![]() ![]() Looks like all of these measurement packages are good at some things and not others, I'll have to research how to fix the phase issue with REW, as Homimpulse only lets you look at 3 response graphs at a time, and the Umik-1 is well supported in REW. I was banging my head against the wall for a while (with both WinPCD and the PCD spreadsheet) as this messy phase results in very "jagged" graphs at the crossover point - but thanks to some advice from the WinPCD author, I loaded in Holmimpulse measurements instead and got coherent looking calculations. I was using REW for measurements (which has direct support for my shiny new MiniDSP UMIK-1 USB microphone) - but I the FRD files it generated have the phase all over the place (constantly wrapping around) compared to the same measurements with Holmimpulse - the documentation says something about having to have a loopback RCA cable set up so it can take into account system delay or something to get workable phase, but as the UMIK-1 is a direct USB device I don’t seem to have that option. Otherwise it works mostly the same, where you import ZMA impedance files and FRD frequency response files for the drivers you are playing with, and adjust away. It has the advantage of separate, re-sizable windows for the frequency total frequency response graph, and a labelled circuit diagram that shows you the location and values of the components. It is an MS-Windows package that implements a fair bit of the functionality of Jeff Bagby's "passive crossover designer" excel spreadsheet. I just found this newish package called WinPCD: ![]()
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