Fidelia is a high-definition audio player for sophisticated music lovers. With support for all contemporary audio file formats and an elegant interface that focuses exclusively on music, it gives users the power and the freedom to organize, customize and savor their digital music collection at the highest possible fidelity in any circumstance. If you've invested in premium audio hardware, you should have the best audio software.

Just as an HD television enables viewers to enjoy high-definition video, Fidelia provides a gateway to high-definition audio by supporting a wide range of high-quality formats — including FLAC, which iTunes does not support. As artists in every genre increasingly turn to high-quality formats, Fidelia gives discerning listeners a way to hear their music as it was meant to be heard.

Fidelia's stylish interface reflects users' pure passion for music, paying tribute to the iconic stereo systems of decades past while offering sleek, intuitive controls that Mac owners demand. A classically styled volume dial is augmented by Mute and Dim functions. A crisp, eye-pleasing display shows individual track details, stereo levels and audio waveforms. Fidelia also provides seamless access to your existing iTunes music library.

With Fidelia, savvy music lovers have the ability to further personalize audio playback by installing third-party Audio Unit plug-ins. For example, Fidelia reaches beyond the narrow parameters of typical built-in equalization controls, allowing users to install higher-quality EQ and other Audio Units plug-ins to suit any taste or listening environment.

Audiofile's Fidelia Audio System optimizes the modern listening experience by realizing the full potential of quality audio hardware. No matter what type of sounds are in play, it incorporates Goodhertz's sample rate conversion, a new standard, to achieve optimum sonic fidelity. Dedicated audiophiles can also select real-time audio dithering via Goodhertz' Good Dither™ technology.

Fidelia features CanOpener™ Headphone Processing by Goodhertz, enabling you to create a more spacious, natural soundstage when listening with headphones. With user controls that are simple and effective, the algorithm can be fine tuned to your personal music library, listening preferences, and hardware.

CanOpener utilizes a unique, dynamic-range optimized equalization section to maintain the highest possible digital resolution at any setting. So you’ll never need to worry about digital clipping, distortion, or loss of headroom when using CanOpener. The CanOpener monitoring section offers several key monitoring facilities that are typically reserved for high-end monitor controllers or mastering consoles.

With the Fidelia app for iOS (sold separately), users can turn their iPhone, iPad or iPod touch into a full-featured remote control for Fidelia.

For additional info and product specs, visit the Audiofile website by clicking the button at the upper right.

NOTE: Fidelia does not support DRM-protected AAC files.

What's New

Version 1.6.5

Fidelia is now fully compatible with El Capitan (10.11)

Ratings and Reviews

2.8 out of 5
16 Ratings
16 Ratings
troiter ,

Sound quality is amazing, but...

I have audio engine a5+ speakers with the d1 dac. This app has the best quality sound than all other ones I’ve tried. There are a lot of things wrong with this application, though. 1) I cannot seem to get stable playback from mp3 files. I’m not sure if it’s variable bitrate or just mp3 overall, but *every* mp3 song skips at least once during play. FLAC doesn’t seem to be an issue. 2) The library window isn’t intuitive and somewhat clunky. The entire thing is on pause while importing a large library. Had to wait eons before being able to play a single song. Removing a song is also clunky. Ever hear of context menus? Once you select a song to delete from the edit menu, it says this action cannot be undone. I was initially afraid it was going to delete my file off the disk! I’ve opened up a support request (which I don’t even know if it got to them because I received no confirmation) about the mp3 issue. At th end of the day, the sound quality is worth the minor annoyances mentioned in this review, but not everyone is like me. :)

briab3000 ,

Your priorities will determine how much you like Fidelia

On the (significant) plus side, the sound quality is great. If you’ve been playing lossless or HD files through iTunes, Fidelia will shock you with how much better they can sound. Simply put, it’s not possible to hear the full potential of your high-quality music through iTunes.

On the downside, library management with Fidelio, even simply accessing the songs you’re looking for without a text seach, is just flat-out terrible. If you’re used to calling up a desired song quickly in iTunes, Fidelia will be an extreme disappointment. Don’t even think about browsing your music with Fidelia; it’s impossible. Essentially, the only way to use the app is to start with a specific song or album in mind, and then use text search to find it, open it, and enjoy the sound quality that Fidelia offers. Really, Fidelia’s file management is no better than just using the finder in OS X, which can be frustrating.

Also, the app can be VERY slow, especially if your library is a large one (which I’d guess it is for most folks who’d be interested in an app like this.)

Bottom line: if you’re willing to sacrifice all elements of convenience that iTunes has taught you are “normal,” Fidelia will deliver eye-popping sound quality. For me, that’s a fair trade-off, at least in certain situations. But I definitely find myself screaming in frustration at this app a lot.

ePubonOS/x ,

iTunes is “bit perfect”; you don’t need Fidellia.

As long as you play iTunes straight up, i.e. with no special effects including the equalizer and keep iTunes volume at 100% then iTunes is bit perfect. With STRAIGHT iTunes you must set the sample rate and the bit depth using Midi setup before you play a piece of music. Well supposedly anyway. I’ve changed the sample rate in mid song on iTunes and the DAC saw the correct sample rate.
All the third party music players that I have all claim sonic superiority. I cannot hear the differences and some 3rd party reviewers have also said this. Other users, as you see here, swear by them.
I have Fidellia and I use it when:
1. I am playing HD music and then I let it handle matching the sample rate.
2. I want to play a FLAC file. iTunes won’t play FLAC.

I tried using the Apple equalizer plug-in and it WAS AWFUL!! I don’t know if it this Apple’s fault or Fidellia’s fault but the equalizer sounds good in iTunes.

As others have said, the user interface is poor but I have Decibel, BitPerect, and Amarra and I don’t like them either.


Audiofile Engineering, LLC
7.1 MB
OS X 10.9 or later
Age Rating
Rated 4+
© 2011-17 Audiofile Engineering, LLC


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