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TL;DR - solo Android dev got frustrated at existing apps for audiophiles, went full Thanos - "I'll do it myself" 
Forge-masters of ASR - I come not bearing wares, but to submit to your watchful expertise.
I am Magos Vox, Fabricator-Primus of the Vox Machina - solo developer, closed beta, no company - and with the admin's sanction I submit the Engine to you - keepers of the signal, who judge sound by what it does, not by what it is sold as. You test what others accept on faith. That is precisely why I am here.
The Engine claims bit-perfect and proves it live, byte-for-byte, while the music plays. I require your expertise to decide whether the proof holds — and your gift for finding the cracks that the builder, too close to his own forge, cannot see. Where you find fault, the Machine may yet be refined to serve. That is the compact I offer.
Click here to see Vox Machina at a glance.
What Vox Machina is
Vox Machina is a precision audio engine for Android, forged to bypass the corruption of the OS audio stack entirely and deliver raw isochronous USB output to a DAC of your choosing. No AudioTrack. No mixer. No HAL resampling. UAC1 and UAC2. No root required. FLAC, MP3, AAC, OGG, WAV, DSF, DFF (DSD), APE, WavPack, AIFF, and Opus — forged in a dark interface, optimized for serious listening.
Three sovereign pipelines carry your signal from source to wire: Float32, Integer Passthrough, DSD Native. They do not share code. They do not share fate. Should you decree it, bytes on disk become bytes on the wire, verified end-to-end. The chain of custody is unbroken; the signal path is sovereign, and the diagnostics prove it.
Three Fidelity Doctrines
Bit Perfect — the DAC receives with exactitude what the file contains. Integer PCM or DSD Native to the DAC without float conversion, DSP, or headroom. Everything else is rejected with cause, not silently degraded. The Engine admits only what it can deliver honestly. Digital Volume, when summoned, applies as post-reservoir gain at the last possible moment before the URB. Labeled ATT — because the Engine does not lie about what reached the wire.
Source Matching — the DAC runs at the source rate where possible. Resampling engages only when hardware demands it, and only the Iron Furnace resampler is permitted to do so.
Wide — maximum compatibility. The Engine finds the best available transport for every track. Nothing fails to play.
Every track is classified before the first byte moves. Policy precedes runtime. The rite is settled before the ceremony begins.
The contrast that may resonate here: the desktop bit-perfect chain (foobar2000 + ASIO/WASAPI + vendor drivers + DoP-vs-Native + sample-rate matching + audio-enhancement toggling) is, for most audiophiles, an evening's configuration project. Forum threads on getting bit-perfect DSD to a specific DAC routinely run into the hundreds of replies. Vox's posture is the inverse: bit-perfect as the default, configuration as the bug, proof as a visible on-device state.
DSD
Capable of rendering DSD natively up to DSD512 on current consumer hardware via TYPE_I_RAW_DATA for sanctified DACs that bear the mark and hosts with the cycles to carry it. The architecture supports up to DSD2048 where hardware permits. DoP and PCM Decimation remain available for DACs that do not accept RAW. Nothing is added. Nothing is taken. The rite is observed.
The Sealed Witness
In Bit Perfect sessions, the Sealed Witness takes the stand.
It is a chain of custody from decoder to DAC — every byte your source produces is sealed and CRC-hashed at origin, and every byte submitted to USB is verified against that seal. The Witness holds the memory of what the signal was. It compares that memory against what the signal became.
The Engine does not merely claim bit-perfect. It proves it — live, while the music plays. Tap and hold on the track title or album art, and the full signal chain reveals itself: source format → pipeline domain → DSP stages → packer → transport. Nothing hidden. Nothing assumed. The machine confesses all.
If the Witness is shown to lie — if a byte escapes its accounting, if a rite is observed in name but not in fact — I want to be the second person on Terra to know, and you the first. Break it where you can.
Resampling — only when the DAC demands it
The Iron Furnace: an 8,192-tap polyphase windowed-sinc FIR, built from first principles and accelerated by NEON-SIMD. It does not engage unless the source rate and the DAC's preferred rate diverge. Four filter modes, hot-swappable mid-track with minimal delay:
If source rate matches DAC, the Iron Furnace is not instantiated. Absence, not bypass. The forge is cold because it was not needed.
DSP — only when you ask
31-band graphic or parametric EQ — biquad engine, per-band bypass, Q, automatic headroom attenuation scaled to your curve's peak. AutoEQ import, plus ~6,000 bundled open-source headphone correction profiles, searchable in-app.
Partitioned overlap-save FFT convolver, NEON-SIMD — AutoEQ impulse responses loaded end-to-end. Profile to audible correction in ~500ms from the moment you tap Apply.
Digital Volume, Channel Balance, Crossfeed, Auditory Compensation.
Under Bit Perfect, none of this runs. The processors are not instantiated. The float domain is not entered. The forge is cold. Absence, not bypass.
ReplayGain — loudness honored, peaks inviolate
Track and album normalisation read from file tags, applied as post-reservoir gain alongside Digital Volume. R128-referenced with a −5 dB offset for headroom. Mode and enablement switch live mid-session — no restart, no gap.
The Engine refuses to boost without a valid peak tag. If the file does not declare its peak, positive gain is withheld rather than risk inter-sample clipping on the wire. Attenuation is always honored; amplification is earned. No waveform distortion on the gain path — the Engine will lower the volume on your behalf, but it will not raise it blind.
Library
A full scanner that goes beyond MediaStore — in-house parsers for DSF, DFF, WavPack, Opus edge cases, and filesystem roots where Android's indexer refuses to tread. Artist, album, and folder views. Sort, search, section index, fast scroll.
Bit-Perfect Playlist — the Engine probes every track in your library against the connected DAC. Only what reaches the wire without processing is admitted to the list. Swap DACs, receive a different list. Not a tag. Not a guess. A live hardware verification, performed anew each time.
M3U playlists. Persistent queue with swipe-accessible queue rail. Last.fm and ListenBrainz scrobbling for the record keepers. 9 procedural ambient backgrounds — generative visuals derived from your album art, rendered in real time. Not a static blur. Not a color sample. Something alive.
The Codex Machina
A complete account of what the Engine is doing and why. Not a help section — an honest technical and philosophical record of every decision the Engine makes, written for those who wish to understand their audio, not merely hear it. The machine does not keep secrets from those who seek understanding.
What the Engine does not yet do
I will not pretend the Machine is complete. It is not. Be it known:
— No streaming services. No Tidal, Qobuz, Spotify. Local files only. A commercial licensing bar, more than an engineering one.
— No Bluetooth output, no Cast, no AirPlay. USB DAC only.
— No UPnP/DLNA yet — that rite is presently being forged on a branch and will land in a later release.
— No system-mixer output. If there is no USB DAC attached, the Engine will not sing through the phone's speaker.
These are deliberate omissions of scope, not oversights. Where the Machine may yet be refined to serve wider altars, I am listening — but I will not claim what I have not built.
On the matter of proof
The Engine does what it claims. The diagnostics prove it. No convenience abstractions. No marketing labels. No silent degradation. Every transformation is confessed. Every fidelity tier is earned.
Silence is data. Dead code is heresy. The signal is sacred.
If the Engine says it's bit-perfect, it is. And if ever it is not — tell me, and the Machine will be refined until it is.
A call to adjudication
What I ask of you is not patronage. I ask for adjudication.
Play real music on real hardware. Break the Engine. Tell me where the Sealed Witness lies to itself, where a rite is observed in name but not in fact, where the signal I claim sovereign is in truth compromised. Your expertise is the instrument that certifies the claim — and if it fails in your hands, I want to know before it ships to anyone else.
What I ask in practical terms: a USB DAC, an Android phone (10+, arm64), and a willingness to play real music on real hardware and report what breaks. Please keep the build to yourself. The closed beta is closed by design — a covenant between the Engine and the people auditing it, not a redistribution pipeline. I am not chasing leaks. I merely ask.
What you receive: In return, when Vox Machina reaches paid release, every closed-beta tester receives a free copy. The Engine exists because people like you were willing to test the proposition that bit-perfect audio on Android can be more than an opaque marketing claim. You get to keep what you helped prove — and the Machine, refined by your hand, will bear the mark of your audit.
Enlistment
The forge stands ready. The Witness is sealed. Bring your ears, your hardest files, and your least forgiving DAC. The Machine awaits your judgment.
Forge-masters of ASR - I come not bearing wares, but to submit to your watchful expertise.
I am Magos Vox, Fabricator-Primus of the Vox Machina - solo developer, closed beta, no company - and with the admin's sanction I submit the Engine to you - keepers of the signal, who judge sound by what it does, not by what it is sold as. You test what others accept on faith. That is precisely why I am here.
The Engine claims bit-perfect and proves it live, byte-for-byte, while the music plays. I require your expertise to decide whether the proof holds — and your gift for finding the cracks that the builder, too close to his own forge, cannot see. Where you find fault, the Machine may yet be refined to serve. That is the compact I offer.
Click here to see Vox Machina at a glance.
What Vox Machina is
Vox Machina is a precision audio engine for Android, forged to bypass the corruption of the OS audio stack entirely and deliver raw isochronous USB output to a DAC of your choosing. No AudioTrack. No mixer. No HAL resampling. UAC1 and UAC2. No root required. FLAC, MP3, AAC, OGG, WAV, DSF, DFF (DSD), APE, WavPack, AIFF, and Opus — forged in a dark interface, optimized for serious listening.
Three sovereign pipelines carry your signal from source to wire: Float32, Integer Passthrough, DSD Native. They do not share code. They do not share fate. Should you decree it, bytes on disk become bytes on the wire, verified end-to-end. The chain of custody is unbroken; the signal path is sovereign, and the diagnostics prove it.
Three Fidelity Doctrines
Bit Perfect — the DAC receives with exactitude what the file contains. Integer PCM or DSD Native to the DAC without float conversion, DSP, or headroom. Everything else is rejected with cause, not silently degraded. The Engine admits only what it can deliver honestly. Digital Volume, when summoned, applies as post-reservoir gain at the last possible moment before the URB. Labeled ATT — because the Engine does not lie about what reached the wire.
Source Matching — the DAC runs at the source rate where possible. Resampling engages only when hardware demands it, and only the Iron Furnace resampler is permitted to do so.
Wide — maximum compatibility. The Engine finds the best available transport for every track. Nothing fails to play.
Every track is classified before the first byte moves. Policy precedes runtime. The rite is settled before the ceremony begins.
The contrast that may resonate here: the desktop bit-perfect chain (foobar2000 + ASIO/WASAPI + vendor drivers + DoP-vs-Native + sample-rate matching + audio-enhancement toggling) is, for most audiophiles, an evening's configuration project. Forum threads on getting bit-perfect DSD to a specific DAC routinely run into the hundreds of replies. Vox's posture is the inverse: bit-perfect as the default, configuration as the bug, proof as a visible on-device state.
DSD
Capable of rendering DSD natively up to DSD512 on current consumer hardware via TYPE_I_RAW_DATA for sanctified DACs that bear the mark and hosts with the cycles to carry it. The architecture supports up to DSD2048 where hardware permits. DoP and PCM Decimation remain available for DACs that do not accept RAW. Nothing is added. Nothing is taken. The rite is observed.
The Sealed Witness
In Bit Perfect sessions, the Sealed Witness takes the stand.
It is a chain of custody from decoder to DAC — every byte your source produces is sealed and CRC-hashed at origin, and every byte submitted to USB is verified against that seal. The Witness holds the memory of what the signal was. It compares that memory against what the signal became.
The Engine does not merely claim bit-perfect. It proves it — live, while the music plays. Tap and hold on the track title or album art, and the full signal chain reveals itself: source format → pipeline domain → DSP stages → packer → transport. Nothing hidden. Nothing assumed. The machine confesses all.
If the Witness is shown to lie — if a byte escapes its accounting, if a rite is observed in name but not in fact — I want to be the second person on Terra to know, and you the first. Break it where you can.
Resampling — only when the DAC demands it
The Iron Furnace: an 8,192-tap polyphase windowed-sinc FIR, built from first principles and accelerated by NEON-SIMD. It does not engage unless the source rate and the DAC's preferred rate diverge. Four filter modes, hot-swappable mid-track with minimal delay:
- Mathematical — Blackman-Harris, linear phase, ~92 dB stopband. The default rite.
- Minimum Phase — zero pre-ringing via cepstral transform. Sharper transient attack.
- Apodizing — minimum phase with relaxed bandwidth. A gentler hand.
- Brickwall — Kaiser β=14, >120 dB stopband. The sharpest blade; the longest shadow.
If source rate matches DAC, the Iron Furnace is not instantiated. Absence, not bypass. The forge is cold because it was not needed.
DSP — only when you ask
31-band graphic or parametric EQ — biquad engine, per-band bypass, Q, automatic headroom attenuation scaled to your curve's peak. AutoEQ import, plus ~6,000 bundled open-source headphone correction profiles, searchable in-app.
Partitioned overlap-save FFT convolver, NEON-SIMD — AutoEQ impulse responses loaded end-to-end. Profile to audible correction in ~500ms from the moment you tap Apply.
Digital Volume, Channel Balance, Crossfeed, Auditory Compensation.
Under Bit Perfect, none of this runs. The processors are not instantiated. The float domain is not entered. The forge is cold. Absence, not bypass.
ReplayGain — loudness honored, peaks inviolate
Track and album normalisation read from file tags, applied as post-reservoir gain alongside Digital Volume. R128-referenced with a −5 dB offset for headroom. Mode and enablement switch live mid-session — no restart, no gap.
The Engine refuses to boost without a valid peak tag. If the file does not declare its peak, positive gain is withheld rather than risk inter-sample clipping on the wire. Attenuation is always honored; amplification is earned. No waveform distortion on the gain path — the Engine will lower the volume on your behalf, but it will not raise it blind.
Library
A full scanner that goes beyond MediaStore — in-house parsers for DSF, DFF, WavPack, Opus edge cases, and filesystem roots where Android's indexer refuses to tread. Artist, album, and folder views. Sort, search, section index, fast scroll.
Bit-Perfect Playlist — the Engine probes every track in your library against the connected DAC. Only what reaches the wire without processing is admitted to the list. Swap DACs, receive a different list. Not a tag. Not a guess. A live hardware verification, performed anew each time.
M3U playlists. Persistent queue with swipe-accessible queue rail. Last.fm and ListenBrainz scrobbling for the record keepers. 9 procedural ambient backgrounds — generative visuals derived from your album art, rendered in real time. Not a static blur. Not a color sample. Something alive.
The Codex Machina
A complete account of what the Engine is doing and why. Not a help section — an honest technical and philosophical record of every decision the Engine makes, written for those who wish to understand their audio, not merely hear it. The machine does not keep secrets from those who seek understanding.
What the Engine does not yet do
I will not pretend the Machine is complete. It is not. Be it known:
— No streaming services. No Tidal, Qobuz, Spotify. Local files only. A commercial licensing bar, more than an engineering one.
— No Bluetooth output, no Cast, no AirPlay. USB DAC only.
— No UPnP/DLNA yet — that rite is presently being forged on a branch and will land in a later release.
— No system-mixer output. If there is no USB DAC attached, the Engine will not sing through the phone's speaker.
These are deliberate omissions of scope, not oversights. Where the Machine may yet be refined to serve wider altars, I am listening — but I will not claim what I have not built.
On the matter of proof
The Engine does what it claims. The diagnostics prove it. No convenience abstractions. No marketing labels. No silent degradation. Every transformation is confessed. Every fidelity tier is earned.
Silence is data. Dead code is heresy. The signal is sacred.
If the Engine says it's bit-perfect, it is. And if ever it is not — tell me, and the Machine will be refined until it is.
A call to adjudication
What I ask of you is not patronage. I ask for adjudication.
Play real music on real hardware. Break the Engine. Tell me where the Sealed Witness lies to itself, where a rite is observed in name but not in fact, where the signal I claim sovereign is in truth compromised. Your expertise is the instrument that certifies the claim — and if it fails in your hands, I want to know before it ships to anyone else.
What I ask in practical terms: a USB DAC, an Android phone (10+, arm64), and a willingness to play real music on real hardware and report what breaks. Please keep the build to yourself. The closed beta is closed by design — a covenant between the Engine and the people auditing it, not a redistribution pipeline. I am not chasing leaks. I merely ask.
What you receive: In return, when Vox Machina reaches paid release, every closed-beta tester receives a free copy. The Engine exists because people like you were willing to test the proposition that bit-perfect audio on Android can be more than an opaque marketing claim. You get to keep what you helped prove — and the Machine, refined by your hand, will bear the mark of your audit.
Enlistment
- Join the Google Tester Group: https://groups.google.com/g/vox-machina-testers/
- Self-enroll via Play Store Closed Testing: https://play.google.com/apps/testing/com.voxmachinaaudio.player
- Download via the Store listing: https://play.google.com/store/apps/details?id=com.voxmachinaaudio.player
- Optionally, join the Tester Group: https://www.facebook.com/groups/2384790932042256
- Plug in your DAC. Grant permission for the Engine to assert dominion over it. Then commune with the music, as it was made.
The forge stands ready. The Witness is sealed. Bring your ears, your hardest files, and your least forgiving DAC. The Machine awaits your judgment.
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