This Streamdeck is a combination of Dave Madison's DIY streamdeck on https://www.partsnotincluded.com/diy-stream-deck-mini-macro-keyboard/ and omriharel's deej software to control the Volume in Windows https://github.com/omriharel/deej

The Buttons are configured as function keys in Windows (F13 to F20) and so you can use them in different programs. I use mine for switching the Windows sound device via Voicemeeter Banana.

For the software I added the Arduino file which gets uploaded to the Arduino Pro Micro. But I only really added the code of the two sources above together. So for any further information check both links.

I made my own custom keycaps by painting the whole top surface with a marker, laser engraving the image with a 250mW Laser and removing the residual non lasered marker with some soap and water.