It is an annoying little bug, or a very strange feature.
Here is how to reproduce it:
1. Set up a rack that simply passes audio through.
2. Place that on a track that goes to another output besides the default (In my case spdif to my reverb unit) It would have output at 0db and input at -inf.
3. Set up a track with a wav file in it with a rack that sends audio. (input to 0db, output at -inf.) (dry is at 0, as is wet levels)
4. Now render.
What should happen (in my opinion) is that the audio being sent to the other output (spdif) should not be there in the mixdown.
Instead what happens is the volume on your input level in the rack is added to the mix.
So if you had some reverb on a vocal, when you render the vocal is much louder than it should be.
If you press mute on the return track it comes out normal. So I guess it is easy to work around - it just would be nice if this diddn't happen.
Today I rendered 10 songs for a client, went to start mastering and all my levels were messed up. It took me a while but I figured out that pressing mute on the track that is routed to the reverb unit fixed everything.
I can't see this as being an intentional feature? Audio being sent to another output should not effect the audio on the main outputs - and if it is intended to work this way it should effect playback as well as rendering.
Since I have been using outboard gear (thus multiple outputs) I have noticed alot of strange behaviour (like the master effects sections gets parralized with some effects, and at best is unpredictable)
I hope these are being addressed for the next release.
