These changes are in milliseconds. Every receiver on the market does this when you set the distance.
I know that. The distance is set to align the speakers to be at the acoustic center. If you mess with the timing for the purpose of equalizing the frequency response then you lose that. And change them enough and you lose sync with the video. Every frame in 24 fps movie is 40 milliseconds. It goes down to 16 msec for 60i video.
Faisal is in Pakistan. It's not like there is a Best Buy down the street from him. From this and our other discussions, stereo equipment isn't as easy to acquire or as cheap as it is here. He did what he had to do to make his system work.
I read him asking for feedback on his method and I provided some. I read that he has a DSP so he is not living in the desert with a rabbit ear and black and white TV
. But sure, if he can't afford some of the solutions, it is not for him. For others who also read these threads, it may provide some additional solution.
My guess is that Faisal has reflection issues from walls near his speakers. The auto calibration system is doing it's best to work with this but it doesn't satisfy his ears. He used his SPL meter and his ears to make changes that sound good to him. If he attacked the reflection issue (if there really is one) then he may have to make distance changes again.
Reflections are an issue above transition frequency and not in the modal region. This graph from my article shows this clearly:
In the frequencies below transition, sound is modeled using wave acoustics so we do not talk about reflections (other than the fact that they are responsible for room resonances). Best solution for this region is as I have described in the article which follows the teachings of Dr. Toole. Optimal placement of two or more subs is the key together with a DSP. If OP has one sub, he may be able to get a second. If he can't, he can use his DSP to pull down the peaks. As I noted, if he wants to do nothing and he is happy, that is fine too