starts at 7pm.
Thanks for drawing attention to this rarity!
. . .
Yes, I have now had another look at the "play list", and it appears to begin with a few bleeding chunks, and then the opera starts at the 20:04 mark:
19:05
Schreker, Franz Romantische Suite - III. Allegro vivace Gürzenich-Orchester Köln Conlon, James EMI 6 27973 2
19:17
Schreker, Franz Der ferne Klang - Wie seltsam das ist Moser, Thomas [tenor] Radio-Symphonie-Orchester Berlin Albrecht, Gerd Capriccio 60 024-2
19:25
Schreker, Franz Der ferne Klang - Grete! Hörst Du den Ton? Moser, Thomas [tenor] & Schnaut, Gabriele [sopraan] Radio-Symphonie-Orchester Berlin Albrecht, Gerd Capriccio 60 024-2
19:38
Schreker, Franz Die Gezeichneten - Uns're Zeit ist voll seltsame Dinge Connell, Elizabeth [sopraan] Deutsches Symphonie-Orchester Berlin Zagrosek, Lothar DECCA 444 442-2
19:50
Schreker, Franz Der Schatzgraber - Ah, fühlst du's, Holde Protschka, Josef [tenor] & Schnaut, Gabriele [sopraan] Philharmonisches Staatsorchester Albrecht, Gerd Capriccio 60 010-2
[an aria extracted as a foretaste?]
20:04
Schreker, Franz Der Schatzgraber - Voorspel, Eerste akte, Tweede akte Koor van De Nederlandse Opera & solisten Nederlands Philharmonisch Orkest Albrecht, Marc
[Prologue (i.e. Voorspel), First Act, Second Act]
21:20
Schreker, Franz Symfonie in a op.1 - III. Andante WDR Sinfonieorchester Gulke, Peter BRILLIANT 94237
[another bleeding chunk]
21:35
Schreker, Franz Der Schatzgraber - Derde akte, Vierde akte, Naspel Koor van De Nederlandse Opera & solisten Nederlands Philharmonisch Orkest Albrecht, Marc
[Third Act, Fourth Act, Epilogue]
23:02
Eisler, Hanns Wiegenlieder für Arbeitermütter: Als ich dich gebar Gisela May [zang] & Walter Olbertz [piano] Berlin Classics 0017962bc