Good luck.

Before you do upgrade look at your ASUS ROG audio GUI, I'm sure it's different than my maximus Xi hero GUI, and know where the line-in playback setting is (may as well note where all settings are) so you can go right to them in win 11 and put them back

Turns out I've got similar problem on my 2-in-1 Inspiron laptop. The Reltek GUI there also disappeared, i.e., non-functioning in Win 11, and there is no way in win 11 audio settings to control line-in volume without that GUI. So when I use my FX3 OR FM9 8x8 USB audio as my ASIO the 8 in's, when trying to monitor RETURNED audio, the audio is again zeroed so I can't hear the returned audio. It's just a matter of finding a reltek HD audio manager that works in win 11, probably have to install in some previous compatibility mode to get GUI to work. I remember doing this same tap dance in win 10 when I first got the laptop - the Dell drivers only installed the HD audio drivers but no way to control the in's and outs

BTW That laptop has one generation too old CPU that doesn't meet MS requirements so I used Rufus to by-pass all the "unsupported hardware" requirements [TPM, CPU, secure boot, turned off bit locker, and set local account - bypassing need for MS account) works fine.

Wifes laptop doesn't even have TPM (CPU PPT) and is two CPU Generations too old and again Rufus let me bypass all that and put win 11 pro on that machine as well. Just did that to see if it worked and it does - can always go back to win 10 on all my laptops and desktop (which does have everything win 11 "needs") if I get fed up with win 11.

Rufus was faster than manually editing registry to bypass all that stuff - that's all Rufus does anyway

Larry

PS - I'm not telling, or suggesting, ANYONE who doesn't know what they are doing to bypass MS requirements to put win 11 on their machines. You do so at your own risk, nuff said.

Win10Pro,i9,64GB,2TBSSD+20TBHDDs,1080TI,BIAB'24,Scarlett18i8,Montage7,Fusion 8HD,QS8,Integra7,XV5080,QSR,SC-8850,SPLAT,FL21&others,Komp.14,IK suite&others, just a guitar player-AXE FX III &FM9T, FishmanTP, MIDIGuitar2, GK2/3'sw/GI20