i’m just about to explore this more deeply,

but what it is is basically an override for the note length…
with it, you can set the length of the envelopes to a fixed value independent from the trig length, maybe for drum sounds where you don’t want keyboard presses to affect the length of a sound…

however, this is another case where the envelope/trig behaviour seems buggy to me… because with this paramter, you can only shorten the envelope gate time, i.e. the internal sequencer will use whatever is shorter… the trig, or this parameter… imo, it would be cool if the behaviour was such that if this parameter is anything other than OFF, it would define the length of a trig no matter what, basically turn the envelope into a one-shot… so you could trigger a longer envelope with a short note…