What we're building
A local-first music player for people who care how their music sounds. Your files, your devices — played back exactly as recorded, with every processing step visible and optional. No hidden resampling, no streaming lock-in, no guesswork.
Not a streaming front-end — Echobox plays the music you already own, by design.
What you get
Lossless and hi-res first — every other format too.
Your library
Your music, your files, your way. Echobox builds a rich, searchable library from the music you already own — with gapless playback, artwork, and support for every format that matters.
Listen anywhere
One app that reaches every speaker, DAC, and screen in your life. From Bluetooth headphones to network receivers, Echobox adapts to the output you're using.
Your sound
By default, Echobox changes nothing — bit-perfect, straight through. When you want to, shape playback to match your ears, your room, and your gear. Every tool here is optional and fully bypassable.
What makes it different
Every bit, exactly as recorded
Your music plays back exactly as it was recorded. No hidden processing, no unwanted conversions — just a clean path from file to speaker. This is the default — not a mode you turn on.
How it works
A custom audio engine built from the ground up for every device you own. The result is bit-perfect output, gapless playback, and automatic sample rate matching — your hardware gets exactly the signal it was designed for.
See everything. Guess nothing.
Most players are a black box. Echobox shows you exactly what's happening at every step — what's being processed, what's being changed, and what's passing through untouched.
How it works
A live view of your entire playback chain: what format you're playing, which processing stages are active, how your output device is configured, and whether your audio is passing through unaltered. If something changes your sound, you'll see it.
Know what you're actually listening to
Your collection tells a story beyond artist and album. Echobox analyzes every track so you can spot the best-sounding releases, compare masters, and understand what you're really hearing.
How it works
Every track gets analyzed: loudness levels, peak volume, dynamic range scoring, and clipping detection. Compare the 1987 CD master to the 2019 remaster. Spot low-quality files hiding in your collection. Your library has stories — Echobox helps you read them.
One app, every output you own
Headphones, speakers, Bluetooth, USB — Echobox remembers your preferences for each and automatically applies the right settings when you switch.
How it works
Speakers, headphones, Bluetooth, USB audio devices, Chromecast, and network players. Each output remembers its own sound profile — different EQ for your headphones than your speakers, different settings for wireless than wired. Set it once, forget it.
Optional tuning — only when you ask
Bit-perfect by default. When you choose to, fine-tune with EQ, headphone correction, and room correction — every stage independent and fully bypassable. Nothing touches your audio unless you turn it on.
How it works
Off by default. When enabled, seven independent stages — volume normalization, preamp gain, 20-band precision EQ, headphone spatial processing, volume control, 10-band graphic EQ, and a safety limiter. Load correction profiles for your room or headphones. Turn any stage on or off independently, or leave the whole chain bypassed for a pure signal path.
More than a music player
Echobox is built as a modular platform. Enable the features you want — audiobooks, recording, audiophile tools, speaker integrations — and disable what you don't.
How it works
The add-on system lets you tailor Echobox to the way you use it. Each add-on brings its own navigation, settings, and capabilities. Enable audiobook support when you need it. Turn on the audiophile toolkit for deep analysis and DSP control. Add SoundTouch speaker management or quick audio recording. Everything stays clean because you choose what's active.
Where and when
Prototyping
CompletePrototyping
CompleteThree dedicated layers — a realtime audio engine, a playback state machine, and a native UI — designed for glitch-free audio from day one.
Real file decoding with WAV and MP3. Stable realtime output through a purpose-built audio buffer.
The entire realtime audio path runs without memory allocation, contention, or logging. No compromises where it matters most.
Pause, resume, and seek to any position with sub-50ms accuracy. Instant response, no glitches.
Strict state transitions with invalid-state protection. Every edge case handled before it reaches the UI.
Pause/resume spam, random seeks, 60-minute endurance runs — validated before a single user hears it.
Core Engine
CompleteCore Engine
CompleteLocal music scanning, fast local database, playlists, and full metadata extraction.
Gapless playback, crossfade, 10-band EQ, ReplayGain, and a DSP processing chain.
24-bit/192kHz playback with automatic sample-rate switching. Bypass all DSP for pure signal integrity.
Lock screen controls, media notifications, and audio focus handling across Android and iOS.
Native audio backends on every platform — WASAPI exclusive mode on Windows, plus native macOS and Android audio — no wrappers, no compromises.
Underrun recovery, buffer monitoring, memory auditing, and a headless stress-test suite for CI.
Bypasses the Windows audio mixer entirely. Bit-perfect output straight to your hardware.
Direct integration with Linux audio subsystems. No wrappers, no extra latency — just raw hardware access.
Feature Expansion
CompleteFeature Expansion
CompleteFLAC, ALAC, AIFF, AAC, OGG, DSD, Opus — every major lossless and lossy codec.
Per-device audio profiles, adaptive output routing, multi-room sync, and room correction.
Browse your library, control playback, and see album art — all from the car dashboard.
A full visual diagram showing exactly what happens to your audio from file to speaker.
Compare album masterings, detect fake hi-res, flag clipping risk, and find your best-sounding releases.
Timeline-anchored sync across speakers with per-device latency learning and drift correction.
A modular feature system where each capability — audiobooks, recording, audiophile tools, speaker control — can be enabled or disabled independently.
A built-in calibration workflow: play a sweep, capture the response, and generate a room correction profile — no external tools required.
Android Release
In developmentAndroid Release
In developmentBit-perfect output to external USB DACs. Full support for high-resolution formats up to 32-bit/384kHz.
Seamless track transitions with zero gaps or clicks. Live albums and concept records play as intended.
Lightweight background service that keeps playing without draining your battery.
A dedicated audiobook experience with per-book resume, chapter navigation, and browsing by author and series.
Capture musical ideas from your microphone. Record, review, and manage audio snippets without leaving the app.
Stream thousands of radio stations with TuneIn integration and Radio-Browser search. Save presets for quick access.
One-to-many Bluetooth LE Audio broadcasts. Share what you're playing with anyone in range whose buds support Auracast — no pairing dance.
Spotify-style word-by-word lyric highlighting with character-level karaoke sweep. LRCLIB sourced; sidecar `.lrc` files written for portability.
Predict what your room needs before you buy a microphone. Five-step wizard from dimensions to four ranked treatment plans with native 3-D scene preview.
Type-aware fuzzy search across thousands of headphone profiles from oratory1990, crinacle, and the AutoEQ community. Profiles import directly into the parametric EQ.
Tested at 100,000 tracks. Resumable scans, foreground-service progress, deferred artwork extraction, parallel discovery — fast even on 5-year-old hardware.
iOS & Desktop
PlannediOS & Desktop
PlannedSync your library for offline playback. Your music goes where you go.
Full CarPlay integration for playback on the road. Will let you browse, queue, and control hands-free.
Built directly on Apple's native audio framework. Full performance with complete system integration.
Will run natively on M-series chips. Optimised for efficiency and speed.
Surface the live device name, route class, and shared/exclusive mix format on the Signal Path inspector. See exactly what's between Echobox and your hardware.
Professional-grade audio output through ASIO drivers for ultra-low latency.
A true native app — not a web page in disguise. Will use less memory and start faster than typical desktop music players.
Control playback from the terminal. Scriptable, pipeable, automation-friendly.
Deterministic CD-style artwork rendered locally for albums with no embedded or sidecar covers. Same album → same look across launches.
Your library, everywhere
PlannedYour library, everywhere
PlannedYour own library, available from anywhere — even terabytes of lossless. Files open on demand, no download step, no third-party service.
Start listening on one device and continue on another. Your full library, queue, and position will follow you.
Will let you generate shareable links to tracks, albums, or playlists. Recipients will be able to play directly in their browser — no account needed.
Will keep every version of a track as you refine it. Compare mixes, revert changes, and track your creative progress.
Will let you pin albums and playlists for offline playback. Smart sync will keep your favourites available without filling your storage.
Your music will be encrypted at rest and in transit. Only you will hold the keys to your library.
A shared cloud workspace for music studios. Will let you access multi-track sessions, stems, and masters from any workstation — no file transfers.
AI
FutureAI
FutureDescribe a mood, moment, or vibe and Echobox will build a playlist from your own library.
Discover forgotten gems in your own collection. AI will surface tracks you haven't played in months that match your current taste.
Will transcribe vocals in real time. Karaoke mode will highlight lyrics as the music plays.
Ask questions about your music collection in plain language. 'What's my longest album?' 'Show me everything recorded in the 1970s.'
Analog AI
FutureAnalog AI
FutureThe first AI model — will be trained from professionally licensed music recorded at 24-bit through a real ReVox A77 reel-to-reel.
Will expand the model library with additional reel-to-reel machines — each with its own sonic character.
Will let you use the analog AI models in your DAW. Will be available as a VST, AU, and AAX plugin for studios and producers.
Will let you apply tape and hardware models to any track directly inside Echobox. Preview in real time and save your settings.
AI models will be trained from the Pompye compressor/limiter — a boutique analog unit based on a late-1960s design.
Build with us
Early access, early influence. The beta list gets first builds and a direct line to shape what comes next.
One email per milestone. No noise.