Glossary
SlimeVR
The open-source project whose software (the SlimeVR Server) drives all SlimeVR-compatible trackers, IBIS included. Maintained at slimevr.dev.
SlimeVR Server
The desktop app on your PC that talks to your trackers via the USB receiver, manages body configuration, and feeds data into SteamVR or VRChat OSC.
SlimeVR GUI
The web-style interface that opens when you launch the SlimeVR Server. Where you do all setup and configuration.
IBIS tracker
A VYRO VR-made, SlimeVR-compatible tracker using the nRF 2.4 GHz wireless protocol.
nRF
Nordic Semiconductor’s family of wireless microcontrollers. IBIS trackers are built around the nRF52.
Receiver / dongle
The small USB stick that listens for tracker radio traffic and relays it to the SlimeVR Server. Required for IBIS trackers.
IMU
Inertial Measurement Unit — the motion sensor inside each tracker (IBIS uses the LSM6DSV). Measures rotation rate and acceleration.
Mounting
Which physical orientation the tracker is in when worn (face up, face down, USB-port toward foot, etc.). Mounting calibration figures this out automatically so you don’t have to.
Mounting calibration
A short routine in the SlimeVR setup wizard where you stand and pose in specific ways so the server can figure out each tracker’s mounting.
Body proportions
The lengths of your bones (femur, tibia, torso, etc.). SlimeVR needs these to translate tracker rotations into limb positions.
AutoBone
The SlimeVR feature that measures your body proportions automatically by watching you walk and squat in VR. Usually beats manual entry.
Full reset
Re-zeros all tracker rotations to your current pose. Use when drift has built up. Stand straight, face forward, trigger.
Yaw reset
Re-zeros only horizontal (left/right facing) drift. Faster and less invasive than a full reset; safe to trigger often.
Mounting reset
Re-runs mounting calibration on the fly. Use if a tracker shifted on your body or you put it on the wrong way around.
Stay Aligned
A SlimeVR Server 0.16+ feature that automatically corrects yaw drift while you play, reducing how often you need yaw resets.
DFU mode
“Device Firmware Update” mode. A special boot state on the tracker for re-flashing firmware. Triggered by 4-5 button presses — don’t do this unless you’re updating firmware.
OSC
Open Sound Control — the message protocol VRChat (and some other apps) use to receive tracker data on standalone headsets like Quest.
SteamVR driver
The piece of software that exposes SlimeVR trackers to SteamVR as virtual Vive-style trackers. Installed automatically by the SlimeVR Server.
Feeder app
A separate utility that forwards data from another tracking system (like a Vive lighthouse setup) into SlimeVR for hybrid use. Not needed for IBIS-only setups.