I had a quick search and couldn't find anything related to this, so apologies if it has been covered previously.
I have a strange issue: high pitched, squealing feedback in my headphones when using higher-gain profiles.
I have discovered that it only happens when the Monitor Volume is above zero (i.e. the lowest setting) in the Output Settings. When Monitor Volume is at zero, it stops. This isn't a problem when playing with headphones normally, except that the singer in one of my bands refuses to wear in-ears, so I have to use a cab for him. The rest of us use in-ears, so the problem arises: I'm using Headphone Volume plus Monitor Volume and the result is unbearable feedback in my 'phones.
Is this something in my settings? Is it a fault? It seems as though there is signal bleed from one output to the other.
Any help would be much appreciated.