The AU Monitor plug-in enables you to listen to Revoice Pro's output through the DAW's audio outputs.

In Logic, create a New Software Instrument Track.


The track will be added to the list of existing tracks in the session, here shown as Track 4 (Inst 1):


Make sure the track is selected, then click on the the Inst button on the mixer strip for that track, to show the menu of available instruments, and selected AU Generators > Synchro Arts > Revoice Pro Monitor > Stereo:


The Inst button now shows "Revoice Pro":


To enabling the Monitor via this track in Logic, switch it on using the Monitor Enable button in Revoice shown ON below:

Monitor Switch shown on

If you switch this Monitor switch OFF, then the output will be sent to the directly connected device set up as the Audio Output.