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Releases: NaughtyDogOfSchrodinger/lossless-checker

v0.2.0 — native DSD authenticity checking

13 Jun 01:09
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v0.2.0
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v0.2.0 — native DSD authenticity checking Latest
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Highlights

Native DSD authenticity checking — the big new feature. The check-dsd subcommand detects fake / PCM-sourced DSD (CD or lossy material "washed" into a DSD container) by analyzing the noise-shaping signature directly from the 1-bit stream — no ffmpeg required.

  • 🎯 check-dsd — native .dsf (DSF) and .dff (DSDIFF) parsing; per-file verdict (genuine / suspicious) from the noise-shaping slope, ultrasonic energy, and baseband cutoff.
  • 🧱 22.05 kHz CD brick-wall detection — flags the digital-master fingerprint that survives a CD→DSD re-modulation.
  • 📈 export-spectrum — dump the averaged power spectrum to CSV for your own analysis / threshold calibration.

Accuracy fixes (validated against real albums + ffmpeg PCM decodes)

  • DSD256/512 no longer false-flagged. The noise-shaping slope/HF band now scales with the DSD rate — DSD256's shaping peaks above 100 kHz, so the fixed 30–100 kHz window was reading it as "flat" and convicting genuine high-rate DSD.
  • Genuine dark/quiet masters no longer mistaken for a lossy cutoff. The baseband-cutoff verdict now requires a real brick-wall edge (music reaching the cut), not the gradual tail of a soft passage.

Performance

  • realfft for the FFT (~2× faster transform).
  • Parallel per-file Welch FFT, lossless (bit-identical to a single-threaded sweep), with no nested-rayon oversubscription on multi-file library scans (peak memory −43% on a 32-file scan).
  • Lookup-table 1-bit unpacking; 4-term Blackman-Harris analysis window.

Also since v0.1.0

  • Bilingual output (中文 default, --lang en for English).
  • Hi-res-aware detection (empty-HF / fake hi-res).

Install

Prebuilt binaries for macOS (arm64 + x86_64), Linux (gnu + musl), and Windows are attached below. See the README for usage.

Full Changelog: v0.1.0...v0.2.0

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v0.1.0

10 Jun 09:37
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v0.1.0
9d79c81

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v0.1.0

Full Changelog: https://github.com/NaughtyDogOfSchrodinger/lossless-checker/commits/v0.1.0

Full Changelog: https://github.com/NaughtyDogOfSchrodinger/lossless-checker/commits/v0.1.0

Full Changelog: https://github.com/NaughtyDogOfSchrodinger/lossless-checker/commits/v0.1.0

Full Changelog: https://github.com/NaughtyDogOfSchrodinger/lossless-checker/commits/v0.1.0

Full Changelog: https://github.com/NaughtyDogOfSchrodinger/lossless-checker/commits/v0.1.0

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