KORG ESX-1 - Manual (Page 50)

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TYPE ............................................................ LPF, HPF, BPF, BPF+
Selects the type of filter.
LPF (Low Pass Filter): Cuts the high-frequency region, making the sound
more mellow.
HPF (High Pass Filter): Cuts the low-frequency region, making the sound
sharper.
BPF (Band Pass Filter): Outputs only the region in the area of the cutoff
frequency.
BPF+ (Band Pass Filter Plus): Adds the output of the band pass filter to
the original waveform
If the sound does not change when you turn the knobs or switch the
keys, either those knobs or keys are not valid for this part, or a Mo-
tion Sequence ( ☞ p.68 “Motion Sequence”) is running.