A synth plugin with controllable osc start times ?

Dear Reapers,

I am looking for a synth plugin that has the ability to adjust the start times of the amp adsr's of
it's oscillators.

So for a simple example:
I hit a note on my midi keyboard.
Osc 1 start's right away (it's amp adsr is directly triggered)
Osc 2 start's abit later, maybe .5s later (adjustable)
Osc3 start's even later, maybe .75 s later (adjustable)

Does this make any sense 2 you ?
Does such a plugin exist ?
I am on mac.

A synth plugin with controllable osc start times ?