== Em de^ rękxistin +

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This excerpt of audio documentation was created by recordering the summed outputs of a Mackie 1604 mixer,
then mixing a recording made sitting in the installation with a Rode M3 microphone

==Em de^ rękxistin + is a site specific installation with custom software, conductive copper table surface, chairs, conductive copper beverage cups custom lamps with speakers. Output is activated and altered by sound, motion and viewers movement of cups on table surface.

Installation materials: Found table modified and fitted with custom electronics, found lamps modified and fitted with speakers then suspended from ceiling, chairs, rug, cable, 8 microphones of various types, shapes, and sizes. Computer, Motu 8 channel soundcard, Max/MSP real-time software, Doepfer Drehbank - CV>MIDI controller, Crown amplifier.

The table functions as an interface to control the sound processing through a computer. When you move the specialized cups across the table's surface it connects certain contact points that each carry a specific value and sends that to a computer. When the computer receives a signal change it will somehow use that to alter the sound in some way. This could be something simple and immediate like panning the sound, or it could change the whole nature of the sound altogether by adding or cutting out frequencies. It is a smart system because it reflects certain behaviors of the individuals in their conversation and reacts to those behaviors. If someone is drinking their beverage really fast, they are constantly changing the signal to zero (by lifting there cup) so the computer responds to that and changes the sound accordingly. The system can also track signal changes for as long as a few minutes to provide a subtle layer of interaction where the relationship is not one to one but tracks trends that are longer lasting. In addition to the copper contacts there are four photocells that track light and shadow on the table. These cells are oriented so that when someone leans left or right, the light will shadow differently. If the table sitters are not moving their cups but only gesturing with their hands or bodies, the system will respond to the light and shadow falling across the table. The goal is to provide people with a specific sound environment based upon their conversations and interaction with someone else.

The copper contacts function on an X &Y axis coordinate system. Each Y (vertical) segment of the grid specifies which output jack voltage will follow. Each X (horizontal) segment of the grid specifies the value to send. The Y segments alternate between two jacks, so that the first Y segment sends current to Jack 1 and the next vertical segment sends current to Jack 2 alternating so on and so forth. In addition to the copper contacts there are 2 photocell resistors that always send their voltage directly to Jacks 3, and 4. The system is doubled for the other side of the table giving a total output of 8 separate jacks.

Each X (horizontal) segment on the grid carries a specific resistance value. The resistance starts out low in the upper left corner and travels increasingly higher at each consecutive segment traveling to the right. The next row down starts with a value slightly higher than the last segment on the row above it and also travels increasing to the right (book read format). The photocells values are defined by how much light shines on them. All the output jacks on the table send a range of voltage from 0 -5 volts.

The entire table is powered with 5 volts DC.

The interface begins with the cup (conductive bridge) being placed between an X and a Y segment on the grid. This tells the circuit what value to send and where to send it. The geometry of the cup and the grid is constructed in such a way that it is possible to bridge one, two three, or four contacts (see image). This means that values can be sent to one jack or two jacks simultaneously. Also values (X segments) can be crossed giving a new value. The table system sends voltage out of 8 jacks that run into the voltage inputs on the CV->MIDI interface which changes the signal from a voltage value to a MIDI value across 8 different channels.

Sound Process/Output
Eight microphones are placed throughout the building and collect sound from other sound installations, conversations, ambient noise within the gallery and city outside. First a mixer balances the microphone signals and then sends the audio in 8 channels to the soundcard to be processed. The computer uses real time audio software custom designed to filter, pan, delay, cut high, cut low, change reverb etc. The extent of the change is based upon the input from the converted MIDI messages received from the table. All the sound is then output four channels giving a quadraphonic channel sound environment.