PLATERES is a 4-delay feedback delay network reverb (FDN) commonly seen in old reverb dsp designs. Modulation of the delay time and all pass filter time has been used in many designs to break up resonances from the ringing of the all pass filters. But what is it about these ringing resonances which are avoided to create a more natural sounding reverb? PLATERES can be used as Reverb, Metallic Resonator, or Feedback-Dronevoice.