I made an account just to reply to this. I recently switched to Windows 11 and also get horrible static and buzzing from Graphic EQ while using bluetooth headphones. This also happens with the Convolution filter, which also affects HeSuVi. What I found out is that impulse responses with a sample rate of 44100 Hz loaded through hesuvi doesn't get any buzzing, but it sums both LR to mono instead of convolving. All is fine on non-bluetooth headphones. I figured this was a bug caused by a change in Windows...