UR 44C and OBS Studio

Hello. I’ve bought an UR44C. I would like to conduct music streams through OBS. But OBS recognizes the first and second channels as left and right respectively. OBS does not hear other audio inputs. And I would like to use all channels. To record audio, I use Reaper and all the channels work fine there. By the way, I use Windows 7 and in the sound settings in Windows, only the first and second channels also work, judging by the volume indicator. What could be the problem?

Did you try loopback?

OBS would still probably recognize just first 2 channels but all audio inputs should be mixed into those 2 channels .

No, the Loopback function doesn’t help. The problem is that the other channels are not mixed with the first two.

Are you sure?

I don’t have obs installed. But when loopback is on windows picks up sound from any inputs.

Yes, I am sure.

By the way, the second and first channel does not work with Loopback either.
The first and second channels work without Loopback.

Could it be a problem in Windows 7? Maybe it works fine on Windows 10?

Can’t load pictures…

Anyway, I’ve wanted to upgrade to Windows 10 for a long time.