The requirements are almost the same as for the live version of the software, which you can find here:
https://help.audirvana.com/support/solutions/articles/202000050978
Note that the “incoming changes to macOS requirements” are for the beta version.
Regarding the processing, it shouldn’t require that much power. We ran some tests on our end and got good results with minimal performance impact, but the beta version is also here to check its limits.