If your music is digital, this is all done in the PCM domain without any extra analog/digital conversion steps. This means you run Dirac Live on a computer, measure the room at the listening position, and download wirelessly the computed filters to the XMC-1's single Dirac preset. However, it needs the assistance of a computer (and an internet connection) at calibration time. The Emotiva XMC-1 processor has built-in Dirac Live room correction. Proper speaker and hearer placement (see relevant Floyd O'Toole articles here and here), room treatment, and digital signal processing methods (aka Room Correction) can mitigate many of these undesirable effects and clearly improve sound reproduction. (See here and here for two introductory articles by Michel Leduc on the topic of Listening Room Acoustics and why it matters.) Loudspeakers interact with the room bouncing sound waves off walls, ceilings, and floors, possibly muddying the sound received at the listening position. All normal rooms have modes that induce standing waves that interfere destructively with sound reproduction.
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