Don't bother. I have yet to see a Pocket PC or Palm based program that does transfer functions, and if you want to accurately calibrate and analyze your
system, that is what you need, NOT a plain
RTA.
This is what a program like
Smaart or SpectraFoo does on a laptop. The difference is that these programs take time into account and allow you to distinguish between what's coming out of the speakers, background noise, reflections,
etc. They also have impulse tools to help you
line up delay systems, in addition to RTAs (which do have their uses, just NOT for
system tuning).
Not sure why you would lug around as oscilloscope; that is useful for troubleshooting hardware, but not for
system tuning.
--A