1. Mute all tracks that you don’t want to convert.
2. Click the Track view Tracks menu and choose Bounce to Track(s).
The Bounce to Track(s) dialog box appears.
3. In the Destination field, choose a new or pre-existing track to put the new audio data on.
4. If you’ve saved presets from previous bounce operations, you can choose a preset from the Preset field.
5. In the Source Category field, choose Tracks.
6. In the Channel Format field, choose mono if you want a mono track, stereo if you want a stereo track, and split mono if you want to create separate mono tracks.
7. In the Source/Buses field, choose the output bus(es) that the soft synth tracks are using (usually the main outputs).
8. In the Mix Enables field, make sure all choices are selected.
9. Click OK.
(From the Help file! ;O) )