It is a nice convenience to be able to convert from one cal file to another in the REW measurement panel. The current setup provides for that. I have done that on occasion when I had the wrong mic orientation loaded when I took the measurement for instance. I like this choice of setup for most common uses of REW. With the current setup the SPL/Phase charts are accurate even at the extremes of the frequency range.
I do find my SR charts and a couple others are questionable however. If my limited understanding is correct (questionable), the SR chart in REW is not accurate as the impact of the cal files is not included. The SR can be misleading for those of who are optimizing FIR phase correction over the entire 20-20k range range.
Possibly there could be a separate utility or documented workaround that would allow the cal files impact to be added into a measurement IR if needed? A workaround to convert the mic spl/phase cal file into an IR and convert the SC SPL/phase cal to an IR may be enough? Those 2 IRs could then be combined back into a measurement IR using REW trace arithmetic (invert/multiply??). Once combined then the resulting IR would provide the accurate SR and all all others (so long as the measurement panel shows no cal files loaded).
I have been meaning to try to understand this better to see if I can figure out a workaround myself, but my attempts so far have just resulted in mass brain confusion/shutdown. There appears to some type of
The SC and mic cals should be min phase so a conversion from SPL/phase into IRs should be possible (Hilbert Transform?). [I'm also thinking the REW trace arithmetic does not now include the needed functions even if the 2 cal IRs are available?]
I'm fine working outside REW in a separate utility if necessary for some of the steps if it makes the most sense. I am challenged though to purchase Mathcad or other pricey software and understand it well enough to do it that way.
It's clear this capability also has utility for those exporting measurements for DRC or other EQ uses as well.
Any suggestions from you, or out other members here, for a workaround procedure?