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Are you computer audiophile? If so, Fidelizer will help you enjoy the music on computer even more.

Fidelizer 7.9 released – Improved compatibility with AudiophileOptimizer and Windows XP

After releasing version 7.8, Fidelizer’s compatibility with Audiophile Optimizer’s default shell feature is improved a lot. However the solution isn’t 100% fixed yet so this version will resolve the remaining cases.

I also fixed Windows XP issues on some cases and added Steam/Origin compatibility to resolve slow down issues for some customers who didn’t set Steam/Origin as music player application.

My birthday is coming up soon and I hope to make public announcement about this update on my birthday. I’m busy with Portable Products section to add more devices with approval from them right now.

Changelog for version 7.9

-Fixed program execution bug with some Windows XP Editions

-Added music player application into audio process group so you can choose Steam/Origin to keep its performance
-Fixed program execution bug with some Windows XP Editions

-Added music player application into audio process group so you can choose Steam/Origin to keep its performance
-Fixed program execution bug with some Windows XP Editions
-Fixed remaining bugs with Fidelizer Pro as AudiophileOptimizer’s default shell

Download: Fidelizer 7.9
Upgrade: Fidelizer Upgrade Program

Fidelizer Plus/Pro users should be received a mail about update and download link by now. If you somehow didn’t receive an update notification as I received some delivery failure message too, please contact me for an update with your customer data to verify.

Since we have over 2,400 licenses now so we can’t deliver all licenses in a single day with 1,000 sending limit per day. We made some changes to delivery platform to slowly send software update to customers. I also noticed some customers have yet to provide fidelizer.key data after asking a few times so please contact me back.

Added Nimitra+Nikola feedback from Geoff

Here’s a new feedback today from Fidelizer Nimitra+Nikola customer in United Kingdom. He shared his impressions with his Linn Sondek turntable.


I have been using my Nimitra server and Nikola PSU for about a week now. Initial impression is that I not not appear to be missing anything with the sound.

The sound is similar to that which I get with my Linn Sondek turntable with good musicality and timing.

Out of interest, I run Fidelizer 7.9 software on my JPLAY Control PC which definitely improves clarity of playback in my system.

I listened to digital playback via my Nimitra server for about six hours last Saturday and no listener fatigue.

So this is the first time that I have actually enjoyed listening to CD and Hi-Res file playback with my system!

I would like to stay in touch with you for any future product or software developments you may have.


I’m glad to hear Nimitra+Nikola can deliver similar performance to Linn Sondek turntable without fatigue. 🙂

Added testimonial from JPS

Here’s another feedback today. He tested Fidelizer in his office first before buying Pro version for his main system.

Hi Keetakawee,

Fidelizer Pro works great for me. In the first place, I do not want to fiddle with computer settings and this product is easy to use. Tested it in my office (free version) and in my main system and the improvement in SQ was obvious in both. I even tested it with a coworker, (who is not an “audiophile”) and he was able to spot the difference in no time. Not easy to explain, but for him (and for me) music sounded less “confused” and better defined. I heard improved separation between instruments, a blacker background, and deeper bass rendition.

Kind regards,

It’s good to hear back from customer who also tested Fidelizer with non-audiophile from time to time. 🙂

Added testimonial from NWCgrad

Here’s a new feedback today. This time I found his feedback in Computer Audiophile’s community.

Listened to the Pro version of the software over the weekend. For right around $350 my DIY music player sounds unbelievably good. Thanks for the software that provides the finishing touch.

I’m happy to know Fidelizer can help DIY server sounding unbelievably good. Happy listening. 🙂

Fiio X5iii Purist ROM version 1.1.8 released with PerfectDynamics Sound Optimizations!


Fidelizer - PerfectDynamics Sound Optimizations


For new users, please read about PerfectDynamics Sound Optimizations first for new improvements with Fidelizer ROMs.


Before introducing PerfectDynamics update, I tested PerfectDynamics Sound Optimizations with iBasso DX200, Fiio X5iii and iBasso DX90 to confirm my theory. However, launching new ROM updates requires more testing and I found some issues to work on since last week.

When I left X5iii playing with repeat, I found it stopped playing after few tracks. I also added other optimizations for Fiio itself too so finding which tweaks caused this issue took me a lot longer than I expected and now it’s finally fixed and stable for whole night music.

-Based on firmware version 1.1.8
-Apollo – Fidelity Edition from included
-build.prop tweaks for better video and storage performance and improve battery life
-bundled audio effects removed but keep main engine (Poweramp works now)

Download: Fiio X5iii Purist ROM


For Fidelizer Enhanced / Advanced ROM users, you’ll also receive the following improvements with new update as below:

-Added PerfectDynamics Sound Optimizations for more accurate sound reproduction
-Added second micro SD card slot support (experimental)
-Disabled Kernel Same-page Merging feature
-Fixed playback instability with high capacity micro SD cards
-Optimized I/O priority for better stability


Installation Guide

1. Download Factory Tool provided by Devin
2. Turn off Fiio X5iii
3. Connect X5iii with USB connection to computer while holding previous track button
4. Install RK USB driver included in Firmware Upgrade Tool and replace update.img image with mine.
5. Open X5III Firmware Upgrade Tool.exe and flash ROM according to instructions provided in Instructions of How to Use the X5 3rd gen Firwmare Upgrade Tool.pdf


There’s a lot of improvements for Advanced ROM and I also added Enhanced ROM into collection too. Please read Portable Products for more details including Fiio X5iii Fidelizer Mod project with 3 modification levels. Happy listening. 🙂

Added Nimitra+Nikola feedback from Daniel Gale

Here’s another feedback today from Fidelizer Nimitra+Nikola customer in USA. He also purchased my custom USB and power cables too.

Spent last night immersing myself in Roon. Sounds wonderful and is so intuitive to use. Thank you so much for your incredible service. Amazing how you can service customers half-way around the world instantaneously. I am very impressed with your product and service.

I’m happy to provide prompt services for Nimitra computer audio server around the world for best experience. 🙂