Bellweather Audio Attest is an open-source, headless C++ audio-regression proof layer from Bellweather Studios.

It provides four command-line verbs (bless, verify, compare, scan) over rendered WAV files, cryptographically signed golden references, and detector lanes for loudness (BS.1770 / EBU R128), THD, aliasing, stereo, spectral mask, and numeric hygiene. It is JUCE-free by design: it validates the audio a plugin, DAW, or renderer already produced; it does not host plugins.

The project is intended for CI regression proof, inspection, and reuse. A worked case study verifies the free Barometer metering plugin across macOS, Linux, and Windows, showing how a real plugin's rendered output is blessed once and verified on every later build without turning the repository into a plugin download channel.

Included:

• Apache-2.0 source release
• CMake build with cross-platform CI (macOS / Linux / Windows)
• bless / verify / compare / scan CLI over rendered WAV files
• Cryptographically signed reference format (DSSE envelope, per-detector trust boundary)
• Detector lanes: loudness (BS.1770 / EBU R128), THD, aliasing, stereo, spectral mask, numeric hygiene
• Barometer case study with per-OS golden references

Not included:

• Prebuilt binaries or installers
• Plugin hosting or rendering (bring your own render)
• Signing keys or a hosted verification service
• Consumer support channel

Build it yourself. This is a source release. Clone the repository, build with the included CMake presets, and run the proofs via CTest. The repository is a code reference and CI building block, not a binary distribution.

Project page: https://www.bellweatherstudios.com/bellweather-audio-attest

Source: https://github.com/keithhetrick/bellweather-audio-attest