peppy wrote:
As I've said many times, osu! will support the tablet without drivers in the coming weeks. Don't bother with the included driver CD.
Also, the active area is clearly stated in the tablet thread: https://osu.ppy.sh/forum/t/169139Active Area: 4"x2.3" (10.2cm x 5.8cm)This is almost perfectly 16:9, which should work well with widescreen monitors. I had no ratio issues on the machines I tested with.
Since the game is played at 4:3 no matter what anything beyond it doesn't matter. I use a 16:9 since it's my monitor's native aspect ratio, but the tablet's screen resolution is native to the tablet's area (It's not really 16:10 but using the digital resolution for the tablet area 13499x21599 it gives you can get a precise ratio ).
I'm glad that you're supporting it without drivers (a big reason I got the tablet was to get native support from osu! itself).