EchoXR

EchoXR runs Echo VR through OpenXR, with no Oculus or Meta app: on Windows on SteamVR, and on Linux through Proton on SteamVR, Monado or WiVRn. It answers Echo's Oculus calls with Revive's OpenXR backend. There's no UI; it writes log files.

The Echo VR launcher installs and starts EchoXR for you. To set it up by hand, take the latest EchoXR-OpenXR-v<version>.zip from Releases.

Windows

1. Install SteamVR and check that your headset works in it.
2. Unzip the release into Echo's bin\win10 folder, next to echovr.exe.
3. Run bin\win10\EchoXR.exe.

Linux

1. Unzip the release into Echo's bin/win10 folder.
2. Copy LibOVRPlatform64_1.dll and LibOVRP2P64_1.dll from a Windows PC's C:\Program Files\Oculus\Support\oculus-runtime\ into bin/win10.
3. Start SteamVR, monado-service or wivrn-server, and wake the headset.
4. Run bin/win10/EchoXR/echoxr-linux.sh --check, then without --check.

It needs Steam with Proton 9 or newer (or GE-Proton) and an active OpenXR runtime. No OpenVR runtime (xrizer, OpenComposite) is needed.

When Echo doesn't start

Look in bin/win10/EchoXR/launcher.log and runtime.log. EchoXR's exit codes:

code	meaning
5	no OpenXR runtime answered: start SteamVR, Monado or WiVRn first
6	no headset: connect it and wake it up
2, 3, 4, 7	install problem: see the log

Only the current live build of Echo is supported.

More

docs/ADVANCED.md has the details: how it works, Linux under the hood, every log and exit code, and building. xr/README.md explains the runtime.

Credits: EchoXR by heisthecat31 (this fork keeps only its OpenXR layer); Revive by LibreVR (MIT); the OpenXR SDK by Khronos (Apache 2.0); Microsoft Detours (MIT). Findings from RiftLift shaped the 0.4.0 fixes.