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1: The PowerMate by Griffin Technologies was used as the knob like device. | Download Scientific Diagram
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Griffin PowerMate Bluetooth review: The Griffin PowerMate Bluetooth adds a sleek programmable control knob to your Mac (first take) - CNET
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Contour ShuttleXpress Contour Design ShuttlePROv2 Non-linear Editing System Griffin PowerMate USB Multimedia Controller Computer, PNG,
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