The RX Monitor plug-in acts as an instrument in the DAW/NLE that plays audio from RX through the driver being used by the host. This enables you to actually hear the audio you’re editing in RX without having to close your host, particularly useful if you’re using RX Connect. Additionally, if you’re editing a file, but you want to hear the end result in the context of any post processing (perhaps you have other mixing plug-ins running in realtime), RX Monitor will be able to play that audio back in context.