Anyone know where I can get more detailed TACT information? For instance, on what type of filter it is creating and what type of frequency response graphing it uses. I ask because I have some problems with (1) the technical descriptions on the website and with (2) what people have reported as frequency response graphs of the room. For instance:
(1) "The actual frequency response is compared to the desired frequency response defined by the user, and the system calculates an extremely complex inverse filter for each speaker which will give the desired frequency response with the best possible time behavior. The filter is itself an impulse (in the time domain) which corrects both the time and frequency domain behavior of the speaker - room combination."
This statement makes no sense to me -- how can a filter be an impulse? An impulse is, mathematically, something of infinite height and infinitely small width with a weight of one (analog) or a value of "one" put out for one duration of time (digital). How could a filter be an impulse? It might create an impulse in the time domain, but it cannot be an impulse in the time domain.
(2) The in room responses that I have seen indicate that the TACT is smoothing the response. When I compare the measurements by my ETF system versus the TACT measurements (granted, not in the same room), the TACT's measurements seem way too smooth. Either my room is terrible or the TACT is filtering at least the dips.
