Here's an interesting one. It appears to be an audio recording of the TV Broadcast from Dusseldorf 1971-06-13. My tape was marked as Dusseldorf 1971-06-17 Which coincides with the broadcast date according to http://www.covers-at-an-exhibition.de/Tourinfo/1971/tab71.html. It does sound to me like audio from a broadcast although there's not much high-end, but still sounds pretty decent. Check the sample.
****** 16 bit / 44 mz ****** (CD Version)
Emerson, Lake and Palmer
June 13, 1971 (1971-06-13)
Philipshalle
D�sseldorf
Germany
TV performance "Supergroups in Concert"
Broadcast 1971-06-17
Keith Emerson - Keyboard and Synthesizer Wizardry
Greg Lake - 'The Voice', bass, guitars
Carl Palmer - Percussion Extraordinaire
01) [16:11] Take a Pebble
02) [07:15] Knife Edge (First 2:00 are a little warbled)
03) [04:48] Blues Jam
04) [05:31] The Barbarian
05) [19:18] Rondo (w/ drums)
06) [05:06] Nutrocker
Total [58:09]
~ Bonus ~
07) [04:35] Knife Edge // fade - Beat club 1970-11
Lineage: TV Broadcast > ? > cassette trade in 1997
Transfer: Sony TC-WE475 > M-Audio Microtrack II (24/96) > Wavelab (tracking and tweaking) >
Flac (level 8) > you !
whotrader-0391-elp-71-06-13-44