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HXAudio-Desktop
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HXAudio for Windows Desktop
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HXAudio-Desktop
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# HXAudio APO version: 1.0.1b (internal test) Author: Huber_HaYu ## APO global mode (recommended) The recommended mode installs `HXAudioApo.dll` as a Windows endpoint audio processing object. It does not install a kernel driver and does not require test-signing mode or disabling Secure Boot. The installer removes the HXAudio virtual device before enabling this mode. A LocalSystem endpoint guard attaches HXAudio as the only post-mix endpoint effect on every selected terminal hardware render endpoint and monitors the MMDevices render tree for devices that are connected later. Software mixer/cable endpoints remain intermediate transport nodes so the signal is processed once at the physical output. SFX, MFX, EFX, composite and offload software-effect values are backed up per endpoint and removed while APO mode is active, then restored exactly during a mode switch or uninstall. APO installation and mode switching are transactional. A LocalSystem endpoint guard performs protected `MMDevices` changes, rebuilds the Windows audio endpoint stack, and verifies every active render endpoint before Setup reports success. Covering an existing APO installation uses a content-addressed DLL side by side, so the image currently loaded by `audiodg.exe` never forces a reboot. Switching from the virtual backend first stops its router, removes the root device and driver package, and then completes the same verified APO flow. The APO processes the endpoint's 32-bit floating-point stream in place. Its real-time callback performs no registry access, allocation, or blocking wait. DSP settings are stored in the machine settings key; a non-real-time watcher reloads them while the audio graph is running. APO mode leaves the native Windows shared-audio limiter enabled and does not install the former engine bypass service. ## Virtual sound-card mode This compatibility mode installs `HXAudio Virtual Output` and routes its loopback stream to one or more selected physical endpoints. It remains useful when a separate virtual playback endpoint is required. Because its kernel driver uses a personal self-signed certificate, it requires Windows test-signing mode and Secure Boot must not block that policy. The router uses shared event-driven WASAPI clients, per-output render workers, and a 32-bit float DSP bus. Device invalidation and MMDevice changes rebuild the session. A bounded silence watchdog also rebuilds an orphaned loopback client after a player destroys one song session and opens the next, preventing a formally valid old session from leaving subsequent songs silent. Virtual mode also installs the HXAudio endpoint APO as a unity-gain effect-slot owner on terminal physical outputs. This isolates Dolby, DTS, Nahimic, MaxxAudio and other OEM software APO components while leaving the virtual router's existing PEQ and virtual-bass path unchanged. In `Virtual` mode the endpoint APO is verified sample-transparent, so DSP is not applied twice. ## DSP and control panel Both modes use the same `HXAudio 控制面板`, total gain, PEQ and virtual bass settings. In APO mode each endpoint can be enabled or bypassed independently, and the endpoint guard applies that selection to existing and newly inserted USB, wired, Bluetooth and other Windows render endpoints. The PEQ implements peak, low-shelf, high-shelf, low-pass, high-pass and notch biquads. Total gain is limited to -30 dB through +30 dB, while every PEQ band and the editor Y-axis are limited to -40 dB through +40 dB. Older profiles are scaled proportionally into the new PEQ range. Virtual bass supports the 2/3/4 and 3/5/7 presets plus three custom positive floating-point multipliers. APO mode sends the processed floating-point stream back to the Windows shared audio engine with its native limiter enabled. Neither backend changes the Windows endpoint volume automatically; endpoint volume changes only when the user operates a device fader. ## Build From an elevated PowerShell prompt: ```powershell .\build-release.ps1 ``` The signed APO version-1.0.1b installer is built with `.\build-apo-release.ps1` and written to: ```text artifacts\HXAudio-APO-Setup-1.0.1b-x64.exe ```
