That's a relatively ambiguous question. How does the Sibelius volume compare to your normal system audio and playback in iTunes?
One thing that will give you a bit more juice can be found by going to your instance of Kontakt Player 2 in which you have VDL loaded (can be accessed via the mixer or Playback Devices). Then click on the Options tab and set the default loading volume to 0db instead of -6db. I think it should be doing this by default, but I'm not sure.
See attached image.
Legacy Forum Post
over 9 years ago
If you haven't already, I'd suggest updating your VDL library to version 2.5.2. It has a better volume presence than the 2.5 library out of the box.