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 streaming internet radio. Playing DSD natively. 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 moves between bit depths, dithering decides whether the noise floor vanishes or turns audible. Fidelia uses a 9th-order psychoacoustic noise shaper tuned to ISO 226 equal-loudness contours — the same approach licensed into Pro Tools and Logic. The noise floor drops below the threshold of hearing.
Reference Sample Rate Conversion
When your library's sample rate doesn't match your DAC, that conversion matters. Fidelia uses linear-phase and minimum-phase resampling engines — the same found in Reaper, Audacity, and professional mastering suites — 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 — decoded in real time, gaplessly, with no conversion and no orphaned files. For a DAC that decodes DSD itself, bit-perfect DSD over PCM (DoP) sends the stream through untouched — enabled per device and confirmed with a test tone, so it only engages where it works.
Internet Radio
Fidelia now streams. Browse a directory of thousands of stations, add any by URL, or import a playlist — it all lives in your library, next to the music you own. Every stream runs the same reference engine as your local files: your DAC, your HeadSpace, your signal path, untouched. And Fidelia grades each stream's real quality honestly — no lossy feed dressed up as hi-fi — so where a station broadcasts lossless, you hear every bit. HLS, Opus, and Vorbis stations play natively, and Fidelia Remote controls it all.
3 Audio Unit Plugin Slots
Load any Audio Unit plugin into one of three effect slots — EQ, reverb, compression, spatial, anything. Open plugin GUIs without leaving Fidelia, and every setting comes back exactly as you left it, every launch.
Built for Large Libraries
Batch artwork lookup is built in. Select your untagged albums, choose Find Artwork Online, and Fidelia downloads and embeds artwork for the whole selection — or drag an image 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, even across 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
Supported Formats
Lossless: WAV, AIFF, FLAC, Apple Lossless (ALAC), CAF
DSD: DSF and DFF — native playback, DSD64 to DSD512 (bit-perfect DoP output)
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 — is free on the App Store.
Quoi de neuf dans la dernière version ?
Fidelia turns the lights on.
Fidelia has always played your music beautifully. Now it shows it beautifully, too.
This release introduces Northlight: the album wall and sleeve views now draw their light from your own artwork. Every album casts its own color into the room — and while a record plays, its sleeve breathes quietly with the music. Nothing is decorated, nothing is tinted for effect; the color comes from your covers, honestly, the way everything in Fidelia comes from your music. No two libraries look alike, because no two collections are alike.
Radio grows up, too. Streamside puts your stations on a proper deck: sweep the dial by genre, and pin your favorites to nine numbered presets, car-radio style. Tune them from the keyboard with ⌃1 through ⌃9 (rebindable, like every Fidelia command) — and with Fidelia Remote 2.5, the same nine buttons ride in your pocket.
And Fidelia evens out your levels now, too. ReplayGain uses the loudness already written into your files to bring every song to the same comfortable level — or to balance a whole album while keeping its dynamics whole — so a hushed nocturne and a loud remaster no longer send your hand to the volume between tracks. It stays off until you ask for it; then choose Track or Album, set a pre-amp to taste, and it reads FLAC, MP3, ALAC, and AAC. Only the level changes — nothing in your music is touched.
Beneath the light, quieter work throughout: the library stays fluid through even the largest imports and syncs, and internet radio wears its buffering and loading status on the display where it belongs — never over the waveform. Audio Unit editor windows resize to fit the plugin, the format readout names the true codec rather than the file extension, station names and artwork land reliably on Mac and Remote alike, and the whole app runs a touch lighter. The window chrome is one seamless material from title bar to status bar.
Longtime Fidelia 1 owner? Fidelia 2 is an all-new app — a free download with a 14-day trial and a one-time unlock (no subscription), so a Fidelia 1 purchase won't restore into it. Email support@audiofile.engineering for your longtime-owner options (an upgrade offer, or your original Fidelia 1 to keep). Thank you for years of listening.
