Presonus Audio electronic Smart Compressor - Manual (Page 18)

CONTROLS & CONNECTIONS
17
PUMP - Make the Blue Max ‘pump up the prime’. A setting for
making the compressor pump in a desirable way. This effect is good for
snare drum to increase the length of the transient by bringing the signal up
after the initial spike. Very contemporary.
Threshold Ratio Attack Release
0dB 1.9:1 1mS 0.001mS
2