Export all Audio tracks/Batch export in Cubase 5.5
To export all audio tracks in one go, you first have to set the locators (as you
do in an stereo file export).
Then, open the Audio Export window (File>Audio Export)
Mark Channel Batch Export, look at the read arrow in the illustration below.
Normally Cubase exports to stereo files to capture pan setting. If you want mono
files you have to select Mono Downmix. Look at the reed arrow below.