Annoying hum on live broadcasts through Xsplit

We have this annoying hum on our live stream. We are using a capture card and if I go on FB live and Youtube direct from the capture card it’s fine. When we broadcast through Xsplit we get this noise.

Any advice on what we can do to get rid of it?

Hi there, can you provide screenshot of your stream settings and your Tools > Settings > Audio tab in XSplit?

Also, does the same issue happens when no audio coming in the capture card?

Checked the recording you sent, and can’t seem to hear or identify the humming you mentioned.