Bouncing audio from DAWs
One way to get audio out of your DAW and into Revoice Pro (then used in "stand-alone" mode) is to "bounce" a rendered section of certain tracks (perhaps containing multiple regions), creating audio files of those track sections. Multiple named audio files are created, one for each track of audio to be processed.
Bounced files can be mono, stereo or multichannel (generally less useful) files.
Bounced files can then be loaded into Revoice Pro using drag and drop.
For detailed information on exporting or bouncing audio, check the DAW's User Guides.