At the moment, if I have two notes:
C-5
...
F#5
the MIDI messages sent to VSTis place the Note Off for the C-5 just just before the Note On for the F#5, which is fine. However, it'd be good to have a 'legato' mode -- essentially, the C-5 Note Off is sent a tick or two after the F#5 Note On.
I can do this manually by swapping constantly between two channels, but it'd be really good if this was a configurable instrument parameter. Basically, it would let you do slightly more interesting things with legato, especially on plugs that don't have legato functionality built-in.
It's worth noting that you can prevent a VSTi note from being cut by putting a Gxx (portamento) effect next to the new note. With monophonic plugins, this gives you legato, while with polyphonic synths, you get two notes playing at once.
Ah, nice idea! I'll give it a shot next chance I get.