· Super Moderator
That item would work if you wanted to get the mic’s signal into the computer for the purposes of say, make a recording using a program like Audacity or Garage Band. But as brucek noted, for REW a sound card with line inputs and outputs is needed so that a calibration file can be generated. The calibration file is critical because it compensates for any deviation from flat that the sound card may exhibit. As you have figured out, to use the ECM8000 mic with REW, a mic pre amp with phantom power is needed, but it has to connect to the sound card, not directly to the computer. Alternately, a sound card with a built-in mic pre amp can be used; Tascam, E-MU and M-Audio and others make such products.