On the occasion of his 85th birthday on February 9, 1994 WERGO has published Harald Genzmer's two Trautonium concertos on CD. Both of them - historical recordings from 1950 and 1958 - had already been published in 1986 on vinyl-records. Now, the newly developed Digital Sonic Solution No Noise System has considerably improved the sound quality. Oskar Sala is well-known for his sound background of Alfred Hitchcock's film "The Birds".