Korg Pa4X User Manual page 421

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Use the EQ controls
EQ Control
Low Gain
Mid (Middle) Gain
Mid (Middle) Freq
Hi (High) Gain
to create the equalization curve.
Meaning
Low frequencies equalization. This is a shelving
curve filter.
Middle frequencies equalization. This is a bell
curve filter.
Centre frequency of the middle frequencies
equalization.
High frequencies equalization. This is a shelving
curve filter.
Editing the Sounds |407
Value
-18...+18dB
-18...+18dB
0.100...10kHz
-18...+18dB