(MIDI) Attack intonation JS

Hi! Is it possible to create a JS plugin that create automatically a slight variation of pitch during the first ms of a midi note? It would be a wonderful humanization tool for the guys who use samples without round robin. Vienna Instruments Pro does that as you can see in this video (5m 37s): I don't want something so complicated but a JS with some pitch waves which shift automatically would be amazing! So, is it possible to do it or not?? Edit: I've just seen the spectro-filter-paint JS. Isn't possible to use the same GUI?? It would be perfect for this purpose...

I think a midi lfo might do just about what you want - if having some re-sync for each note. But otherwise the jsplug could send pitch bend according to rules made as each note on comes. Humanizer here do some of this mentioned:

I've done a mockup, not really beautiful but comprehensible I hope...

Yes! A multiple pitch envelope generator! (Edit: I'm not crazy, I'm replying to a guy.... who deleted his post :D) The best would be a third parameter that allows to choose the proportionality curve because with some instruments the intonation is much more difficult at low velocities. The very best (maybe I'm dreaming, but it would be more advanced than the VI Pro option) would be something like this:

the problem with the lfo is that the vibrato will be exactly the same for each note... it's not really "human". Is it possible to do a pitch envelope with ReaScript??