Here some repro steps I created back in 2009…
Nuendo 4.3, UAD 5.5, 3xQuads, OSX 10.5.8
I have scene the following behavior several times over the past couple of years using UAD plugins. Essentially I am occasionally seeing plugins that were saved in the OFF state (no DSP processing) not processing audio after session is loaded and plug in powered on.
- add a bunch of UAD plugs to tracks in Nuendo
- turn them off, no DSP running
- save the session
- close/reopen Nuendo
- load same session
- enable said UAD plugins
- plugins will pass DRY unprocessed audio
Drag the plugin to a new insert on a different track or toggle mono / stereo menu on plugin header.
I retried these same steps in Nuendo 5.1.1 on OSX 10.6.8 just now and was not able to repro, however I often experience this issue at least once or twice a day while working.
That said, these aren’t exact repro that always produce the issue, but as we all know that doesn’t mean a bug doesn’t exist. I’m happy to see others are too experiencing this too. I will gladly post exact repro if I am able to discover them.