Fidelia — FLAC Music Player

Fidelia is a reference playback system for Mac: a complete, inspectable signal path from your files to your DAC, your headphones, or your whole multichannel rig. One purchase, no subscription.

ASK FOR YOUR MUSIC
Ask Claude, Codex or another AI app for "some Irish trad" or "the album I got yesterday", and Fidelia plays it from the music you own: your files, your Music library, your servers. It can play, queue and make playlists, never change your files, and it's off until you turn it on. Shortcuts actions work too.

FOUR MASTERING-GRADE PROCESSORS, BUILT IN
Equalizer — a ten-band EQ in Fidelia's own chain, with clip-safe automatic preamp and direct import of AutoEQ correction profiles for thousands of headphone models.

HeadSpace — crossfeed modeled on real head acoustics, so headphones sound like speakers in a room, not two drivers against your ears.

Pro Dither — moving between bit depths decides whether the noise floor vanishes or turns audible. A psychoacoustic noise shaper, the approach licensed into Pro Tools and Logic.

Reference SRC — mastering-grade sample-rate conversion with five quality presets.

THREE AUDIO UNIT SLOTS
Load any Audio Unit — EQ, convolution, room correction, spatial — up to sixteen channels wide. Plugin GUIs open inside Fidelia; every setting returns as you left it.

BIT-PERFECT & EXCLUSIVE MODE
Source bits go straight to your DAC — no processing, no conversion. Exclusive mode locks the device to Fidelia, like dedicated audiophile hardware.

YOUR WHOLE RIG, NOT JUST TWO CHANNELS
Fidelia plays 5.1, 7.1 and 7.1.4 — up to 9.1.6, sixteen channels — reading the layout each file declares, not guessing from track order.

The Output Dashboard puts the rig on one surface: your speakers drawn where they sit, your interface's outputs beside them, a live meter on each, so a miswired channel is obvious the moment music plays. Identify sweeps the room a speaker at a time; mute, solo and polarity sit on every speaker.

Give each speaker the distance you measured and the nearer ones are delayed to match; two subwoofers can differ. Your rig is remembered per output device.

NATIVE DSD
DSF and DFF, DSD64 through DSD512, decoded in real time, gaplessly, no conversion. For a DAC that decodes DSD itself, bit-perfect DoP sends the stream through untouched, enabled per device.

YOUR NETWORK, YOUR LIBRARY
Fidelia speaks Lyrion (Squeezebox): your server's library sits in the sidebar beside your Mac's files — one search, one wall, one player. Browsing it is free.

It plays TO your system, too. Any UPnP/DLNA streamer becomes an output — WiiM, Bluesound, Linn, Naim, Eversolo, Denon, HQPlayer — chosen from the same menu as your USB DAC, fed the original bytes, gapless.

Leave bit-perfect off and your whole chain runs first — HeadSpace, dither, resampler, your Audio Units — then streams the result.

BUILT FOR LARGE LIBRARIES
Album art fills itself in, exact matches only — a wrong cover is worse than a missing one. Every playlist remembers its own sort, and duplicates resolve to the best copy you own.

ALSO
• Internet radio — thousands of stations or any URL, quality graded
• Gapless — no gaps or clicks, even across sample rates and DSD
• Conversion to AIFF, WAV, FLAC, Apple Lossless, AAC, CAF
• Dynamic range, loudness and star ratings that other players wrote into your files, as sortable columns
• Monkey's Audio (APE) import, Music.app library sync
• Scalable player — 5 sizes plus a scale control to 200%

FORMATS
WAV, AIFF, FLAC, Apple Lossless, CAF, MP3, AAC, OGG Vorbis, Opus, AC3, Wave64, Sound Designer II, AU/SND, DSF, DFF.

PRICING — NO SUBSCRIPTION
Free to try for 14 days, the full app, no limits. Then a one-time unlock. Network playback — Lyrion libraries and UPnP streamers — is a separate one-time unlock; browsing your server is always free, so you see your library working before you decide.

Fidelia for iPhone, its own one-time purchase, brings your Mac's library over your own network. Fidelia Remote is free.