what is sonybridge fr?

SonyBridge is an unofficial, open source desktop app that lets you control Sony headphones directly from macOS, Windows, or Linux, without needing your phone. Normally, features like noise cancelling, ambient sound, the equalizer, and Sony's audio upscaling are only available through Sony's mobile only app. SonyBridge talks to the headphones over Bluetooth using Sony's own communication protocol, which the project's authors worked out by studying how the official app behaves. An earlier project only understood Sony's older, first generation protocol, so newer headphones like the WH-CH720N or the XM4 and XM5 series would simply fail to connect. SonyBridge adds support for the newer, second generation protocol, and automatically detects and speaks whichever generation a given headset uses. Features include adjustable noise cancelling and ambient sound levels, a focus on voice passthrough mode, equalizer presets plus a fully manual five band mode, Sony's DSEE audio upscaling, live battery percentage including separate earbud and case levels for true wireless models, codec and firmware information, and extra controls like auto power off that only appear if your specific headset supports them. The app automatically connects to an already paired Sony headset and mirrors button changes made directly on the headphones themselves. On macOS the app is a native SwiftUI application, installable through Homebrew or as a direct download that needs one manual security step since it is not notarized by Apple. Windows has a beta build available for download, and Linux users build the app themselves from source using CMake, with a couple of system libraries required first. Only one specific headphone model has been fully verified by hand so far, though many other Sony models using the same protocol family are expected to work at least partially. The project welcomes bug reports and testing feedback from owners of other Sony headphone models.