With Nuendo 3 you have to set up an audition bus in the VST connections panel (F4) under the "Studio" tab.

From the manual:

Nuendo 3.1 Operation Manual wrote: The audition bus is a special output bus used to monitor your mix, preview material for importing, listening to realtime audio exports and for Listen mode which provides standard AFL/PFL solos for channels in the mixer. Every project contains an audition bus. It is configured under the Studio tab in the VST Connections window. This should be connected to your monitoring system.

-Note-

Different buses can use the same inputs/outputs on the audio hardware! Be aware that assigning the audition bus to the same set of outputs as your default bus can sometimes cause clipping due to the special relationship of these two buses. By default, audio passing through the default output bus will also be heard through the audition bus. If they share the same ASIO output, the signals will combine in the audio card causing the levels to rise by 6dB and possibly clipping the D/A converter’s outputs.

"Nuendo 3.1 Operation Manual, p.21 wrote: The Default Bus and the Audition Bus are related. The default bus has its aux send #1 automatically routed to the audition bus. This aux send is enabled but set to -∞ dB. Depending on your setup, you will have to make the following changes to make the full use of the audition bus and the AFL/PFL functionality:

1. Set the level of aux send #1 (destination audition bus) on your default output bus to 0.00 dB. This will pass the complete mix signal of the default output bus to the audition bus. If you are using more than one output bus, you may need to create additional aux sends #1s to the audition bus, also set to 0.00 dB.

If you've got a Nuendo 3 manual, check out page 21 for more details.

Cheers :)

Thanks! I never would have figured that out in a million years!
There was no "audition" bus like the manual said but I somehow just set up another channel and got it working.

Dr_Willie_OBGYN, post: 371586 wrote: Thanks! I never would have figured that out in a million years!

No problem.

There was no "audition" bus like the manual said but I somehow just set up another channel and got it working.

Did you check under the "Studio" tab in the VST connections page (F4)?

Also, do you mean that you set up another output bus and it worked suddenly? In any case, the audition bus should be setup by default when you start a new project and if you only have one output bus, you should have no problem previewing audio for import. In later versions of Nuendo you get the "Control Room Mixer", which is used for controlling speakers, headphones, audition buses, click, and so on but it's only really useful for when you don't have a monitor controller.

Cheers :)