Where is my 21.5:9 aspect ratio for the 38" LG HDR WQHD?

[kmichels]

Hey all!
I was hoping to use BD on my M1 MBP to get a crisper display on my 38" LG HDR WQHD 3840 x 1600 (Ultra-wide 4K). The challenge I'm having though is that the aspect ratio is 21:9. The closest I can see is the 21.3:9 option which can give me 3840 x 1620, which predictably doesn't work all that well, and renders the display even fuzzier than before.

I might just be missing something obvious somewhere, due to insufficient supplies of coffee, but would appreciate any guidance anyone might have for me to use BD with this display.

Many thanks!

[waydabber]

Hi, 3840x1600 is 24:10 (sometimes indeed marketed as 21.5:9 because it sounds way cooler). Please try using that. :)