JohnM,
Thanks for replying, great software. I paid $150 for ETF (RplusD), but I use yours because the GUI is a lot better, and it does exactly what I need without the complicated stuff I don't understand. I use it to measure my entire car stereo (Dynaudio drivers, Alpine F1, modded for car use Behringer DCX) to set the DCX as well as my 2 channel home stereo (Dynaudios, Conrad Johnson) to help place speakers, and panels / bass traps.
Anyway, I would really like to use my Mac laptop to do my measurements. I'm not sure that I quite understand your answer, though. Are you saying that I need to use the onboard audio in my Macbook to use REW, so in other words, I will not be able to use the Edirol at all?
On the Mac REW can only access the on-board audio input as Apple do not provide access to other input devices via the general JavaSound interface. You need to leave the input set as default and have the sample rate set to 44.1kHz. For Midi access you will need to use the plumstone drivers from
http://www.mandolane.co.uk/