The aural shapes concert is purely acoustic, so it needs an acoustically space to be
played. Preferably the audience should be completely surrounded by the instruments.
For the instruments and wind machines is 230 Volt 16 Amp necessary. For special
instruments is a 400 Volt three-phase current connector necessary (compressor and
Setup Aural Shape-Konzert
The setup can generally be done in the morning or at noon, if the
concert is to take place in the evening.
In order to play these machines, Schläger initially used an industrial control system by Klöckner Möller, which is still
in use for the regulation of waterworks, railways, and traffic lights. However, this method of programming proved to be
cumbersome, he therefore decided to apply the data transfer protocol MIDI (musical instrument digital interface) which
offered him much more convenient options. However, it is necessary to interpose a laptop with sequencers, compositional
and notation programs between the two. With MIDI the programming of the operations of motors and magnetic pickups is
enabled. Although the sound machines are then ready for use in performances and in installations, they are not considered
completed, rather they are subject to an ongoing process of modification, a constant fine-tuning and adjustment of their
sound characteristics. The construction of a machine is not a completed process, but a never-ending exploration of the
best-possible form. On a pragmatic level Christof Schläger knows in advance the kinds of components he requires and he
will search until he finds the precise part he is looking for; usually it will require some physical alteration to fit
into the structure of his sound machine. On an artistic level, while Schläger has a sound in his imagination and which he
strives for, he is not rigid in his intention. The sounds evolve and come into being in the interplay of imagination, the
constant adjustment of the sound machines, and the listening experiences of the sounds produced.