Xils lab PolyKB III User Manual page 43

6.6.5 Reverb
DELAY: Set the time before the reverberated signal occurs
LEVEL: Set the output level of the Reverberation unit
DAMP: Set the amount for damping ( Hi frequencies level roll-off )
TY: Use the three positions selector to choose your Reverb algorithm. The three Reverb algorithms are
( from bottom to top) : Large, Medium and small
HP: Insert a high pass filter for the input. The cutoff of this filter is 110 Hz.