Fidelia — Audiophile Player

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.