Peavey PROGRAMMABLE EFFECTS PROCESSOR 4000 Operating Manual page 3

DELAY INCREMENT (+)/DELAY DECREMENT (-) KEY (K)
0 to 127 milliseconds 0.1 millisecond steps
128 to 1023 milliseconds 1.0 millisecond steps
1024 to 2047 milliseconds 2.0 millisecond steps
2048 to 4095 milliseconds 4.0 millisecond steps
PROGRAM CONTROL SWITCH MATRIX
BANK A/B SELECT KEY (L)
PROGRAM KEYS 1 THROUGH 5 (M)
SYNC CONTROL KEY (N)
FADE CONTROL KEY (0)
HOLD CONTROL KEY (R)