Hi, I don't know if I always had this problem or not, but I recently noticed it working on a new song.
I am using Sonar 8.5 and Trilian Bass as a VSTi.
Every time I play back the midi or bouce the midi to audio, the levels are usually different?>
Not drastically, but it's almost like the VSTi is playing at a different level on some notes each time.
I tried it with Absynth 5 as well and I get the same result. It always bouces differently. Any ideas or help?
Thanks

What kind of a sound are you using? Many synth sound presets include modulation by LFO to make them lively, and so they never give the same bounce twice.

If you're bouncing/freezing to mono, as I assume you are with a bass instrument, 8.5 does have a bug in which mono bounces are 3 dB hotter than they should be. I've just gotten into the habit of automatically trimming 3 dB off my synth bass tracks after freezing or bouncing.