Ok - cheers, will add that to the to do list.
I’ve just rerun a nice clean dirac measurement and thought I’d have a play with Bass Control.
As regards Xovers I’m not sure the usual “set everything to say “80 or 100hz” applies or at least that’s not what I think Dirac are trying to achieve here.
From what I can ascertain, you run “BC calculate” and it is supposed to end up with the most Optimal Xover for each speaker group. I’m not sure that‘s working entirely correctly at the moment but I assume that’s the idea.
If you want to relocate the Xover on any group I believe you are supposed to find a point where both the sub and the speaker group you are looking at have good combined energy and choose that. Of course that could be different for each speaker group.
I‘ll see if I can improve the centre response (as that one looked the worst) by moving it‘s Xover around and then see if moving the Mains Xover from 40 to 80hz has any effect on the centre corrected trace. Every time you change a Xover level it takes a good 5 mins to recalculate.
Another point of note is you cannot change the original speaker groups it selects, well you can before you turn Bass Optimisation on (i.e old dirac) but as soon as you switch it on it puts all speakers back in the original auto calculated groups. It’s clearly on Lockdown
.
The other interesting question is can it make all these changes without altering any delays as I think the delays and levels you see loaded into the processor are fixed after the first mic measurement and never change.
It may be that it is changing timings but you never get to see what it has changed them to unless you measure it with REW.
Otherwise if it has fixed the original timings and levels it can only adjust other parameters such as phase presumably but I’ve always thought that If you change one it affects the other.
I think Dirac/Storm have some training planned on all this soon which may give us a bit more insight on how it all works.