Fidelia — Audiophile Player
macOS / Musique
Fidelia is the audiophile music player for Mac. It plays your music the way it was recorded — with no compression, no quality loss, and no compromise.
Now playing DSD natively. Completely rebuilt. Mastering-grade DSP built in.
Fidelia includes three DSP processors that engineers pay hundreds for as standalone plugins — built in at no extra cost.
HeadSpace — Frequency-Dependent Headphone Processing
Headphones are unnatural — your left ear never hears the right speaker the way it would in a room. HeadSpace corrects this with frequency-dependent crossfeed modeled on real head acoustics. A soundstage that sounds like speakers in a room, not two drivers against your ears.
Pro Dither — Psychoacoustic Noise Shaping
When audio is converted between bit depths, dithering determines whether the noise floor disappears or becomes audible. Fidelia uses a 9th-order psychoacoustic noise shaper tuned to ISO 226 equal-loudness contours — the same approach used by the dither processors licensed by Pro Tools and Logic. The noise floor drops below the threshold of hearing — mastering-grade, built in.
Reference Sample Rate Conversion
When your library's sample rate doesn't match your DAC, that conversion matters. Fidelia uses linear-phase resampling and minimum-phase engines, the same used by Reaper, Audacity, and professional mastering suites — both engines, with five quality presets and advanced controls.
Bit-Perfect & Exclusive Mode
In bit-perfect mode, source bits go directly to your DAC — no processing, no conversion. Exclusive mode locks the output device to Fidelia, bypassing the OS mixer entirely. Same behavior as dedicated audiophile hardware.
Native DSD Playback
Your DSD library plays directly — DSF and DFF, DSD64 through DSD512 — with no conversion and no orphaned files left behind. The one-bit stream is decoded in real time, so DSD plays gaplessly alongside the rest of your music. For a DAC that decodes DSD itself, switch on bit-perfect DSD over PCM (DoP) and the stream goes through untouched — enabled per device and confirmed with a built-in test tone, so it only ever engages where it works. No conversion step, no cleanup, no compromise.
3 Audio Unit Plugin Slots
Load any Audio Unit plugin on your Mac into one of three effect slots — EQ, reverb, compression, spatial processors, anything. Enable, disable, and open plugin GUIs without leaving Fidelia, and your plugins and their settings come back exactly as you left them, every launch.
Built for Large Libraries
Batch artwork lookup is built in. Select your untagged albums, choose Find Artwork Online, and Fidelia finds, downloads, and embeds artwork for the whole selection — or drag images onto the Now Playing panel to tag an album in one drop. For a large ripped library, that's hours of cleanup gone.
Everything Else
• Gapless playback rebuilt from the ground up — no gaps or clicks at track boundaries, even across changing sample rates and DSD
• Multi-channel output routing (up to 128 channels) for multi-output interfaces
• Format conversion to AIFF, WAV, FLAC, Apple Lossless, AAC, CAF
• Monkey's Audio (APE) import to Apple Lossless — lossless, at the source sample rate and bit depth, so your whole library lives in one place
• Music.app library sync
• Scalable player — 5 sizes plus a scale control up to 200%, the classic Fidelia 1 dimensions
• Fully customizable keyboard shortcuts
• Player-library window docking — the library snaps to the player and follows it
Supported Formats
Lossless: WAV, AIFF, FLAC, Apple Lossless (ALAC), CAF
DSD: DSF and DFF — native playback, DSD64 to DSD512 (bit-perfect DoP output to DoP-capable DACs)
Lossy: MP3, AAC, OGG Vorbis, Opus
Also supported: AC3, Sound Designer II, AU/SND, Wave64
Fidelia is free to try for 14 days — the full app, no limits. After that, a single one-time unlock. No subscription.
Fidelia Remote — the iOS companion app for Fidelia — is free on the App Store.
Quoi de neuf dans la dernière version ?
2.9.5 refines the album view. Drop a Finder folder onto the cover wall and it joins the playlist you have selected, not just the library — and you can now right-click any cover to remove that album from a playlist or delete it from your library, the same choices the track list offers. The cover wall is steadier, too.
2.9.4 brings native DSD. Your DSD albums — DSF and DFF alike — now play directly, with no conversion and nothing left behind in your library. The one-bit stream is decoded in real time, so DSD sits gaplessly alongside everything else. And for a DAC that decodes DSD itself, a new bit-perfect mode — DSD over PCM — sends the stream through untouched: switched on per device, and confirmed first with a quick test tone, so it only ever engages where it works.
2.9.3 keeps big libraries effortless. However large your collection grows, browsing the cover-art wall stays light on memory, and search keeps pace instantly — even across a hundred thousand tracks, results land the moment you pause and the window never stalls while it works. Upgrading from Fidelia 1 is gentler, too: a rare duplicate entry in an older library no longer halts the import partway. Rounded out with a little visual polish to the album view.
2.9.2 makes startup steadier. When an audio interface or a plug-in's cloud license isn't ready the moment you launch, restoring your effect chains and output device now waits gracefully and recovers as things come online — instead of settling for the wrong device or dropping a slot. Plus extra protection against unstable plug-ins.
2.9.1 makes working with Audio Unit plug-ins quicker and steadier. Opening an effect slot is now instant — your plug-ins appear at once while the system scans quietly in the background — and a slow or unresponsive plug-in no longer holds everything up: each is given a moment to respond, then set aside if it doesn't, so Fidelia stays responsive and steps around it the next time you reach for it.
2.9.0 adds an album art view. Switch the library between the song list and a cover-art wall, then open any album to a full page — the cover lifts into place, and the page is lit by a slow, breathing gradient drawn from the artwork, kept dark so it never glares.
The now-playing fidelity light shows at a glance how cleanly a track is reaching your ears; tap it for the full signal path, every stage from the source file through resampling, processing, and dither to your output device. Artist, genre, and composer become linked credits — tap one to refocus the library around it — and an album's Play button plays just that album. A now-playing panel keeps the cover, scrubber, and transport in the sidebar as you browse.
Recent 2.x updates brought accented-character library sorting, hardened AU host handling with automatic support for even more plugins, self-healing external volumes, expanded artwork extraction (FLAC PICTURE blocks, Ogg METADATA_BLOCK_PICTURE, more folder layouts), mouse-wheel scrubbing, drag/drop autoplay, Effect Presets, SRC controls, and Playlist sort columns.
Fidelia 2 is a complete rebuild. The app is rewritten in Swift on a new C++ audio engine with no legacy dependencies, while keeping the familiar interface intact. Fidelia Advanced features are now built into the core app.
The rebuilt DSP engine adds mastering-grade processing including psychoacoustic dither, frequency-dependent headphone crossfeed, and dual-engine reference sample rate conversion.
Fidelia 2 also adds batch artwork lookup, format conversion with dither, Music.app sync, native DSD playback, APE import to Apple Lossless without loss of dynamic range, expanded Fidelia Remote controls, and truly gapless playback.
