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News about Fidelizer products and services

Fidelizer Nimitra Firmware 7.0 Updater is released featuring Erawan and CoreStream support and major sound quality improvements

 

Nimitra Firmware 7.0 Updater

 

Nimitra Firmware 7.0 was scheduled to be launched with Nimitra3 / Nikola3 in August 2026 but there’s a lot of new optimizations to work on such as PerfectDynamics optimizations on Audirvana and Roon and Fidelizer 9 too.

Now that everything is finalized for completion, Nimitra firmware 7.0 is now ready. This upgrade is quite special due to Fidelizer 9’s engine with new core optimizations so both of new engine and firmware update will come together.

 

Fidelizer 9’s core optimization engine

 

With reworked optimizations of Fidelizer 9 release, Fidelizer streamers that will receive Fidelizer 9.0 core optimization engine together with firmware 7.0 update. This new engine will bring new life to Fidelizer streamers that could be considered as major upgrade.

This core optimization will greatly improve musicality and make Fidelizer streamers sounding more organic and lifelike in a way that can only be achieved through real analogue recording. But now streaming can feel that similar experience thanks to this new engine.

 

Tidal / Qobuz / Spotify Connect with exclusive playback support

 

Spotify Connect

 

As some people requested about Connect feature for Fidelizer streamers to work with native application directly, I developed solutions for Tidal / Qobuz / Spotify to work with connect feature also. At first they aren’t mentioned because most people stopped using it later.

But since there are a lot of customers who prefer to keep native user experience with Connect feature, I’d like to make this clear that Fidelizer streamers can implement Connect feature with exclusive playback support including Spotify also.

If you want to implement connect feature, please contact me and we can schedule remote session to implement this function on your streamer. Sound quality on Connect feature will perform great with Fidelizer 9’s core optimizations in dedicated environment.

 

Expanding support Erawan and CoreStream streamer

 

Since Nimitra streamer project has been scaling into Erawan and CoreStream, I planned about releasing Erawan 2.0 firmware after Nimitra 7.0 firmware later. But change on CoreStreamOS made me realized a single firmware for all streamers is better approach.

So, Nimitra firmware 7.0 will support Erawan flagship streamer and CoreStream streamer also. New changes and improvements will apply on all Fidelizer streamers in a way that is suitable for target streamer.

 

PerfectDynamics optimizations for Audirvana and Roon

 

Ever since Fidelizer has partnered with Audirvana, I’ve been working closely with Audirvana to provide the best experience to clients who use Fidelizer streamers with Audirvana software and assisted Audirvana on different occasions.

After Audirvana migrated platform to .NET 10 runtime, I have been working on making the most of .NET 10 runtime optimizations for and develop proprietary optimization technology for Fidelizer streamers with Audirvana.

After the completion of this new technology, Audirvana has become Fidelizer’s new reference platform that can provide PerfectDynamics using Kernel Streaming Extreme without harshness or fatigue and capture real sound performance perfectly.

Roon also migrated to .NET 10 runtime too so I expanded PerfectDynamics tuning to latest version of Roon platform too. Although current Roon doesn’t meet Fidelizer standards anymore, this update helped some clients moving from Roon 1.8 to current Roon now.

 

Improved uPNP streaming sound experience

 

Nimitra Firmware 7.0 Updater - Main

 

As Audirvana and Roon getting big improvement with PerfectDynamics sound optimizations based on new proprietary software tuning technology exclusively for Fidelizer streamers, uPNP streaming is also improved a lot too with deeper level tuning.

Pure playback optimization now disables more components reducing footprints further bringing quieter noise floor and core engine is further optimized to reduce interference in software to reduce non-audio workload.

Streaming latency is also enhanced with smooth transition for better playback experience. Stop / Pause playback will not stop music abruptly. Changing track can be adjusted between 0.5 / 1 / 2 / 4 second(s). Low latency options won’t have smooth track change.

 

Improved internal system and application optimizations

 

There’s a lot of internal system and application optimizations in firmware 7.0 to further improve audio performance in this release. Airplay now will have perfect a/v sync with Apple products like AppleTV and some application files are updated to more recent version.

Internal system optimizations are improved with improved reliability bring further stability across different playback platforms. With firmware 7.0, CoreStream / Nimitra / Erawan all can perform with the same reference real sound experience as best in its own class.

 

Changelog

-Added fade-out transition to perform with latency optimizations after “Low Latency” configuration
-Added PerfectDynamics runtime optimizations for Audirvana / Roon platform
-Added CoreStream and Erawan into supported devices
-Changed default audio profile to “Network Renderer”
-Changed process optimizations to maintain priority/affinity consistently
-Improved internal sound quality optimizations for based on Erawan to other product models
-Improved pure playback optimizations to disable more components
-Improved playback control experience with uPNP
-Improved streaming performance and reliability with uPNP
-Improved uPNP to stop after long pause so driver won’t keep locking on USB audio device
-Optimized Airplay a/v sync to have the exact sync accuracy
-Optimized output configuration to focus on 2.0 channel playback
-Optimized system optimizations to support different memory capacity across all product models
-Optimized uPNP platform to reduce background footprints
-Updated OpenHome libraries to latest stable version

 

This firmware update is based on current CoreStreamOS / NimitraOS / NimitraOS running on Windows 11 24H2 and can be installed on older models of Nimitra units to enhance current features installed.

If you’re using older Nimitra models, you may consider upgrading your current Nimitra model with Nimitra3 Streamer Upgrade Plan to get the best music experience, especially with Audirvana and Roon.

Erawan / Nimitra / CoreStream customers can request for firmware update and I’ll update Nimitra firmware through remote support. Feel free to contact through email or support channel to schedule remote session.

Added Nimitra feedback from Angelo

 

Nimitra3 - Side

 

Here’s a new feedback today. He shared his feedback of Fidelizer Nimitra streamer after upgrading upcoming Nimitra firmware 7.0 as below.

Ok, here goes. I waited to do 3 different listening sessions a day apart before I sent this, to make sure I was hearing what I was hearing.

frankly, I can’t even believe what I’m hearing. When you said “massive”, you were not exaggerating. This is bloody amazing. Let me try to put this into words, and I wanna remind you that I’m 65 years old, and worked in Hollywood for 30 years as a session musician, and sound engineer in music and film. I still do, but remotely from the east coast. And my audiophile uncle gave me a small tube system to start playing vinyl when I was 7 or 8.

If I didn’t know better, I would have immediately said this was not just an improvement over the prior Fidelizer versions; its like a complete re-write. Holy Toledo. The sound is even more relaxed than it was, its clearer, and more dynamic, without sounding pushy or hyped. More detail and instrument separation. Reverb trails apparent in places I didn’t notice them before.

I have reference tracks that I’ve been using with my systems for decades …rock, blues, jazz, classical, pop, you name it. Orchestras in pop and jazz are clearer, and more forward. I’m getting chills as I’m hearing this right now. Its like my whole system quality just went up another 50%!

The soundstage definitely got deeper. Not wider, and thats good, b/c I don’t need that. Instruments in the foreground came more forward but are still balanced and cohesive in the mix.

This is major, but you know that 🙂

I’m in awe of your expertise K. It amazes me when I come across these threads where people say Fidelizer doesn’t do anything, and you can’t measure it, etc. Really?? Because its not like its subtle!

Hope I didn’t bore you, I could go on, and I prolly will at another time after more listening, both myself and with friends who know my system very well.

I’m gonna say this one more time, and I’m not trying to be dramatic. I really don’t believe what I’m hearing. My system has sounded really good for some time, and I haven’t felt the need to upgrade anything, but its like someone snuck in the other night while I was asleep and replaced everything I have! It was you lol.

Thank you SO MUCH.

I’m happy to hear that he appreciates this Nimitra firmware upgrade as a complete rework and happy listening. 🙂

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.

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)

 

Introducing Fidelizer Nimitra3 streamer, Nikola3 linear power supply, and CoreStreamOS for CoreStream streamer

 

Nimitra3 - Front

 

After the completion of Erawan flagship streamer and Lira network station, I have been spending a great amount of time and effort into refining and improve NimitraOS based on Erawan which is my masterpiece together with Lira for over a year now.

The reason I have been working so hard was because I have a few clients who ordered Nimitra custom highend version and I have been working with them locally to reach the same height as Erawan. By the time I finished refining custom highend Nimitra version, it’s almost my 40th birthday.

With on going changes in market demand and Ai disruption that affected production cost of computer worldwide, I decided to launch Nimitra3 streamer and Nikola3 linear power supply upgrade with major changes in product lineup in this month that I’ll be forty years old.

 

Nimitra3 - Rear

 

Let’s start with Nimitra3 streamer first. After finishing Nimitra custom highend upgrade design, I implemented new changes into Nimitra3 with some hardware changes such as 8GB RAM to handle Audirvana / Roon smoothly. SSD has high precision clock upgrade too.

I also designed a new chassis for Nimitra3. It’s minor change but they are changes based on Erawan design to fit into Nimitra3. I printed back panel to show information better and change footer with gold finishing to match with Lira network station.

There’re a lot of internal changes and I don’t want to bloat this news with technical jargons so I’ll wrap up for Nimitra3 upgrade as below.

 

-NimitraOS is upgraded to Windows 11 24H2 based on ErawanOS design
-BIOS is optimized and tuned with recent optimizations for optimal performance and sound quality
-RAM is upgraded to 8GB with customized and tested model for approved sonic performance
-SSD is upgraded with high precision clock similar to how Erawan has SSD with upgraded clock

 

Long story short, Nimitra3 is reborn with Erawan as reference. Getting Nimitra3 + Lira together will save half of investment from Erawan for the most cost effective upgrade experience. Some people upgraded to Nimitra3 before official and they all are loving it.

 

Nikola3

 

Now let’s move on to the next upgrade Nikola3 linear power supply. Nikola3 is based on Lira network station design without network part so they share the same internal parts and circuit design including gold plated XLR termination outputs.

Nikola3 will come 2 outputs and DC cables just like Aura medical grade power supply with the following upgrades below.

 

-Change output connector to gold plated XLR with very high voltage rating (same termination as HDPlex)
-Upgrade DC output cable with high quality pure copper wiring
-Upgrade diodes with Schottky design with years of listening tests with different models
-Upgrade internal wiring with high quality solid core pure copper wiring
-Upgrade output transformer with 100VA Toroidy audio grade transformer
-Upgrade stock fuse with improved dynamics and musicality

 

Lira network station is a perfect companion with Nimitra3 that can provide both network and power infrastructure but you can consider Nikola3 if you have preferred audiophile network switch. It’s also possible to upgrade from Nikola3 (12V) to Lira in future too.

 

CoreStream - Top

 

And here’s the most exciting news for CoreStream owners. CoreStreamOS is ready and this will enable all software features to make CoreStream working in the same way Nimitra and Erawan are operating. This will give a lot of depth into software optimizations.

CoreStream will come with premium streaming platform and receive unique optimizations such as runtime optimizations for Audirvana / Roon that will be introduced in future firmware updater release. I’m working on big platform upgrade with Audirvana now.

 

Anyway, there’s a big reason for CoreStream upgrade. As you may know already that the price of computer components have increased a lot due to Ai demand. The hardware cost of CoreStream got increased to the point that I should have launched CoreStream at $1299 USD.

But I feel bad to just increase the price because the market situation so I decided to turn CoreStream into full fledged streamer with CoreStreamOS and replace Nimitra Classic with CoreStream. Nikola Classic will also be discontinued (You can still order the last batch in this month).

The reason why I have to discontinue Nikola Classic is due to increased cost of parts and I can no longer stock multiple transformers with different voltages since I started importing transformers from Toroidy. Aura can deliver good results at very affordable price too.

I believe Nimitra3 and Nikola3 will deliver endgame streaming quality in your system for years to come after being reborn with Erawan and Lira as reference products. Here are the current price list of current streaming products launched today.

 

Nimitra3 streamer: $2,900 USD
Nikola3 linear power supply: $1,299 USD
CoreStream streamer: $999 USD

 

With increased hardware cost on increased RAM capacity and storage quality, I hope to deliver fairest approach to customers who purchased Nimitra before with flexible upgrade price based on market’s situation. I’ll list Nimitra3 upgrade at $100 USD first and pay the rest when done.

About $300 USD increased on CoreStream, I’d like to clarify that there’s $100 USD worth of software license and over $100 USD for parts cost increased. I didn’t take profit for myself and cover the cost for retailers too. You can return the product within 30 days so no risk at all.

We are moving forward with a lot of changes in this year and I believe we are moving towards the right direction despite the challenges in current market situation. I’m preparing future product line up for years to come that will set new standards for audiophiles.