Resonāda

A bit-perfect, high-fidelity music player for Android — built for people who hear the difference.

⬇️ Download the latest APK

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✨ What is Resonāda?

Resonāda is a no-compromise local + streaming music player for Android that treats your audio chain with the respect it deserves. It ships its own native audio engine — a user-space USB Audio driver that streams straight to your DAC, bit-for-bit, bypassing Android's mixer and the phone's audio HAL entirely. On top of that sits a full parametric DSP suite and a set of analysis tools most desktop software doesn't have: a live signal-path inspector, a real-time audio X-ray, reference-grade fidelity metering and a calibrated spectrogram.

Drop in your lossless library, plug in your DAC, and let the bits flow untouched — then see exactly what reaches your ears.

It's built for the listener who wants the truth about their music: is this file really hi-res, or an upscaled fake? Is the signal actually bit-perfect right now, or is something in the path touching it? Resonāda answers those questions, on-device, for every track.

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🌟 Features

🔊 True bit-perfect playback — bitXact

• Exclusive USB-DAC output. A hand-written USB Audio Class (UAC) driver streams isochronous audio directly to your DAC's endpoint via usbdevfs, bypassing AudioFlinger and the OEM HAL — the same "true bit-perfect" approach as the best desktop players. The DAC is reclocked to each track's exact sample rate (44.1 / 48 / 88.2 / 96 / 176.4 / 192 / 352.8 / 384 kHz), with no hidden resampling.
• Everything takes the native path — lossless (FLAC, ALAC, WAV, AIFF) and lossy (MP3, AAC/M4A, Ogg/Vorbis, Opus, WMA) all reach the DAC bit-exact when one is connected.
• Native DSD & DoP — .dsf / .dff up to your DAC's limits, as raw native DSD or DoP; software DSD→PCM decimation when no DAC is present.
• Bit-perfect at any volume — on DACs with a real hardware volume control, the app drives the DAC's own (often analog) volume while the digital stream stays untouched; when it must attenuate in software it uses TPDF dither instead of truncation.
• A badge that tells the truth. The bitXact indicator reflects the entire signal path — it only lights up gold when the audio is genuinely bit-exact, and stays dim the moment DSP, software volume or a sample-rate conversion touches the stream.

🔌 Deep USB-DAC insight

• Full UAC descriptor decode — product / manufacturer / VID / PID, UAC1 vs UAC2, interface and endpoint layout, every supported rate, bit depth and format, native-DSD capability, and whether the DAC exposes a usable hardware-volume feature unit.
• Live stream health — real-time clock drift (PPM), active-stream state, and the platform's own bit-perfect-mixer status alongside the app's exclusive path.

🎚️ Universe DSP

• Up to 32-band parametric EQ with true RBJ biquads and click-free coefficient ramping.
• Convolution (impulse-response) for headphone & room correction, plus crossfeed and compressor / limiter dynamics.
• AutoEQ, built in — import oratory1990 / Crinacle-style profiles, or search the headphone-correction catalogue in-app and apply with one tap.
• ReplayGain, and crossfade with selectable curves (linear / equal-power / exponential / logarithmic).
• A/B compare two settings instantly, a colourful response curve and a live real-time analyser (RTA).

🔬 Analysis & insight (the part no one else has)

• Signal Path inspector — a live, stage-by-stage view of what happens between the file and your ears: source → decoder → sample-rate converter → DSP chain → output, each annotated with the real format and state, plus a Signal Integrity score and the exact reason a track isn't bit-perfect.
• Audio X-Ray — real-time spectral + dynamics read-out of the actual PCM feeding your output: band energy, stereo width, dynamic range, compression, peak / true-peak / RMS, bandwidth and phase correlation — with a plain-language "why does this track sound bad?" diagnosis. Fully local; nothing is uploaded.
• Fidelity analysis & scoring — reference-grade, whole-track metering: DR dynamic range, True Peak (dBTP) with inter-sample overs, LUFS + LRA to EBU R128 / ITU-R BS.1770-4, clipping detection, effective bit depth, and fake-FLAC / lossy-upscale detection with a confidence level (Confirmed / Likely / Possible). Graded Poor → Reference.
• Calibrated spectrogram — per-channel FFT to the true Nyquist, a full-scale tone reads exactly 0 dB, with the fidelity verdict and detected frequency cutoff drawn right on the image, tap-any-point read-out, a dB colour scale, and one-tap image export with the methodology.
• BPM & musical-key detection for any track, including DSD.

⬆️ Experimental upsampling (opt-in)

Reconstruct lossless PCM to a higher sample rate through a reference-class linear-phase filter before your USB DAC — "Max" auto-picks the highest whole-number multiple your DAC supports, or pick a fixed 2× / 4× / 8×. Clearly labelled not bit-perfect, off by default, and it never touches the bit-perfect path.

📚 Library & metadata

• Fast incremental, parallel on-device scan that updates only what changed, across internal storage, SD cards and multiple folders, all merged into one library — with all-files access or per-folder picks, and exclude-subfolder rules.
• CUE single-file albums — one long FLAC/WAV/AIFF/ALAC with a .cue beside it appears and plays as its individual tracks, on both the standard and bit-perfect paths.
• Tag editor that reads and writes the full hi-res tag set (composer, ISRC, label, catalog #, BPM, key and more), with online metadata lookup and cover-art embed / folder-sidecar.
• Playlists with .m3u import / export, and AI-assisted playlist generation from a prompt.
• A built-in folder browser so you can add any folder without fighting Android's system picker.

🎤 Lyrics

• Synced, word-level karaoke lyrics with a highlight that follows the beat, loaded from LRC / TTML / KRC / YRC / QRC (beside a track or embedded).
• Choose your source — preview and pick from multiple online lyric providers before applying.
• Inline translation — translate synced lyrics to your language right in the view, on-device and offline (free), or with your own cloud translation key for higher quality.
• AI transcription for tracks that have no lyrics anywhere.

🏠 Home & discovery

• A personalized Home — a time-of-day greeting, "Jump back in", Recently added, Rediscover, your top tracks and favourites.
• An optional discovery feed — worldwide trending & new releases with artist write-ups, plus "More from artists you love" built from your own library.
• News & articles (subscribe to any RSS/Atom feed) and artist / album bios — all off by default.

☁️ Sources & network

• Stream from network shares (WebDAV, FTP, SFTP, SMB), Dropbox, DLNA / UPnP servers, the Internet Archive, internet radio and podcasts.
• AuxBridge — play any app through your USB DAC. Capture the audio of any other app (streaming services, browsers, games) with Android's playback-capture consent flow and stream it straight to your DAC through Resonāda's own exclusive driver — pick a capture rate (44.1–192 kHz), keep the volume law, DSP and visualizers, and hand back cleanly the moment you start normal playback. Honest by design: clearly labeled not bitXact, since Android decodes and mixes the source first.
• Cast to DLNA renderers (smart TVs, AV receivers, network speakers) with full session control — play/pause, next/previous, seek, track picks and even the volume keys drive the renderer while casting, and local files are served to it straight from the phone.
• A cloud cache with a user-set size cap keeps streamed tracks for reliable, bit-perfect local playback (or stream directly with nothing stored).
• Turn your phone into a UPnP / DLNA renderer and media server on your network — a dependency-free, self-contained implementation.

📊 Stats & scrobbling

• Last.fm and ListenBrainz scrobbling with configurable thresholds.
• Rich listening statistics & insights, plus a per-track Track Insights sheet with open-data enrichment (MusicBrainz, Last.fm, and more).

🎨 A crafted experience

• Clean Material 3 design with a true AMOLED-black theme option (pixels fully off on OLED panels).
• 5 selectable launcher icons whose gradient flows into the in-app accents.
• A premium, animated cosmic-dance About screen — tap to sound the Oṃ.
• A minimal, premium home-screen widget with a live progress seekbar.
• Per-track quick tools — Info, Metadata, Lyrics, Sleep timer, X-Ray and Spectrogram, all one tap from Now Playing.
• Sleep timer, native gapless (experimental), optional premium screen transitions, and one-tap update-on-launch for side-loaded installs.

🧩 Built to last

• A pure native C++ audio engine (Oboe) with streaming decoders — memory stays bounded no matter the file size.
• Plays multi-hour, multi-gigabyte hi-res and DSD files (including big single-file / CUE albums) end to end, with 64-bit file addressing so seeking stays accurate the whole way through.
• No analytics, no ads, no account required.

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📲 Install

Requires Android 11 (API 30) or newer.

• Open the latest release and download the .apk (pick arm64-v8a for any phone made since 2017).
• On your phone, tap the downloaded file.
• If prompted, allow "Install unknown apps" for your browser / file manager.
• Tap Install, then open Resonāda.
• Grant audio / storage access so it can scan your library, and (optionally) allow it to skip battery optimization for uninterrupted background playback.

The APK is signed; updates with the same signature install over the top without data loss.

🎵 Supported formats

Lossless & hi-res: FLAC · ALAC · WAV · AIFF · DSD (DSF / DFF) Lossy: MP3 · AAC / M4A · Ogg / Vorbis · Opus · WMA Surround (decoded to stereo PCM): Dolby Digital / Atmos (EAC3-JOC) · AC-3 · AC-4 · DTS

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📸 Screenshots

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🗒️ Releases

All builds are published on the Releases page, with notes describing what changed. The current line is Resonāda 1.6.1 · Satya · truth.

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❓ FAQ

Will it work with my USB DAC? Most UAC-compliant USB DACs are supported for exclusive, bit-perfect output — including native DSD and hardware-volume passthrough where the DAC exposes them. The USB DAC details screen shows exactly what your DAC reports.

Do I need a DAC to use it? No. Without a USB DAC it's a full-featured local + streaming player on your phone's own output; the bit-perfect exclusive path simply engages when a supported DAC is connected.

Is my music or usage uploaded anywhere? No. Scanning, playback and all analysis (X-Ray, fidelity, spectrogram) run entirely on-device. Online features (metadata, lyrics, discovery, scrobbling) are opt-in and only contact the services you enable.

Is the source code available? This repository distributes the official signed builds. The source is maintained privately.

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💬 Community

Join the Resonāda Telegram group for release announcements, early builds, help and feedback — and to share what your DAC is doing.

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📜 License

© 2026 R Kaurav. All rights reserved.

Resonāda is proprietary freeware — free to download and use for personal, non-commercial listening, but it is not open source.

You may:

• Install and use the official signed builds on your own devices, at no cost.
• Share a link to the Releases page.

You may not:

• Decompile, reverse-engineer, modify, or create derivative works of the app.
• Redistribute, rehost, or sell the APK or any part of it.
• Use the name, icons, or assets without written permission.

The software is provided "as is", without warranty of any kind, express or implied. The author is not liable for any damages arising from its use.

Third-party open-source components are used under their respective licenses (e.g. the bundled Apple ALAC decoder under the Apache License 2.0). The full list of components and their notices is available in-app under Settings → About → Open-source licenses.

For any other use, contact the author at ralkau@proton.me.

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