deej
Set app volumes with real sliders! Arduino project to build hardware
...Runs from your system tray. Helpful notifications to let you know if something isn't working. The sliders are connected to 5 (or as many as you like) analog pins on an Arduino Nano/Uno board. They're powered from the board's 5V output (see schematic). The board connects via a USB cable to the PC. The code running on the Arduino board is a C program constantly writing current slider values over its serial interface. The PC runs a lightweight Go client in the background. This client reads the serial stream and adjusts app volumes according to the given configuration file.