Splitting microphone signals so they can be sent to both a live mixer and a recording interface simultaneously.
Designed in the late 1970s by the now-defunct Visual Audio Corporation (VAC), the unit was intended for educational broadcast television and modular synthesizer studios. Its “Serial” designation refers not to a digital communication protocol (despite the anachronism), but to the cascade topology of its internal amplification stages. Unlike parallel splitters that merely duplicate a signal, the Model 12 Serial processes each output sequentially through a chain of variable-gain amplifiers. visual audio splitter amp- joiner 12 serial
