The Symetrix 528 Voice Processor contains five functions needed for microphone signal processing: mic preamp (with phantom power), de-esser, downward expander, compressor/limiter, and parametric equalizer. The 528's "normal" signal chain includes all five functions, but the de-esser, the dynamics processor (expander/compressor/limiter), and the parametric EQ/notch filter maybe individually bypassed with front panel switches. Each section is brought out to its own set of normalized rear panel terminations, so any signal routing possibility is provided for, and patch bay installations are supported.