Tittle: Waves
Year: 2006
Construction: Two tubes made of PVC and two cylinders made of polished steel for the modules of the motors, two ventilators 12V to internal ventilation, wood pieces for the mechanisms support, two axial bearings in order to avoid the torsion and damage of the rope, gauze cloth to protect air entrances of the ventilation, five metres of elastic rope with 4mm in diameter, two pedestals made of DM.
Operation: When there is no presence detected starts the “stand by” mode, disconnecting the motors, creating a line between them, and reactivating itself instantly when there is a presence. The installation keeps the rope movement by means of the anchor points rotation in different frequencies depending on the audience presence, creating alterations in the wave. The vibration produced in the rope is amplified as it is cut with the air, living as a final result an audible setting based on the piece activity. The more immobile we are in front of the piece, the more slow it will move the rotors of the rope, creating symmetrical waves and stable whistles; generating irregular charts, and stronger abrupt sounds at the same time when the movement of the audience increases.
Use: The installation is totally autonomous and it needn’t be maintained. It has only one general switch which control the power in 220v.
Requirements: Zenith light to light up the rope intensively. Black background to provide a good vision of the rope. Six dead weight sacks to be placed inside the pedestals (three at each one), so that they can be settled. Electric connection 220v. Passable space as to the installation of 10x5m.
Sound: Live acoustic created by the rope vibration.
Programming: Processing. Hardware: I/O board Arduino, triacs board, two motors 220V 170W 3vel, eight PIR sensors.
Interface: Detection of the public presence through infra-red sensors. Detection: Each module has four sensors in the base of the pedestal.