brundlefly
Yes this goes back a ways - before X1 IIRC. But why do you need/want to render MIDI automation in real time?
To insure that on large orchestral mockups that the pace of the export doesn't exceed the ability of the streaming virtual instrument to keep up. Fast Bounce can go too fast for the streaming samples to keep up. With Fast Bounce unchecked, if it plays well within Sonar then it'll export exactly the same way. Plus, I always export with "Audible Bounce" checked to make double sure that everything comes out the way it's supposed to. Can't do that with Fast Bounce