Here’s a new feedback today. He shared elaborated feedback between Fidelizer Free and Pro in great details below. You can also set Pro to work as free version by unchecking startup feature too.

Dear Keetakawee,

First, I must confess, I had a free version of Fidelizer for probably over 2 years before I now finally upgraded – Sorry! I first wanted to be sure the hardware / software combo will remain before I upgrade.
I’m using 2-core Celeron, fanless Win 10 PC with SSD and CD/DVD/BluRay, with a switching power supply. Media PC (is also used for movie watching (Netflix, Amazon Video), audio streaming (tidal), Video Conferencing (WebEx, ..)
PC runs Roon Server as player software (iPad Roon remote Remote + Remote desktop) Logitech Harmony + other Software, such as JRiver, ….. Audio Output is via USB with ASIO interface (see attached for digital setup)

Comparison Fidelizer pro vs standard (free) version:

I’m running Fidelizer in “purist” mode, with seemingly no detrimental effect on video performance

F-Pro kills about 20 windows processes vs. only 10 for the standard version (?)

Pro cannot be re-started manually while OS is running? Only started automatically at startup. – The standard version could only be started manually (if I didn’t pay attention 2 or more instances would run simultaneously)

Is there a difference between “high performance” and “high transparency mode” on my PC? Since my processor has only 2 cores –> I guess none?

My listening experience:

Without Fidelizer I often hear massive distortions (similar to harmonic distortions but not correlated with audio but rather noisy in character. It masks the details but also covers up bass and high frequencies. Music therefore sounds flat and annoying, emphasizing mostly mid range frequencies). After reboot it becomes maybe bearable, but it would get really bad after running windows for several days. Restarting Fidelizer, restarting would help for a while. But after a while I would have to reboot anyway.
The Pro version of Fidelizer is definitely more effective. The sound is much cleaner and more detailed, but also a richer and smoother sound (less mid range emphasis)

With my PC setting, Fidelizer is an absolute must. I’m considering the Nimitra with linear PS in the future, but tend towards a dedicated player (e.g. Aurender) for Audio. The neat thing about the nimitra is the bridge (network) setup. My concerns are that an external linear power supply may not be enough, as there are probably other voltages needed on the board (i.e. using DC/DC switches?) and 2nd (more important) windows will always have unnecessary processes running, even with Fidelizer. Ideally there would be dedicated hardware that completely caches and re-clocks the signal, but I have not heard about such a device that completely isolates the source – they all seem to let some noise through (according to reviews and personal experience), which is somewhat disconcerting.

Thanks for your excellent work. All the best for your business,

Regards,
Beat

I’m happy to hear he likes Fidelizer Pro enough to consider Nimitra server. The reason I created my own server was because I couldn’t find any satisfying server to use in my $100k system until this day so he sure will love hearing it. 🙂