: Since the game requires local files, you can use Audacity to record audio from streaming desktop apps. Use the Windows WASAPI host and set the recording device to your loopback speakers/headphones.
: Advanced users can edit .sync files. The format includes version info, song length (seconds/units), BPM, and confidence scores. It also maps transitions (Low, Normal, High, Explode) and specific obstacle time-points. Custom Skins & Modding
For those looking to 100% the game, focus on track volume and accuracy: : Score 5 hearts on a single track.