CO Caspar's devices

CPU - Central Processing Unit
is the configuration of several digital effect devices that are controlled by means of a line mixer.  The processed signals have concrete origins, and are thus neither electronically created nor sampled, but are real-time acoustic microphone inputs, and/or play-back concrete or modified recordings.  The programs of the processors are adjusted to each other.

FBU - Feed Back Unit
consists of an amplifier and an effect module, and various directional microphones and loudspeakers.  Acoustic loops are produced in a controlled fashion by means of altered resonance spaces and reflected interferences.  As microphonal short-circuits, they arise externally acoustically and/or are provoked by external sources of sound.   Several feedback systems can be combined with each other.

TVN - Steel / Tube Violin
is a metal soundtool made of sheet metal, steel and aluminum, purchased in a hardware store, assembled, screwed and rivetted.  The sound is material, it sounds not acoustically but picked up, and is created by plucking, rapping, caressing, scratching, or rubbing with a polyester bow, or by means of the voice.  The sonic output of the material substance drives the input CPU.

RSL - Rohrschleuder (tube-whirler)
SKN - Schlauchknatter (hose-crackler)
M/SPM - Mono/Stereo Pneumat (dto MBL/DBL)
are soundtools made of blowers, polyester tubes and hoses, latex membranes or hoses, of steel bars and chains, purchased in a hardware store, assembled, screwed, and rivetted.   they light up electrically yellow, synchronised with their volume.  The sound is directly material, is by regulated compressed air flowing, rhythmic, multi-frequentially atonal, random polyphonic.  They sound purely acoustic or/and microphonally amplified.  they are played by manipulating the latex or the suspension.  their pneuma alternates offensively as a duo, trio, multiplex system.

DPO - Deka-Pipe-Organ
is a hanging blower whose air flow branches into two or more hoses.  Each hose ends in a cylinder.  On the opposite end of the cylinder, a latex membrane distributes the flow among 10 bent pipes.  The installation uses 5 blowers and thus 50 pipes.   The tuning of the overall acoustic sound is in 50 variations of the upper frequencies, with their interferences, as produced by the varying columns of air.

WTS - Wind Tones Steel
is a hanging, open-air installation that uses the wind to provide umpulses for producing sound.  It consists of 9 suspended sheets of flexible steel (75 x 100 cm).  The distortion of their forms can be experienced acoustically.  Using a pickup, the impulses are also electronically modified.

DIDGE
is a stiff hose about 1m long.  When it is blown, the aural impression resembles that of a didgeridoo.

LENS - Fresnel Scope
is a flat relief slab of glass with a large diameter, consisting of prismatic ring zones with a common focus.  Depictions give rise to refraction images in which the refracted rays of light intersect at a point in finite space.