The pendaphone is a kinetic interface constructed by suspending an object from an inverted Gametrak absolution position sensor. In order to enable versatile installation of this interface I built a rig to suspend the tracker in the air.

Shown first is the standard ceiling-mounted method. I'm using a Wii remote as the pendulum bob. Obviously, this isn't a portable setup.

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By combining hardware from two speaker stands, I was able to get a pole that extends to considerable vertical height. On top of this is a combination of aluminum bars fixed to a flange. To eliminate the weight of the Gametrak box, the sensor device was removed and rewired to a Bitwacker running micro-OSC.

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Here is the completed mounting rig shown at the lower height setting (about 8 feet up)

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Now at the maximum height (about 12 feet up). A 35-pound sandbag is used to ensure the boom does not fall over.

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Here is the rig again, being used in combination with our spherical loudspeaker array. This is from the expo at Maker Faire 2009 at the San Mateo fairgrounds.

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