Boomkat Product Review:
'Kippschwingungen' finds Frank Bretschneider returning to a rare and obscure bit of East German electronic equipment with compelling results. In 2007 Frank was invited to compose music for the Subharcord, a unique electronic instrument developed in the 1960's for the creation of "special effects" at the RFZ, the technical centre for radio and television of the East German postal service. Of the eight machines originally made only three survive to this day in Vienna, Trondheim and Berlin, which could be considered as the Soviet counterparts to the Mixturtrautonium made famous by Oskar Sala. Given access to a model, Frank Bretschneider spent two weeks exploring the instrument, finally deciding to mainly use the extraordinarily narrow-band "Mel" filter and built in "Rhythmisierungseinrichtung" (rhythmization installation) coupled with a Clavia Micro Modular to generate alternating sinewaves on the ring modulator input of the instrument. Performances in 2007 and 2011 followed before Bretschneider revisited the original recordings, which he edited and added new overdubs for this CD to create a wormholing 37-minute experience, deftly and intently exploring the machine's limitations to discover mind-warping cosmic turbulence and penetrate extraordinary, otherworldly sonic dimensions whilst somehow sustaining a tangible narrative arc. It's more "out there" than either his 'Rhythm' or 'Komet' albums and strongly recommended.