Bitperfect Player

The only AI powered bitperfect player for today with NPU usage. Own Low-Level audio engine with professional-grade DSP effects, USB DAC drivers, Android Auto, Chromecast, Beautiful UI and more.

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Inspiration

For years, Android audiophiles have faced a frustrating trade-off: use legacy players with great sound engines trapped inside clunky, 2012-era interfaces, or use modern streaming apps that degrade audio through Android's system mixer.

We built Bitperfect Player to prove you don't have to compromise:

  • Zero OS interference: A ground-up Rust audio engine with proprietary UAC1/UAC2 USB drivers that bypass Android AudioFlinger entirely.
  • Studio-grade acoustics: Native upsampling, tube simulation, convolution, and an extensible plugin system.
  • Modern polish: A silky-smooth 60/120 FPS interface that looks, moves, and feels like a tier-one consumer app.
  • AI Features: Sophisticated fully local true AI models for audio enhancement and voice/instruments isolation AI Karaoke model that runs locally on NPU and CPU Lite models to run directly on any phone through CPU. Unique technology - available only in bitperfect player. AI Mix model creating unique mixes based on your library, creating almost 200 params for each track by real local AI model - nothing sends on the cloud, nothing disturb your privacy.

What it does

Bitperfect Player gives listeners bitperfect, studio-grade playback by taking direct low-level control of Android audio hardware:

  • Bitperfect USB & DAP Output: Custom USB drivers stream uncompressed audio directly to external DACs, with tailored hardware profiles for HiBy, iBasso, and Astell & Kern players.
  • Live Signal Path Inspector: Transparent real-time UI showing every step from audio file to DAC pins, confirming whether audio is pristine or processed.
  • Pro DSP Suite: Up to 8x upsampling, PCM-to-DSD conversion, parametric EQ, tube amp modeling, crossfeed, and dynamic range track analysis.
  • Edge AI Audio Processing: First-of-its-kind, real-time AI audio restoration running on-device via Qualcomm & MediaTek NPUs (reconstructing lossy audio up to 48 kHz), plus an on-device vocal isolator for instant karaoke.
  • Connectivity & Cast Hub: Stream out via Chromecast, DLNA/UPnP, ShAirPlay, and MPD, or use the device as an LMS/Roon receiver (through slimproto). Includes 2,000+ internet radio stations and Android Auto.

How we built it

  • Rust Audio Core: Low level Rust engine for all audio processing allowed us get pure sound engine with great speed and absolute audio quality.
  • Custom Low-Level Drivers: Wrote our own UAC1 and UAC2 USB audio class implementation directly over Android USB host APIs.
  • ARM NEON / SIMD: Hand-tuned assembly routines for DSP filters, upsampling, and mixing to minimize battery drain.
  • Jetpack Compose + KMP: Clean, declarative UI architecture ready for future iOS porting while holding a strict 60/120 FPS frame budget.
  • Community Lab Tested: Developed in a physical lab with dozens of DACs, DAPs, and headphones, refined by testing feedback from hundreds of audiophiles.

Challenges we ran into

  • Vendor Fragmentation: Supporting devices back to Android 8 meant hacking around vendor-specific USB bugs and hidden, OS-level sample-rate conversions.
  • On-Device NPU Deployment: Training, quantizing, and running custom neural models in real time on mobile NPUs without overheating or thermal throttling - plus engineering an efficient CPU fallback for older devices.
  • 120 FPS Under Load: Keeping UI animations locked at high refresh rates while the background thread handles heavy DSP, real-time decoding, and continuous USB audio streaming.

Accomplishments that we're proud of

  • Designed and shipped a native Rust audio engine and custom USB DAC driver stack from scratch.
  • Shipped the world’s first real-time neural audio restoration engine running directly on smartphone NPUs.
  • Matched or beat the sound fidelity of 10-year industry staples while delivering a modern, beautiful user experience.

What we learned

  • To deliver true high-end audio on Android, you must bypass the OS stack entirely: Android should only ever be a UI shell over a bare-metal native core.
  • Deploying neural models across fragmented mobile NPUs is challenging, but the battery and latency gains make it well worth the effort.
  • Lab measurements only get you halfway - extensive real-world testing with the audiophile community is essential.

What's next for Bitperfect Player

  • Native Qobuz Streaming: In discussions for an official integration to bring lossless catalog streaming directly into the player.
  • Bitperfect Link: Turn any spare phone or DAP into a headless, bitperfect network streamer controlled remotely from your primary device.
  • Community Plugin SDK: Public Plugin SDK allowing developers to add custom music sources and DSP filters providing variety of additional functionality for the main app.

Built With

  • androidndk
  • jetpack
  • kmp
  • koin
  • kotlin
  • neon/simd
  • roomdb
  • rust
+ 8 more
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