High Pitch noise FEEDBACK!

[chriz_batman]

Do you guys know what this high pitch feedback noise i get when i plug a modeler with high gain distortion into the effects loop? Thanks

 

[jdurso]

Do you guys know what this high pitch feedback noise i get when i plug a modeler with high gain distortion into the effects loop? Thanks

the distortion should go infront of the amp like an OD pedal... basically with it in the loop, your distorting an already distorted signal.... hence the craziness