I designed and created an installation consisting of five electromagnetic microphones I made, hanging in a room picking up the unheard frequencies from electronic machinery around the space. Each microphone was allocated its own speaker placed approximately a meter behind it. I built an interface in Max MSP designed to randomly choose a microphone to fade up, this will play for a certain amount of time then fade out. This process overlaps so there is around three playing at a time. Every two minutes the audio would fade into a chosen group of effects; phasor, pitch shift and reverb. The parameters of these effects were randomly chosen every two minutes. I made my own electromagnetic microphones based off LOM’s Preizor which is an open-source design. I used Adobe Illustrator to draw out the shapes I needed to cut out on the laser cutter, I decided at this point I could easily scale them up and down and make different sized microphones. I was interested to see whether the size made a difference to the sensitivity and/ or range of the microphone. I later found that the size doesn’t change it too much but it is in-fact the amount of rotations of copper wire which makes the biggest difference. The open source instructions suggested how many rotations to do which is around 333. LOM have a machine to do this, I made my own device to spin the wire which didn’t have the ability to count the rotations. Some of the microphones have more rotations and some have less. I wanted the visual element of this piece to play an important factor, I used bright orange XLR cord for each microphone which created a beautiful contrast with the shiny black acrylic.