Thanks for asking about Waverazor's Audio Input! The plug-in version does have this feature, just like the module. However, rather than patch cables, the audio routing depends on your DAW. Some hosts require you to use the Waverazor FX version, included in the installer. Others need you to sidechain. Here's a short video I did demonstrating the Audio Input:
https://www.youtube.com/watch?v=9CXLEu0feBg
And here's the user manual, available through Tracktion, our software distributor:
https://www.tracktion.com/training/manuals#waverazor
Hope this helps! Let us know if you need further information.
Cheers,
Taiho
MOK