The Model 257, known as the Dual Voltage Processor, is two completely independent Control Voltage panners behind one panel. Insert control voltages in each input and pan between them utilizing a third control signal. Both sections include a .5V offset on one channel, a master offset ranging from OV-1V and attenuverting between -1V and 1V. Use the 257 to assimilate and manipulate all the varying types of Control Voltage in your system. With two CV panners in a one space, you are sure to have enough processing firepower for many system expansions to come. The Model 257 is essential to every DON B Oriented 4U System.