Sonic Imprint Sensor
this device was developed during the years following the Jedi Civil War, as a way to provide a droid with a voice. By recording sound-bites and storing them in computer memory in such a way that they could be cut apart and spliced together in various ways, the sonic imprint sensor could be used to make the droid appear to be another, living being. The technology was outlawed in many star systems, and was never mass-produced.