Pulsating Feedback

[FXPP]

Hi
I have an Apollo x4 and when the console, meter and control panel, a pulsating feedback is created that gets louder and louder.
Please advise.
Thank you.

 

[LesBrown]

Do you have the talkback mic turned on by mistake?

 

[FXPP]

talkback mic turned on

Hi Les, thank you for your reply. It doesn't matter if the talkback mic is turned on or not. The pulsating feedback still occurs

 

[UniversalAudio]

Hi Les, thank you for your reply. It doesn't matter if the talkback mic is turned on or not. The pulsating feedback still occurs

Can you make a vid? We don't have much to go on right now.