Fidelizer optimizes Windows' audio output

Martin Brinkmann
Apr 4, 2013
Updated • Feb 5, 2018
Music and Video, Windows software

Fidelizer is a program for Microsoft Windows devices that improves the sound quality of audio programs that you run on the Windows machine.

If you like to play audio or video files on your system and notice disruptions, background noise or other things that reduce your enjoyment while listening to music or watching movies, you may have tried to remedy the situation in the past.

Maybe you are only noticing issues with audio playback when you are running other programs on your system at the same time, or maybe the issues occur when you are downloading with full speed to your system.


windows audio optimization

Fidelizer has been designed to optimize the audio output on Windows operating systems. Lets take a look at how the program does that. The program ships with three optimization levels that modify settings of the system temporarily. More precisely, the optimizations last until you exit the program or shut down the system.

The professional optimization level makes the least number of changes to the system. It runs Fidelizer's core system and resource scheduler optimizations on the system. It is not really clear what these optimizations do in detail though, only that they are the least taxing to the system.

The audiophile optimization level adds to that processor core resource assignments for multi-core optimizations and advanced system and network process resource priority optimizations. It lowers many processes to the lowest priority and lower system and network performance to provide audio with priority access to resources.  According to the author, audio will be working on all cores except the last one, while the audio player and the majority of processes will run on the last core.

The extremist optimization level finally stops many services that are not needed to operate the system or audio related.

Update: Fidelizer Plus and Pro upgrades are available now. Fidelizer Plus  supports audio profiles, a feature called Core Isolation to improve clarity and transparency, runs better on Windows 10 and Server 2016, and does not open the Fidelizer website after optimizations.

The Pro version of the program supports all Plus edition features and supports more audio solutions, works on headless machines and other improvements.

Closing Words

You are probably wondering if this is snake's oil or if it will have an effect on the quality and performance of audio on a PC system.  It is hard to tell, especially since I never experience issues playing audio on my system, and that I would not consider myself an audiophile. I can see this work really well on systems that are not the newest, or on systems that are often taxed to the maximum. Users who experience audio related playback issues may want to give this a try. Since all changes are temporary in nature, there is not really anything that can break while using the program.

Make sure you uncheck the "set to homepage" check box in the program interface before you start to optimize your system's audio output.

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  1. anon said on April 4, 2013 at 12:16 pm

    for most user who use their onboard soundcard and satisfied with ibud or god forbid, beats, they won’t hear a damn thing difference with this.

    1. Anon said on April 5, 2013 at 9:19 am

      The remaining users will pretend to hear a difference.
      Maybe “pretend” isn’t the right word, since they actually believe they are hearing it.

      Much like some cult leaders start to believe their own bullshit.

      1. anon said on April 6, 2013 at 11:23 am

        It’s okay to hang on to your cheap ass shit and pretend that all those expensive equipments are all nothing more than snake oils (though some of them are), I hope you never have the chance to audition any of those since your whole world may turn upside down.

        Or maybe not, hang on to your fart canon on your ears.

      2. Anonymous said on October 23, 2019 at 7:28 pm

        what is it with the arrogance within the “audiophile” community?

  2. Coyote said on April 4, 2013 at 11:53 am

    I could see this type of app for gaming or even HD video. But really if your PC can’t play basic audio without cracking or skipping… maybe you should get one from this century. :P

    Also this seems like it would make your system more unstable and likely to crash, causing more issues than just poor audio. Plus digital audio is digital… there is no “quality” outside what bitrate you have the songs encoded and the speakers you use to listen to it. The digital medium to convert to analog is the same on all systems/cd players/ipods. It’s almost like Monster Cable wrote their own software app.

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