Real knobs for your PC.

The Windows client for deej. Volume for Windows and your apps, brightness and more, straight from the Arduino mixer on your desk.

Download for Windows

View on GitHub

Version 1.5.1Windows 10 or 1132 or 64-bitAny deej board

Installs for your user only, so it needs no administrator rights. The installer isn’t code-signed yet: if SmartScreen steps in, click More info, then Run anyway. Your Arduino sketch stays as it is.

AVol BScreens CMusic app DNight EZoom

Try it: turn a knob

WeeJ Settings

Knobs

AMaster volume
BScreen 1 brightness
Screen 2 brightness
CMusic app
DNight light warmth

One knob, several jobs.

The volume of Windows, your mic, one app, the focused app or every other app. A screen’s brightness or contrast, Night light, a keyboard backlight, screen zoom. Tick several jobs in Settings, of any kind, and they all follow the knob.

BScreen 1

BScreen 2

A flyout like Windows’ own.

Turn a knob and the indicator shows up on the screen that knob controls, in the style of Windows 11, with the app’s own icon for an app’s volume. Brightness lands once the knob settles, so a screen never flickers through every step.

WeeJ Calibration

Knob B

Found it. Now turn it back and forth, from one end to the other, for 20 seconds. The timer only runs while it turns. Skip if it doesn’t need cleaning.

6 seconds left

CancelSkip

Finds your knobs by itself.

Calibrate opens when your board first connects. Move each knob from end to end, and WeeJ works out how many you have and which input each is on. Then 20 seconds of turning sweeps a jumpy pot clean.

Any knob, any job.

One per knob, or several of any kind. Volumes follow the knob as it turns, the rest land once it settles.

Master volume
Microphone volume
System sounds
Apps
Focused app
Other apps
Built-in display brightness
Brightness
Contrast
Night light warmthExperimental
External keyboard backlight
Screen zoom

Lives in the tray. A left click opens Settings, a right click opens the menu. It reconnects on its own, can launch at login and installs updates in one click.
Real per-app volume. WeeJ turns the same slider you see in the Volume mixer. Nothing is captured or delayed.
Profiles on a shortcut. Switch every knob’s jobs at once, from the tray or with a shortcut from any app.
No jumps. A knob takes up a new job the next time you move it, so switching profiles never jumps the volume or a screen.
Follows your audio device. Switch outputs or inputs, Bluetooth headphones included, and the knobs follow.
Any number of knobs. As many as your sketch sends, up to 26. One switch inverts them all for pots wired the other way round.
Same firmware. Speaks the deej serial protocol, unchanged, at 9600 baud or whatever your sketch uses.
Coming from deej? Import from deej… turns your deej config.yaml into a profile.
Speaks 12 languages. It asks for yours on first launch, starting from Windows’ own, and switches at once, open windows included.

What you need

Windows: 10 or 11, 32 or 64-bit
Board: Any deej, over USB
External screens: DDC/CI turned on in the monitor’s menu
Anything else?: Nothing, Windows already has it all

Quit deej first: only one app can hold the board’s port. Quit Twinkle Tray or Monitorian too before a knob takes a screen, or the two apps fight over it.

Download for Windows

TheeJ for macOS