Spend some time on the JRiver Media Center website. It might be of interest to you.
It does have a lot of options for “equalizing” and such. The software is a bit wonky but it is more than reasonably priced – and my files (without any signal correction of any kind via the software) are generally preferred when played with JRMC as opposed to Roon.
There are exceptions, depending on the recording. However, I tend to like the files on my network played through JRMC better.
I see most of the crabbiest folks on the Roon forum talking up Audirvana.
I figure if the internet goes down (which happens so rarely), I’ve got bigger fish to fry. I’ll just do something else. Can always play CD’s or records or take the mutt for a hike or go for a drive out in the country or read a book or listen to a podcast or canoodle with my girlfriend or play guitar or build a canoe.
Audirvana is quite likeable, including its presentation of streamed file resolution.
But, don’t wince, it doesn’t speak to my Bluesound Node, which does not support universal plug and play (requires my utility iMac on network with the Node to stream music from Audirvana on the iMac to the Node via Airplay).
Preferred, of course, would be a DAC with UPnP so that Audirvana program would connect to it.
There is a 30-day trial, about $70/year thereafter (half price of Roon).
My advice is if you are worried about losing your Internet connection, purchase a second/backup connection. How often do you lose your internet connection and when this happens approx how long is the outage?
My experience with Audirvana and DSD has been it can only catalog a limited number of DSD files before it can complete the catalog process. In my case it never finished. As such it is less than useful for me. I gave it weeks to try to finish and it never did. It uses a lot of processor while doing its never ending cataloging.