I dug this out from the Stockhausen thread. The fish should still be fresh:
<a href="http://www.divshare.com/download/2254713-059" target="_blank">
Karlheinz Stockhausen - "Trans" (2 versions)</a>
This is my vinyl rip of DGG catalog# 2530 726, released 1976.
side 1:
Symphony Orchestra of the Southwest German Radio, Ernest Bour [cond.], Karlheinz Stockhausen [sound projection] (Donaueschingen world premier October 16th 1971)
side 2:
The Orchestra of the Saarland Radio, Hans Zender [cond.], Karlheinz Stockhausen [sound projection] (Studio recording 1973)
<a href="http://www.divshare.com/download/2315911-0e2" target="_blank">
Stockhausen: Helicopter Quartet</a>
Yep, it's a string quartet performed in four separate helicopters.
wikipedia:The Helikopter-Streichquartett is one of Karlheinz Stockhausen's best-known pieces from recent years, and one of the most complex to perform. It involves a string quartet, four helicopters with pilots, as well as audio and video equipment and technicians. It was first performed and recorded in 1996. Although performable as a self-sufficient piece, it also forms the third scene of the opera
Mittwoch aus Licht