Yep; I was uncertain as to how far the frequencies were being shifted. I have the Signia AX7. I frequent a forum for adult musicians with hearing loss. this issue comes up all the time across all brands. Many–most?–hearing aid audis are unfamiliar with this whole phenomenon or for tweaking aids for musicians in general. Mine wasn’t either but she was willing to work with me on this. Comically, the first Signia audi tech that we worked with hadn’t a clue–and neither did I really at that point. Adjustments were made that didn’t help at all. The second Signia tech likewise had no clue. My audi let me take over essentially and turning the feedback manager off entirely was easy; as was turning off wind block -over the objections of the Signia audi who didn’t get that I play indoors where wind is not an issue. Of course all of this was confined to the one Musician program. anyway, it worked and I’m a happy camper.
My guess is that the audis all wonder how much difference could it make turning the feedback manager from the lowest setting to entirely off. All the difference in the world, it turns out.