Just tried out your CompLab jsfx for the first time, I really like it.
Question:
I know that this is possible via side-chaining, but would you ever consider allowing the attack to go negative in value? Pre-attack, if you will?
It wouldn't have to be much, to scratch the itch, maybe 10-20 ms.
Here is a mediocre mock-up:
As you can see in the example, the compression action is triggered 5ms before the real-time threshold would activate.