Korg PS60 Parameter Manual page 38

Program Edit
Threshold [–99...+99]
This sets the AMS level which will trigger the EG reset.
When the "Threshold" is positive, the EG triggers when
passing through the threshold moving upwards. When the
"Threshold" is negative, the EG triggers when passing
through the threshold moving downwards.
Note: For several LFO waveform types, or if the LFO cycle is
fast, the LFO output may not always keep up with high val‐
ues such as +99 or –99.
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