Update: 3/23/23
Finished the desktop app! 😀 It's more or less feature complete depending on the DAC firmware version (some don't have 'Mute' control available: to unmute, simply press one of the volume buttons).
The app is written in python and made stand-alone with 'pyinstaller'. No need to install anything, simply unzip the folder and open the 'CometCampground.exe' (I thought the name was fun). It should automatically choose the right COM port: If not, it can be clicked to show a list. To use it, you'll need this cable (non-affiliate link): https://www.amazon.com/dp/B07J3XS7DQ?psc=1&ref=ppx_yo2ov_dt_b_product_details
I take no responsibility for anything at all: not for damages, the apocalypse, your DAC and life spontaneously combusting to smithereens, etc. You use it at your own risk :) With that out of the way, the goods - Dropbox link to the app: https://www.dropbox.com/s/52uewv1uzqe24gu/CometCampground.zip?dl=0