This guy article about " pure audio" make me understand ( i am a non scientist) why my mechanichal equalizer of Helmholtz resonators, (around my room and located near the tweeter of one speakers circling my room at 3 reflections spot and ending at the bass driver of the other speaker), why it work giving me a 3-d "timbre" surface-like location for each instrument in my room around me,but why the point-like precise location of each instruments is distorted also in some way because i cannot control the cross-talk, like it is the case with his computerized filters formulas separating each speakers from one another by feeding the right chanel data only inr the right speaker or left data for the left chanel only in the left speaker...
Alas! it is probably expansive and anyway not on the market because also of the dedicated measurements of head tracking needed...
It is a fascinating story....
I know understand at last WHY my Helmholtz grid is so interesting and for sure limited in his action and not without his limitations... I cannot eliminate crosstalk between speakers but my device ease the way each ears access the corresponding information in my treated and controlled room by improving the way my left speakers direct wave and the corresponding left one are treated by each ears...
But because of the uncontrolled crosstalk on my system, i cannot precisely locate the sounds source, and the original room acoustic data interfer with my own room acoustic data which never disapear completely like in the case of this "pure stereo" Bacch filters...
Anyway my experience trash my 7 headphones and put them at resat definitively...
Then in my experience i understand now after reading his article why i locate more than ever the timbre "surface"-like distribution of each instruments in space in my room like a fractals space, way more than the abstracted recorded sound source instrument "point" relative to other instruments precise "point"-like locationin the space volume from a precise perspective taken from the recording microphones in the original room acoustic...
I am not a scientist and this is only my interpretation and understanding...
One thing is certain, at no cost for me, my H. generators equalization of my room work well and i could never go back, in spite of his imperfection compared to this revolutionary new device for 3-D perfect localization...
This Bacch filter device is a revolution in audio....