The Synthrotek Verb is a reverb module like no other. This PT2399 unit offers a warm tape-saturated spring reverb sound, but the added flair of subtle modulation truly makes it shine. The input gain knob drops the input amount back to give cathedral-like sounds when the mix is high. Turn the modulation knob manually for pitch bends; patch in a slow LFO or envelope CV to emulate pitch bends reminiscent of a tape echo with a broken capstan. The mix knob is a very fast-responding cross fader circuit which allows audio rate inputs for further FM-like modulation. Add a subtle amount of reverb or crank the mix past 3 o'clock to knock the reverb signal into the rails.