SD2 to WAV or AIFF?

I've been given a bunch of what I thought were SD2 files (created in Pro Tools) but I don't have Pro Tools and Logic Pro won't read them and so need to convert them to something that Logic Pro can read and ideally WAV as I need to do some PC stuff with them too later on. Any ideas what format they might be in and how I could convert them to ideally WAV?

Not sure what SD2 files are, but apparently Audacity (which is free) will handle them, as they're supported by libsndfile -- although I think you might need to compile libsndfile yourself...but might be something to look into nonetheless...