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Fidelizer 9.0 released – Massive quality of life improvements with reworked optimizations for Windows 11 25H2 and beyond

It’s been over 2 years since the last release of Fidelizer version 8.11 to public. At first I was planning to release version 8.12 to address some remaining issues but disappearance of WMIC before finalizing Erawan Flagship Streamer made me realized a change is needed.

So, I tried to work on 8.12 update with changing requirements from WMIC before moving forward to version 9 milestone but Fidelizer heavily relies on WMIC features for most of core optimizations. It turned out I need to rewrite the whole software package to resolve this.

I decided to focus into developing Fidelizer 9 from scratch and have these issues resolved. I took spare time to develop Fidelizer 9 bits by bits since past year. There’s a lot of new cool features, improved user experience, and more potentials to explore as below:

 

Fidelizer Intelligent software detection

 

Fidelizer Upgrade Program

 

Browsing for media player application to choose is one of biggest pain point I noticed based on user’s feedback. Some don’t know where to look for executable file or can’t access restricted area like WindowsApps section manually.

I spent most of development time in past year designing how I should resolve this issue and developed software detection algorithm. This will detect supported software from installation record and verify the software location and put on selection box.

At first it was quite a struggle because different apps having different installation records and detection methods. RAATServer.exe file exists in Roon/RoonBridge/RoonServer returning multiple results. How should I detect the right one reliably?

After a successful implementation, it’s very easy to choose media player application for end user now. You can choose Audirvana/foobar2000/HQPlayer/JRiver/Media Player/Roon in version 9.0 and I will add more in future updates. Stay tuned.

 

Native Universal Windows Platform (UWP) support

Fidelizer 8.7 added Audirvana support to allow selection of Audirvana.exe file to be executed. It was a make shift solution that can work with Audirvana and some UWP apps with the same structure. I didn’t have time to implement this properly due to high complexity with so little time.

I spent my free time in developing native universal Windows platform support for a few months last year and finally got a working prototype with tested UWP apps that didn’t work before. I can’t say for sure it’s 100% working but tested applications like Media Player is working now.

With native universal Windows platform support, I can add more UWP version media player applications in future so feel free to request your favorite media player applications and I’ll see how I can integrate them into Fidelizer’s intelligent software detection.

 

Reworked core isolation policy in media player application

 

Fidelizer - Media Player Application

 

Core isolation policy used to be picked based on advanced configuration option for all three apps automatically. This can some complications and limit options to apply core isolation policy or not. I took this into heart and redesigned core isolation policy to work separately.

In this reworked version, you can pick 6 different core isolation policy options which are:

Default: This won’t apply change to process priority for self managed application
All cores: This will enforce selected application to run with all available processor cores
Endpoint: This will make application focus on audio cores similar to Transparency policy
Performance: This will make application focus on most cores similar to Performance policy
Transparency: This will make application focus on avoiding main audio/non-audio cores for optimal isolation
Idle: This will put application on lowest possible non-audio cores to reduce interference to audio playback the most

With free selection, you can integrated supporting audio application to work with main application and diverse optimizations. You can also put non-audio application to work with minimum interference. You can compare between Endpoint/Performance/Transparency and pick the most suitable one too.

Also, media player application’s priority and affinity is now handled after execution with wait time so this can apply to all instances with the same name and improve effectiveness to cases like JRiver running as Media Server or RoonServer on startup too.

You can apply 3 different Priority and Core isolation policy to three different apps like HQPlayer + RoonServer + RAATServer optimizations. For self managed software like HQPlayer, I recommend setting all options to Default.

 

Improved non-audio process tuning with efficient core support

At first I was going to address this since some clients prefer the older approach to manage non-audio processes for better sound quality. Since I decided to move forward to version 9.0, it’s important to address the situation of this case again.

In version 8.11, non-audio processes beyond the last 1-2 cores to half of total cores excluding physical cores and put physical cores on media apps. This caused strange sound signature in some systems.

In version 9.0, core isolation policy is handled separately and user can choose suitable options without worrying about isolation issues with non-audio processes. Using “Enforce non-audio process to use only one core” option will also work too.

 

Reworked core optimizations based on Windows 10/11

 

Fidelizer - Optimization Wizard

 

When Fidelizer 8.0 was released on 25th December 2017, Windows 10 was still fresh and optimizations are reworked based on past 10 years experience. Things have changed a lot during past 10 years, and also personal journey of developer too.

Fidelizer’s concept of real sound has been evolving to reach its maturity with 3 main principles as below:

Precision: Reproduce digital audio faithfully according to principles of engineering and physics based on product’s design.
Emotion: Bring the record to life and feel the real sound of the recording in your listening room.
Relaxation: Find the right balance between performance and musicality that makes you want to keep listening for timeless session.

It’s no longer about chasing the extreme fidelity that focus on a single dimension of quality after 20 years of audiophile journey. Fidelizer 9 will focus on finding the balance of these three principles and deliver the what feels “Real” in all aspects, not just one.

So, all audio profiles have been reworked from scratch including “General Purpose” in Free version. Plus and Pro version also have additional core optimizations in API level to further improve audio performance in more aspects.

 

Improved Fidelizer Pro’s system configuration based on CoreStreamOS development

One of Fidelizer Pro’s biggest point is the ability to apply changes on system configuration permanently. Once this limiter is lifted off, Fidelizer Pro is going all out. Behind that one line of option lies a lot of deep technology as a core feature.

While developing version 9, CoreStream was launched and prototype of version 9 development was put into good use of CoreStream. At that time there wasn’t full scale of software package like NimitraOS and ErawanOS so this is a showcase to test in big projects.

After successful audio shows with CoreStream that can perform very well as both Roon core and uPNP endpoint in multiple rooms, it was certain Fidelizer 9 will bring next level of real sound to make music feels more organic and lifelike.

You could say Fidelizer 9 has inherited the foundation from CoreStreamOS that shares similarity in sonic performance with NimitraOS and ErawanOS at the same time too. If you’re not ready to try CoreStream / Nimitra / Erawan yet, Fidelizer Pro 9 is the closest thing to them.

 

Pricing

Fidelizer 9.0 is a major version upgrade after 9 years from Fidelizer 8.0 release, 12 years since Fidelizer 6.0 first release with Fidelizer Upgrade Program. The price never get changed after 12 years and 9.0 has a lot of hard work into it.

Since version 9.0, Fidelizer Plus / Pro version will have price adjustment as below:

Fidelizer Plus Full License: $39.95 -> $49.95 USD
Fidelizer Pro Full License: $69.95 -> 89.95 USD
Fidelizer From Plus to Pro: $30 -> $40 USD
Fidelizer From Older Plus to Pro: $39.95 -> $49.95 USD
Refund discount for returning customers: $5-10 USD -> $10-20 USD

Fidelizer 9 Upgrade price still remains the same so you can upgrade from Fidelizer 6-8 licenses to version 9.0 at the same price $19.95 – 29.95 USD as before. This won’t affect existing customers. Additional licenses will receive extra discount too.

Existing customers can purchase “Fidelizer 9 Upgrade” option in Fidelizer Upgrade Program page to receive Fidelizer 9.0 updates of purchased licenses and feel free to contact author to ask about instructions of Fidelizer 9.0 upgrade.

 

 

Changelog for version 9.0

Free
-Advanced configuration options except OS Timer are disabled for safety purposes
-Changed OS Timer recommendation info with default set to 1.0ms (Can still change to 0.5ms manually)
-Process affinity tuning of media player application can be used outside core isolation policy
-Optimized core optimizations based on current testing with Windows 10/11 for general purposes
-Added Media Player Application selection list to choose detected Music apps starting with Audirvana/foobar2000/HQPlayer/JRiver/Media Player/Roon
-Added Default option in Priority and Core Isolation Policy options to not tinker Media Player Application’s priority or core affinity
-Changed Apply Core Isolation Policy option to use selectable options with All cores/Endpoint/Performance/Transparency/Idle
-Changed media player application tuning to apply tuning after startup instead launching with custom priority/affinity
-Improved compatibility with Windows 10/11 to use PowerShell when WMIC is not present
-Improved compatibility with Windows Store apps to support more applications with Fidelizer
-Improved core affinity optimizations to support more than 16 processor cores
-Improved core isolation policy optimizations to support modern processors with efficient cores better
-Improved graphics and user interface for better ease of use
-Improved process optimizations to perform faster and improve optimization time on lower user levels
-Improved memory detection algorithm to apply more optimal optimizations based on available physical memory
-Improved reliability of process priority tuning during core optimizations

Plus
-Added all audio profiles from Fidelizer Pro license to maximize non-permanent solution
-Added Media Player Application selection list to choose detected Music apps starting with Audirvana/foobar2000/HQPlayer/JRiver/Media Player/Roon
-Added Default option in Priority and Core Isolation Policy options to not tinker Media Player Application’s priority or core affinity
-Added DWM (Desktop Window Manager) to be handled in API level optimizations
-Changed Apply Core Isolation Policy option to use selectable options with All cores/Endpoint/Performance/Transparency/Idle
-Changed default audio profile to “Network Renderer”
-Changed media player application tuning to apply tuning after startup instead launching with custom priority/affinity
-Improved compatibility with Windows 10/11 to use PowerShell when WMIC is not present
-Improved compatibility with Windows Store apps to support more applications with Fidelizer
-Improved core affinity optimizations to support more than 16 processor cores
-Improved core isolation policy optimizations to support modern processors with efficient cores better
-Improved core optimizations to be more effective on Windows 10/11
-Improved graphics and user interface for better ease of use
-Improved process optimizations to perform faster and improve optimization time on lower user levels
-Improved memory detection algorithm to apply more optimal optimizations based on available physical memory
-Improved reliability of process priority tuning during core optimizations
-Updated all audio profile options with reworked optimizations based on Windows 10/11 standards

Pro
-Added Media Player Application selection list to choose detected Music apps starting with Audirvana/foobar2000/HQPlayer/JRiver/Media Player/Roon
-Added Default option in Priority and Core Isolation Policy options to not tinker Media Player Application’s priority or core affinity
-Added DWM (Desktop Window Manager) to be handled in API level optimizations
-Changed Apply Core Isolation Policy option to use selectable options with All cores/Endpoint/Performance/Transparency/Idle
-Changed default audio profile to “Network Renderer”
-Changed media player application tuning to apply tuning after startup instead launching with custom priority/affinity
-Changed OS Timer recommendation info with default set to 1.0ms (Can still change to 0.5ms manually)
-Improved compatibility with Windows 10/11 to use PowerShell when WMIC is not present
-Improved compatibility with Windows Store apps to support more applications with Fidelizer
-Improved core affinity optimizations to support more than 16 processor cores
-Improved core isolation policy optimizations to support modern processors with efficient cores better
-Improved core optimizations to be more effective on Windows 10/11
-Improved graphics and user interface for better ease of use
-Improved process optimizations to perform faster and improve optimization time on lower user levels
-Improved memory detection algorithm to apply more optimal optimizations based on available physical memory
-Improved reliability of process priority tuning during core optimizations
-Updated all audio profile options with reworked optimizations based on Windows 10/11 standards
-Updated system configuration optimizations based on CoreStreamOS tuning

 

Download: Fidelizer 9.0
Upgrade: Fidelizer Upgrade Program

 

You can download latest version of purchased Fidelizer software from the same download link that we sent in email before. If you are not sure where to download purchased Fidelizer software, feel free to contact us and request software download link.

Introducing StreamPoint, the world’s first Wi-Fi solution engineered to complete your streaming experience

 

StreamPoint - Main

 

After finishing AirStream2 development, many clients are satisfied with how AirStream2 can help streaming reaching highend audio level enough to enjoy together with flagship CD player side by side. However, there’s still something amiss making streaming few steps behind CD.

We work on many projects after completion of Erawan flagship streamer such as Lira Network Station which is our best design product to put network switch and power supply together as an upgrade not compromise, Fidelizer cables designing Erawan flagship cables for USB and ethernet connection.

Today, we’d like to introduce StreamPoint as the missing link to complete your streaming experience. This product helped us feel like streaming can finally surpass CD for the first time with our clients after years of development.

 

StreamPoint - Application 1

 

Streaming is improving a lot from last 10 years with hires streaming platform, streamer, power supply, and network switch. However, most people still use mobile phone with standard Wi-Fi with low precision clock and noisy environment feeding network switch.

You can plug ethernet cable from network switch or router to StreamPoint and enjoy audiophile access point engineered with design to minimize jitter and latency to provide the best Wi-Fi solution to audiophiles as below:

-10/100Mbps fast ethernet connection to create 2.4GHz network with lowest possible noise and jitter in network
-Audiophile build quality with aluminum chassis protecting circuit from RFI with great reliability
-Barebone access point firmware stripping DHCP, Firewall, IPv6, Logging, WAN, etc. down to most basic forms.
-Circuit design with high precision clock and improved power regulation and RF filtering network
-Intensive research on router configuration and firmware optimizations with years of experience from Purist ROM projects
-USB port power design to use power directly from high quality streaming device for maximum cost efficiency

With major breakthroughs to advance network quality on Wi-Fi with StreamPoint, we can proudly say StreamPoint is a successor of AirStream and StreamHub so they become discontinued. We’ll move forward with designing and building our own solutions from ground up in future.

 

StreamPoint - Application 2

 

StreamPoint can also work as Client mode to bridge connection from StreamPoint access point to streaming device unit like infamous TP-Link’s client mode among audio communities. They work together with true bridge design without NAT so performance and reliability is even better.

And very good news is you can use two StreamPoint AP + Client units together as true plug and play solution. No configuration required at all. Just plug StreamPoint AP to network switch/router and StreamPoint Client to streaming device. That make Wi-Fi isolation so easy for audiophiles.

 

StreamPoint - Client

 

The product price will be $429 USD with 30-day money back guaranteed and free shipping until 30th June 2026. You can read more about StreamPoint Access Point product in details before ordering and happy listening. 🙂

Introducing Fidelizer Cables section featuring USB and Ethernet cables for streamers

 

Cables - Main

 

After completing Erawan flagship streamer product, the mission has become clear to me that Fidelizer won’t be able to deliver real sound experience without getting digital done right if most cables in market don’t follow industrial standards properly.

Digital isn’t just about coloration like analogue cables. Jitter is the most important aspect in time domain so designing digital cables that don’t follow industrial standards will cause unexpected issues related to jitter.

To address this issue and make sure Fidelizer streamers such as Erawan, Nimitra, and CoreStream will deliver real sound experience as envisioned, I decided to open Fidelizer cables section to distribute digital cables for these products as below.

 

CoreStream USB / CAT8 Cable

 

CoreStream - USB / CAT8 Cable

 

After successful launch of CoreStream streamer that can provide highend audio performance with Audirvana / JPLAY / Roon software for many customers worldwide, some people asked for suitable USB and ethernet cables for CoreStream too. So we designed cables with optimal sonic performance for CoreStream as below.

This is actually the first design as cables for Nimitra streamer before launching CoreStream. Since we found the most suitable design for Nimitra later, it’d be a shame to drop this cost effective design so we revised the design for CoreStream instead.

 

Conductors: 8 x 24AWG solid core pure copper
Finishing: Foil + Tinned copper with premium grade sleeving
Connector: Premium grade connectors
Standard length: 5ft (1.5m)

 

The MSRP price for CoreStream cable at standard length 5ft is US $169 with 30-day money back guarantee and one year product’s warranty. These cables are the best in its price point to use with Fidelizer CoreStream streamer.

 

Nimitra USB / CAT8.1 Cable

 

Nimitra - USB / CAT8.1 Cable

 

Nimitra streamer is our first and most accomplished product getting a lot of awards from professional media worldwide including Stereophile. We designed Nimitra cables with the similar principle as affordable yet can deliver performance as flagship quality level product.

We tested Nimitra cables with many flagship quality cables in our clients’ systems and make sure that Nimitra with these cables can deliver streaming experience that can scale wonderfully for our clients worldwide who use ultra highend systems too.

Conductors: 8 x 24AWG solid core pure copper
Finishing: 100% coverage Foil + Tinned copper with noise reduction high-end grade sleeving
Connector: High-end grade connectors
Standard length: 5ft (1.5m)
The MSRP price for Nimitra cable at standard length 5ft is US $499 with 30-day money back guarantee and one year product’s warranty. These cables are the best in its price point to use with Fidelizer Nimitra streamer.

 

Erawan USB / Fast Ethernet Cable

 

Erawan - USB / Fast Ethernet Cable

 

Erawan flagship streamer is our main reason why we decided to make cable products. At first, we intended to make only one cable design that can be used on both Nimitra and Erawan. However, there was one cost no objective design in our minds for almost 10 years too.

We considered it for a very long time and decided to believe in our gut feeling to build it. This has triple layer of finishing optimized to deliver the most transparent sound revealing every micro-detail. Ethernet cable is designed for 100mbps speed only for lowest noise floor.

Conductors: 4 x 22AWG solid core pure copper
Finishing: 100% coverage Foil + Tinned copper with teflon insulation and triple layer finishing (Carbon / FEP / PFA)
Connector: High-end grade connectors
Standard length: 5ft (1.5m)
The MSRP price for Erawan cable at standard length 5ft is US $1899 with 30-day money back guarantee and one year product’s warranty. These cables are the best with cost no objective design to use with Fidelizer Erawan flagship streamer.

 

Fidelizer USB / Ethernet cables follow industrial standards having matching impedance of cable and use professional connectors with years of research and testing to make sure they’re robust, secure, and deliver best experience and value.

You can order Fidelizer cable starting from $169 USD with 30-day money back guaranteed and free shipping until 30st April 2026. You can read more information about Fidelizer Cables in details before ordering and happy listening.

Added testimonial from Tom Pinckard

Here’s another feedback today. He shared his feedback after upgrading Fidelizer Pro license to version 9.0 as below.

Thanks so much! Loving the sound!!

I’m happy to hear he’s loving the sound of Fidelizer 9.0 upgrade and happy listening. 🙂

Added testimonial from Giuseppe Macaluso

Here’s a new feedback today. He shared his feedback after upgrading Fidelizer Pro license to version 9.0 as below.

Thank you. Congratulations, excellent update. Exceptional transparency. Greater silence. Regards.

And this is the original message in Italian.

Grazie. Complimenti ottimo aggiornamento. Trasparenza eccezionale . Maggiore silenzio. Saluti

I’m happy to hear that Fidelizer 9.0 is bringing an excellent update with exceptional performance in his system and happy listening. 🙂

Fidelizer Erawan flagship streamer debut in Taiwan’s 2026 TAA International HI-END Audio Show

 

 

Yesterday we helped setting up Fidelizer Erawan flagship streamer with ReSound Audio in audio show. This show will feature the upcoming new firmware update including new optimizations for Audirvana / Roon core.

You can read details about the show below happy listening to audiophiles in Taiwan. 🙂

 

【展覽資訊】
2026 TAA 國際 HI-END 音響大展
日期|2026年 8 月 6 日(四)~ 8 月 9 日(日)
時間|8/6(四)至8/8(六)10:00 – 18:00;8/9(日)10:00 – 17:00
地點|台北君悅酒店 Grand Hyatt Taipei(台北市信義區松壽路2號)

 

【Exhibition Information】
2026 TAA International HI-END Audio Show
Date|August 6 (Thu) – August 9 (Sun), 2026
Time|8/6 (Thu) to 8/8 (Sat) 10:00 – 18:00; 8/9 (Sun) 10:00 – 17:00
Venue|Grand Hyatt Taipei (No. 2, Songshou Road, Xinyi District, Taipei City)

 

Added testimonial from Rene

Here’s a new feedback today. He shared his feedback after receiving Fidelizer Pro license as below.

Dear Keetakawee,

It is a big step from Fidelizer to Fidelizer pro in respect to the enhanced audio quality! I use this one exclusively with a acer notebook, a Mojo2 and the Sennheiser HD800S. It is a pleasure to notice the finer reverb resolution, more details and the impression of just more music and less hifi. Real great work what You have done, thanks a lot!

Kind regards,
Rene

I’m happy to hear that Fidelizer Pro is bringing more music and less hifi in his system and happy listening. 🙂