1. Automatic Devices Company. Website. Manufacturer of traveler tracks, both manual and motorized. The two most popular products are the SilentSteel®280 and Besteel®170 U channel tracks. 2. Manufacturer of audio patch panels and other data connectivity solutions. ADC: Network Infrastructure, Copper, Fiber, Wireless, Enterprise, Services. 3. Analog to Digital Converter. A computer hardware interface used to convert either an XLR or TRS connector to USB or FireWire.