Quote:I'm not that familiar with REW, but I'm pretty sure you can't use an Audyssey-specific mic. IIRC, you need to buy a separate mic and calibrate either it or your laptop's sound card or perhaps both. See this link for more information: REW Help Contents
Quote:Yes. A peak at a frequency means that that frequency will be played louder than the rest of the frequencies in the sub's "flat" (+/-3dB) frequency range. A null means the frequency will be played more quietly.
1) a peak means that the sub sounds higher than it should and null means that you can't hear as much as you should?
Quote:Very un-technically-speaking, the DSP would test the sub, measure the response and load into memory an EQ profile that would take all incoming signals and boost* or cut them as required to output to the sub a "flat" signal to play.
2) what the dsp changes in order to achieve that result? (flat response) it lowers / higher the db when it detects sounds at specific frequencies? for example when it sees that is used to be peaks there, it lowers the db of the sound coming in, and when it detectes a sound at a null frequency, it adds more db?
See these Audyssey before-and-after images to get an idea of the type of equalization that it - and, similarly, miniDSP - can provide.
(*Not sure how much boosting is done, because boosting at low frequencies can result in a very large demand for power if the output level is high. Most likely, the EQ profile would attempt to cut peaks as much as possible, and perhaps boost nulls where it makes sense to do so.)
Edited by eljaycanuck - 1/17/13 at 2:21pm