Fidelia — Audiophile Player

Fidelia is the audiophile music player for Mac. It plays your music the way it was recorded — no compression, no quality loss, no compromise. Your library, your order, nothing deciding what comes next but you.

YOUR NETWORK, YOUR LIBRARY
Fidelia speaks Lyrion (Logitech Media Server): the library on your server sits in the sidebar beside the files on your Mac — 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 bit-perfect original bytes, truly gapless.

And it doesn't make you choose between the network and your signal path. Leave bit-perfect off and the whole chain runs first — HeadSpace, the dither, the resampler, your Audio Unit slots — then streams the result. Most network players hand the file to the box and stop there.

One system, sounding its best. Multi-zone sync is deliberately not attempted — this is a player for the room you're in.

THREE MASTERING-GRADE PROCESSORS, BUILT IN
Engineers pay hundreds for these as plugins.

HeadSpace — headphones are unnatural: your left ear never hears the right speaker the way it would in a room. HeadSpace corrects that with frequency-dependent crossfeed modeled on real head acoustics. A soundstage like speakers in a room, not two drivers against your ears.

Pro Dither — when audio moves between bit depths, dithering decides whether the noise floor vanishes or turns audible. A 9th-order psychoacoustic noise shaper tuned to ISO 226 equal-loudness contours — the approach licensed into Pro Tools and Logic. The noise floor drops below hearing.

Reference Sample Rate Conversion — linear-phase and minimum-phase engines, the same found in professional mastering suites, with five quality presets.

BIT-PERFECT & EXCLUSIVE MODE
Source bits go straight to your DAC — no processing, no conversion. Exclusive mode locks the device to Fidelia, bypassing the OS mixer entirely. The same behavior as dedicated audiophile hardware.

NATIVE DSD
DSF and DFF, DSD64 through DSD512, decoded in real time, gaplessly, with no conversion. For a DAC that decodes DSD itself, bit-perfect DoP sends the stream through untouched — enabled per device and confirmed with a test tone, so it only engages where it works.

INTERNET RADIO
Thousands of stations, or add any by URL — living in your library next to the music you own, running the same reference engine. Fidelia grades each stream's real quality honestly: no lossy feed dressed up as hi-fi. HLS, Opus and Vorbis play natively.

THREE AUDIO UNIT SLOTS
Load any Audio Unit — EQ, reverb, compression, spatial. Open plugin GUIs without leaving Fidelia, and every setting returns exactly as you left it.

BUILT FOR LARGE LIBRARIES
Album art fills itself in — the covers on screen first, then the rest quietly in the background, exact matches only, because a wrong cover is worse than a missing one. Every playlist remembers its own sort. Duplicate recordings resolve to the best copy you own.

ALSO
• Gapless rebuilt from the ground up — no gaps or clicks, even across sample rates and DSD
• Multi-channel routing up to 128 channels
• Conversion to AIFF, WAV, FLAC, Apple Lossless, AAC, CAF
• Monkey's Audio (APE) import to Apple Lossless
• Music.app library sync
• Scalable player — 5 sizes plus a scale control to 200%

FORMATS
Lossless: WAV, AIFF, FLAC, Apple Lossless, CAF
DSD: DSF, DFF — native, DSD64 to DSD512, bit-perfect DoP
Lossy: MP3, AAC, OGG Vorbis, Opus
Also: AC3, Sound Designer II, AU/SND, Wave64

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

Fidelia Remote, the iOS companion, is free.