odd frequencies

[bkbannon3]

I have had my d8b for almost 2 years and use it regularly. I was recording a session last week and I noticed some odd noise around my recordings. When I input into mixer, sound is normal, when i arm track for recording, i get some odd frequencies around the tones. Never had this issue before, has anybody else dealt with this or have any ideas what might be going on? thanks Brian

[Mike Rivers]

You might have a feedback path someplace where you don't want it. Check your inputs and outputs and make sure you're not feeding one to the other through the path you want.